407 results match your criteria Swimmer's Shoulder


Thermal preferences of bird schistosome snail hosts increase the risk of swimmer's itch.

J Therm Biol 2018 Dec 29;78:22-26. Epub 2018 Aug 29.

Department of Invertebrate Zoology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Toruń, Lwowska 1, 87-700 Toruń, Poland. Electronic address:

Ambient temperature strongly affects host parasite interactions, especially when both are ectothermic. Bird schistosomes, which cercariae are known as agents of swimmer's itch and their snail hosts can be a good example of this phenomenon. The snails of these parasites play the key role, as the source of harmful larvae. Read More

View Article
December 2018

Enhanced locomotion, effective diffusion and trapping of undulatory micro-swimmers in heterogeneous environments.

J R Soc Interface 2018 Nov 28;15(148). Epub 2018 Nov 28.

Department of Mathematics, Imperial College London, London, UK

Swimming cells and microorganisms must often move through complex fluids that contain an immersed microstructure such as polymer molecules or filaments. In many important biological processes, such as mammalian reproduction and bacterial infection, the size of the immersed microstructure is comparable to that of the swimming cells. This leads to discrete swimmer-microstructure interactions that alter the swimmer's path and speed. Read More

View Article
November 2018

Swimmer's itch in Canada: a look at the past and a survey of the present to plan for the future.

Environ Health 2018 10 25;17(1):73. Epub 2018 Oct 25.

School of Public Health, 357F South Academic Building, University of Alberta, Edmonton, AB, T6G 2G7, Canada.

Background: Cercarial dermatitis, colloquially "swimmer's itch", is a rash contracted in natural bodies of water, when people are exposed to skin-penetrating, larval flatworm parasites of the family Schistosomatidae, that emerge from aquatic snails. Swimmer's itch is a globally-distributed, allergic condition, of which we know very little regarding local dynamics of transmission. This study aims to gather relevant information on swimmer's itch in Canada, from multiple perspectives, including the human experience, parasite and host presence and distributions, and insight from historical perspectives. Read More

View Article
October 2018
8 Reads

Clustering of microswimmers: interplay of shape and hydrodynamics.

Soft Matter 2018 Oct;14(42):8590-8603

Theoretical Soft Matter and Biophysics, Institute for Advanced Simulation and Institute of Complex Systems, Forschungszentrum Jülich, D-52425 Jülich, Germany.

The spatiotemporal dynamics in systems of active self-propelled particles is controlled by the propulsion mechanism in combination with various direct interactions, such as steric repulsion and hydrodynamics. These direct interactions are typically anisotropic, and come in different "flavors", such as spherical and elongated particle shapes, pusher and puller flow fields, etc. The combination of the various aspects is expected to lead to new emergent behavior. Read More

View Article
October 2018

Pharmacist, physician, and patient opinions of pharmacist-treated minor ailments and conditions.

J Am Pharm Assoc (2003) 2018 Nov - Dec;58(6):599-607. Epub 2018 Sep 25.

Objectives: To determine physician, pharmacist, and patient perceptions of pharmacist-provided treatment services for minor ailments and conditions and to assess the potential for community pharmacists to improve access to care in medically underserved areas.

Design: Qualitative and quantitative semi-structured key informant interview.

Setting: Rural eastern Washington State from March to June 2016. Read More

View Article
September 2018
6 Reads

Agents of swimmer's itch-dangerous minority in the Digenea invasion of Lymnaeidae in water bodies and the first report of Trichobilharzia regenti in Poland.

Parasitol Res 2018 Dec 13;117(12):3695-3704. Epub 2018 Sep 13.

Department of Invertebrate Zoology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University in Toruń, Toruń, Poland.

Trichobilharzia spp. have been identified as a causative agent of swimmers' itch, a skin disease provoked by contact with these digenean trematodes in water. These parasites have developed a number of strategies to invade vertebrates. Read More

View Article
December 2018
1 Read

Use of qPCR-Based Cercariometry to Assess Swimmer's Itch in Recreational Lakes.

Ecohealth 2018 12 17;15(4):827-839. Epub 2018 Aug 17.

School of Public Health, University of Alberta, Room 3-57, South Academic Building, Edmonton, AB, T6G 2G7, Canada.

Swimmer's itch (cercarial dermatitis) is a nuisance encountered by bathers and recreational water users worldwide. The condition is caused by the penetration of larval digenean trematodes (cercariae) of the family Schistosomatidae, into the skin, following their release into freshwater from pulmonate snails that serve as the intermediate hosts for these parasites. This study utilizes qPCR-based cercariometry to monitor and quantify cercariae from water samples collected at 5 lakes in northern Michigan. Read More

View Article
December 2018

Impairment of retinal function in yellow perch by metacercariae.

Int J Parasitol Parasites Wildl 2018 Aug 6;7(2):171-179. Epub 2018 May 6.

University of Michigan Biological Station, Pellston, MI, USA.

Histologic studies of fish from Douglas Lake, Cheboygan County, Michigan, USA show that spp. infect the lens of spottail shiners () and common shiners (). In contrast, infection was confined to the choroidal vasculature of yellow perch (), and the morphology of the pigment epithelium and retina in regions adjacent to the metacercariae was abnormal. Read More

View Article
August 2018
12 Reads

as a potential defender against swimmer's itch in European recreational water bodies-experimental study.

PeerJ 2018 25;6:e5045. Epub 2018 Jun 25.

Department of Invertebrate Zoology, Faculty of Biology and Environment Protection, Nicolaus Copernicus University of Torun, Toruń, Poland.

Swimmer's itch is a re-emerging human disease caused by bird schistosome cercariae, which can infect bathing or working people in water bodies. Even if cercariae fail after penetrating the human skin, they can cause dangerous symptoms in atypical mammal hosts. One of the natural methods to reduce the presence of cercariae in the environment could lie in the introduction of non-host snail species to the ecosystem, which is known as the "dilution" or "decoy" effect. Read More

View Article
June 2018
8 Reads

Exposure to Human-Associated Chemical Markers of Fecal Contamination and Self-Reported Illness among Swimmers at Recreational Beaches.

Environ Sci Technol 2018 Jul 14;52(13):7513-7523. Epub 2018 Jun 14.

U.S. Environmental Protection Agency, Office of Research and Development , National Health and Environmental Effects Research Laboratory , 109 T.W. Alexander Drive , Research Triangle Park , North Carolina 27709 , United States.

Anthropogenic chemicals have been proposed as potential markers of human fecal contamination in recreational water. However, to date, there are no published studies describing their relationships with illness risks. Using a cohort of swimmers at seven U. Read More

View Article
July 2018
2 Reads

Improving Fluoroscopic Visualization for Lower Cervical Medial Branch Blocks with a Modified Swimmer's View: A Technical Report.

Pain Physician 2018 05;21(3):303-308

Department of Physical Medicine and Rehabilitation, Rothman Institute, Philadelphia, PA.

Background: Neural blockade of the cervical medial branches is a validated procedure in the diagnosis and treatment of cervical zygapophyseal joint pain. Fluoroscopic visualization of the lower cervical medial branch target zones (CMBTZs) in lateral view is sometimes challenging or not possible due to the patient's shoulders obscuring the target. Large shoulders and short necks often exacerbate the problem. Read More

View Article

Maximum in density heterogeneities of active swimmers.

Soft Matter 2018 Jun;14(23):4666-4678

Max-Planck-Institute for Dynamics and Self-Organization, Am Fassberg 17, 37077 Göttingen, Germany.

Suspensions of unicellular microswimmers such as flagellated bacteria or motile algae can exhibit spontaneous density heterogeneities at large enough concentrations. We introduce a novel model for biological microswimmers that creates the flow field of the corresponding microswimmers, and takes into account the shape anisotropy of the swimmer's body and stroke-averaged flagella. By employing multiparticle collision dynamics, we directly couple the swimmer's dynamics to the fluid's. Read More

View Article

The Swimmer's Shoulder: Multi-directional Instability.

Curr Rev Musculoskelet Med 2018 Jun;11(2):167-171

Sports Medicine and Shoulder Service, Hospital for Special Surgery, 535 E 70th Street, New York, NY, 10021, USA.

Purpose Of Review: Swimmer's shoulder is the term used to describe the problem of shoulder pain in swimmers. Originally described as supraspinatus tendon impingement under the coracoacromial arch, it is now understood that several different pathologies can cause shoulder pain in competitive swimmers, including subacromial impingement syndrome, overuse and subsequent muscle fatigue, scapular dyskinesis, and laxity and instability.

Recent Findings: Swimmers may develop increased shoulder laxity over time due to repetitive use. Read More

View Article
June 2018
21 Reads

Nonlinear Parametric Excitation Effect Induces Stability Transitions in Swimming Direction of Flexible Superparamagnetic Microswimmers.

Soft Robot 2018 Aug 5;5(4):389-398. Epub 2018 Apr 5.

2 Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong , Hong Kong, China .

Microscopic artificial swimmers have recently become highly attractive due to their promising potential for biomedical microrobotic applications. Previous pioneering work has demonstrated the motion of a robotic microswimmer with a flexible chain of superparamagnetic beads, which is actuated by applying an oscillating external magnetic field. Interestingly, they have shown that the microswimmer's orientation undergoes a 90°-transition when the magnetic field's oscillation amplitude is increased above a critical value. Read More

View Article
August 2018
1 Read

Theory for controlling individual self-propelled micro-swimmers by photon nudging I: directed transport.

Phys Chem Chem Phys 2018 Apr;20(15):10502-10520

Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.

Photon nudging is a new experimental method which enables the force-free manipulation and localization of individual self-propelled artificial micro-swimmers in fluidic environments. It uses a weak laser to stochastically and adaptively turn on and off the swimmer's propulsion when the swimmer, through rotational diffusion, points towards or away from its target, respectively. This contribution presents a theoretical framework for the statistics of both 2D and 3D controls. Read More

View Article
April 2018
3 Reads

Intracyclic Velocity Variation of the Center of Mass and Hip in Breaststroke Swimming With Maximal Intensity.

J Strength Cond Res 2018 Mar;32(3):830-840

Department of Physical Education and Sport Science, School of Physical Education and Sport Science, Democritus University of Thrace, Komotini, Greece.

Gourgoulis, V, Koulexidis, S, Gketzenis, P, and Tzouras, G. Intra-cyclic velocity variation of the center of mass and hip in breaststroke swimming with maximal intensity. J Strength Cond Res 32(3): 830-840, 2018-The aim of the study was to compare the center of mass (CM) and hip (HIP) intracyclic velocity variation in breaststroke swimming using 3-dimensional kinematic analysis. Read More

View Article
March 2018
1 Read

Effective viscosity of a suspension of flagellar-beating microswimmers: Three-dimensional modeling.

Phys Rev E 2017 Nov 27;96(5-1):052610. Epub 2017 Nov 27.

LIPhy, Université Grenoble Alpes and CNRS, F-38402 Grenoble, France.

Micro-organisms usually can swim in their liquid environment by flagellar or ciliary beating. In this numerical work, we analyze the influence of flagellar beating on the orbits of a swimming cell in a shear flow. We also calculate the effect of the flagellar beating on the rheology of a dilute suspension of microswimmers. Read More

View Article
November 2017

Contribution of limbs' actions to the four competitive swimming strokes: a nonlinear approach.

J Sports Sci 2018 Aug 10;36(16):1836-1845. Epub 2018 Jan 10.

b Research Center in Sports Sciences , Health and Human Development (CIDESD) , Vila Real , Portugal.

The aim of our study was to assess the effect of the limbs' actions on the nonlinear properties of the four competitive swimming strokes. Forty-nine swimmers performed all-out sprints at front-crawl, backstroke, breaststroke and butterfly, each one at full stroke (FS), only the arms' stroke (AS), and only leg kicking (LK), in a total of 12 bouts, 6 per day. A speedo-meter cable was attached to the swimmer's hip, to collect the speed-time raw data (f = 50Hz). Read More

View Article
August 2018
3 Reads

Intracyclic Variation of Force and Swimming Performance.

Int J Sports Physiol Perform 2018 Aug 26;13(7):897-902. Epub 2018 Jul 26.

Context: In front-crawl swimming, the upper limbs perform alternating movements with the aim of achieving a continuous application of force in the water, leading to lower intracyclic velocity variation (dv). This parameter has been identified as a crucial criterion for swimmers' evaluation.

Purpose: To examine the assessment of intracyclic force variation (dF) and to analyze its relationship with dv and swimming performance. Read More

View Article
August 2018
3 Reads

Analysis of a swimmer's hand and forearm in impulsive start from rest using computational fluid dynamics in unsteady flow conditions.

J Biomech 2018 01 13;67:157-165. Epub 2017 Dec 13.

P' Institute, CNRS-University of Poitiers - ENSMA, UPR 3346, 11 Boulevard Marie et Pierre Curie, Téléport 2, BP 30179, 86962 Futuroscope Cedex, France.

The propulsive forces generated by the hands and arms of swimmers have so far been determined essentially by quasi-steady approaches. This study aims to quantify the temporal dependence of the hydrodynamic forces for a simple translation movement: an impulsive start from rest. The study, carried out in unsteady numerical simulation, couples the calculation of the lift and the drag on an expert swimmer hand-forearm model with visualizations of the flow and flow vortex structure analysis. Read More

View Article
January 2018

The curved kinetic boundary layer of active matter.

Soft Matter 2018 01;14(2):279-290

Department of Mechanical & Civil Engineering, Division of Engineering & Applied Science, California Institute of Technology, Pasadena, CA 91125, USA.

A body submerged in active matter feels the swim pressure through a kinetic accumulation boundary layer on its surface. The boundary layer results from a balance between translational diffusion and advective swimming and occurs on the microscopic length scale . Here , D is the Brownian translational diffusivity, τ is the reorientation time and l = Uτ is the swimmer's run length, with U the swim speed [Yan and Brady, J. Read More

View Article
January 2018

Comparison of Microbiological Flora in the External Auditory Canal of Normal Ear and an Ear with Acute Otitis Externa.

J Clin Diagn Res 2017 Sep 1;11(9):MC01-MC04. Epub 2017 Sep 1.

Associate Professor, Department of Ear, Nose and Throat, Kasturba Medical College, Manipal, Karnataka, India.

Introduction: Acute Otitis Externa (AOE) is also known as swimmer's ear. Investigations initiated during World War II firmly established the role of bacteria in the aetiology of Acute Otitis Externa.

Aim: To culture the microbiological flora of the normal ear and compare it with the flora causing AOE and to know the role of normal ear canal flora and anaerobes in the aetiology. Read More

View Article
September 2017
9 Reads

SHOULDER PAIN IN COMPETITIVE TEENAGE SWIMMERS AND IT'S PREVENTION: A RETROSPECTIVE EPIDEMIOLOGICAL CROSS SECTIONAL STUDY OF PREVALENCE.

Int J Sports Phys Ther 2017 Oct;12(5):798-811

University of Rome "Tor Vergata", Rome, Italy.

Background: The term "swimmer's shoulder" was first introduced in 1974 by Kennedy and Hawkins to describe a common condition among competitive swimmers characterized by pain and dysfunction of the shoulder complex. Currently, the term does not define a specific clinical diagnosis and its etiology is considered to be multifactorial. In the literature shoulder pain prevalence varies according to the adopted definitions (from 3% to 91%); however, in the Italian environment there is no prevalence study regarding swimmer shoulder. Read More

View Article
October 2017
1 Read

A novel position for D2 kyphoplasty: Swimmer's position.

Indian J Anaesth 2017 Aug;61(8):687-688

Department of Anaesthesia, Rajiv Gandhi Cancer Institute and Research Centre, Rohini, New Delhi, India.

View Article
August 2017
2 Reads

The effect of finger spreading on drag of the hand in human swimming.

J Biomech 2017 10 10;63:67-73. Epub 2017 Aug 10.

Department of Applied Physics, Eindhoven University of Technology and J.M. Burgers Centre for Fluid Dynamics, Postbus 513, 5600 MB Eindhoven, The Netherlands; Laboratory for Aero and Hydrodynamics, Delft University of Technology and J.M. Burgers Centre for Fluid Dynamics, 2628 CD Delft, The Netherlands. Electronic address:

The effect of finger spread on overall drag on a swimmer's hand is relatively small, but could be relevant for elite swimmers. There are many sensitivities in measuring this effect. A comparison between numerical simulations, experiments and theory is urgently required to observe whether the effect is significant. Read More

View Article
October 2017

Pacing profiles and competitive performance of elite female 400-m freestyle swimmers.

J Strength Cond Res 2017 Aug 4. Epub 2017 Aug 4.

1 Department of Biomechanics, Institute of Sport - National Research Institute, Warsaw, Poland 2College of Sport and Exercise Science, Victoria University, Melbourne, Australia.

Pacing can impact competitive endurance performance. The objective of this study was to determine relationships between pacing parameters and competitive performance of elite female 400-m freestyle swimmers. Publicly available websites provided 50-m split and final times for 381 swims of 20 elite female swimmers in over 150 national and international competitions between 2004 and 2016. Read More

View Article
August 2017
4 Reads

Contribution of the nasal passage to face mask ventilation: a prospective blinded randomized crossover trial.

Can J Anaesth 2017 Sep 16;64(9):935-939. Epub 2017 Jun 16.

Department of Anesthesiology, Osaka Medical College, Daigaku-machi 2-7, Takatsuki, Osaka, 569-8686, Japan.

Background: Previous studies have shown that the nasal passage plays an important role in manual face mask ventilation, but this has yet to be quantitatively assessed. We conducted a prospective randomized crossover clinical trial to compare the change in pressure-controlled face mask tidal volume with and without nasal airway occlusion.

Method: Female patients undergoing elective surgery under general anesthesia served as study subjects. Read More

View Article
September 2017

Nanodiamonds That Swim.

Adv Mater 2017 Aug 12;29(30). Epub 2017 Jun 12.

Max Planck Institute for Intelligent Systems, Heisenbergstr. 3, 70569, Stuttgart, Germany.

Nanodiamonds are emerging as nanoscale quantum probes for bio-sensing and imaging. This necessitates the development of new methods to accurately manipulate their position and orientation in aqueous solutions. The realization of an "active" nanodiamond (ND) swimmer in fluids, composed of a ND crystal containing nitrogen vacancy centers and a light-driven self-thermophoretic micromotor, is reported. Read More

View Article
August 2017
11 Reads

New evaluation index for the retainability of a swimmer's horizontal posture.

PLoS One 2017 9;12(5):e0177368. Epub 2017 May 9.

Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto, Japan.

This study aims to investigate the effect of changes in buoyancy when a swimmer respires in a horizontal posture. We attempted to evaluate the levelness of swimmers' streamline posture by simultaneously measuring the lung capacity and buoyancy under water. The buoyancy was measured based on the changes in the vertical loads of the upper and lower limbs on the subjects' streamline posture under water. Read More

View Article
September 2017
9 Reads

Use of Biotechnology Devices to Analyse Fatigue Process in Swimming Training.

J Med Syst 2017 Jun 4;41(6):94. Epub 2017 May 4.

Department of Physical Activity and Sport Science, Faculty of Sport Science, University of Castilla la Mancha, Toledo, Spain.

The aim of the present research was to analyze the acute psycho-physiological response during a high intensity interval training (HIIT) session of trained swimmers. We analyzed blood lactate concentration, heart rate, heart rate variability (HRV), arms isometric strength, rating of perceived exertion (RPE) and cortical arousal before and after a HIIT session in 14 trained swimmers (16.2 ± 2. Read More

View Article
June 2017
1 Read

Association between COMT Val158Met polymorphism and competition results of competitive swimmers.

J Sports Sci 2018 Feb 3;36(4):393-397. Epub 2017 Apr 3.

a Graduate School of Biomedical Sciences , Nagasaki University , Nagasaki City , Japan.

Recent studies have shown the contribution of genetic determinants to athletes' physical ability. However, despite the fact that cognitive abilities like self-control and stress-tolerance influence athletes' competitive performance, few studies to date have investigated the association between genetic polymorphism, which is linked to cognitive ability and athletic performance. The present study investigated the link between single-nucleotide polymorphisms (SNPs), which are known to exert influences on dopaminergic neural function and competitive performance of swimmers. Read More

View Article
February 2018
6 Reads

Double-Fueled Janus Swimmers with Magnetotactic Behavior.

ACS Nano 2017 04 29;11(4):3973-3983. Epub 2017 Mar 29.

Interdisciplinary Nanoscience Center (iNANO), Aarhus University , Gustav Wieds Vej 14, 8000 Aarhus, Denmark.

Self-propelled particles attract a great deal of attention due to the auspicious range of applications for which nanobots can be used. In a biomedical context, self-propelled swimmers hold promise to autonomously navigate to a desired location in an attempt to counteract cell/tissue defects either by releasing drugs or by performing surgical tasks. The vast majority of prior reports deal with single engine assemblies, often utilizing fuel molecules which are considered to be highly cytotoxic. Read More

View Article

Marine and Other Aquatic Dermatoses.

Indian J Dermatol 2017 Jan-Feb;62(1):66-78

Diving School, Naval Base, Kochi, Kerala, India.

Occupational and recreational aquatic activity predisposes our population to a wide variety of dermatoses. Sunburn, urticaria, jellyfish stings, and contact dermatitis to rubber equipment are common allergies that are encountered in the aquatic environment. Among the infections, tinea versicolor, intertrigo, and verruca vulgaris are widespread. Read More

View Article
February 2017
8 Reads

Self-Polarizing Microswimmers in Active Density Waves.

Sci Rep 2017 02 9;7:41884. Epub 2017 Feb 9.

Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People's Republic of China.

An artificial microswimmer drifts in response to spatio-temporal modulations of an activating suspension medium. We consider two competing mechanisms capable of influencing its tactic response: angular fluctuations, which help it explore its surroundings and thus diffuse faster toward more active regions, and self-polarization, a mechanism inherent to self-propulsion, which tends to orient the swimmer's velocity parallel or antiparallel to the local activation gradients. We investigate, both numerically and analytically, the combined action of such two mechanisms. Read More

View Article
February 2017
3 Reads

Individual-Environment Interactions in Swimming: The Smallest Unit for Analysing the Emergence of Coordination Dynamics in Performance?

Sports Med 2017 Aug;47(8):1543-1554

Centre d'Etude des Transformations des Activités Physiques et Sportives (CETAPS), Normandie Univ, UNIROUEN, 76000, Rouen, France.

Displacement in competitive swimming is highly dependent on fluid characteristics, since athletes use these properties to propel themselves. It is essential for sport scientists and practitioners to clearly identify the interactions that emerge between each individual swimmer and properties of an aquatic environment. Traditionally, the two protagonists in these interactions have been studied separately. Read More

View Article
August 2017
3 Reads

Hydrodynamic analysis of human swimming based on VOF method.

Comput Methods Biomech Biomed Engin 2017 May 27;20(6):645-652. Epub 2017 Jan 27.

b Department of Civil and Environmental Engineering , The Hong Kong Polytechnic University , Hong Kong , P.R. China.

A 3-D numerical model, based on the Navier-Strokes equations and the RNG k-ε turbulence closure, for studying hydrodynamic drag on a swimmer with wave-making resistance taken into account is established. The volume of fluid method is employed to capture the undulation of the free surface. The simulation strategy is evaluated by comparison of the computed results with experimental data. Read More

View Article
May 2017
1 Read

Numerical Investigation of Swimmer's Gliding Stage with 6-DOF Movement.

PLoS One 2017 26;12(1):e0170894. Epub 2017 Jan 26.

Department of Applied Mechanics and Engineering, Sun Yat-sen University, Guangzhou, China.

The purpose of this study is to analyze the motion status of swimmers during their gliding stage using a numerical simulation method. This simulation strategy is conducted by solving the 3D incompressible Navier-Stokes equations using the Realizable k-ε turbulence closure equations in combination with the Six Degrees of Freedom (6-DOF) method. The uneven mass distribution of a swimmer and the roughness of the surface of the body are taken into consideration. Read More

View Article
August 2017
2 Reads

Swimmer's Itch in Belgium: First Recorded Outbreaks, Molecular Identification of the Parasite Species and Intermediate Hosts.

Vector Borne Zoonotic Dis 2017 03 23;17(3):190-194. Epub 2017 Jan 23.

1 Research Unit in Parasitology and Parasitic Diseases, Fundamental and Applied Research for Animals & Health (FARAH), Faculty of Veterinary Medicine, University of Liège , Liège, Belgium .

Background: Cercarial dermatitis or swimmer's itch is a skin condition in humans due to the larval forms of bird schistosomes of some species of the genus Trichobilharzia. The life cycle of these schistosomes requires freshwater snails (intermediate host) and waterfowl (definitive host). Repeated exposures to cercariae can lead to skin sensitization with the induction of pruritic skin lesions. Read More

View Article
March 2017
2 Reads

Passive swimming in viscous oscillatory flows.

Phys Rev E 2016 Dec 28;94(6-1):063116. Epub 2016 Dec 28.

Electrical Engineering, University of Southern California, Los Angeles, California, USA; Theoretische Physik I, Universität Bayreuth, D-95440 Bayreuth, Germany; and Aerospace and Mechanical Engineering, University of Southern California, Los Angeles, California, USA.

Fluid-based locomotion at low Reynolds number is subject to the constraints of Purcell's scallop theorem: reciprocal shape kinematics identical under a time-reversal symmetry cannot cause locomotion. In particular, a single degree-of-freedom scallop undergoing opening and closing motions cannot swim. Most strategies for symmetry breaking and locomotion rely on direct control of the swimmer's shape kinematics. Read More

View Article
December 2016
4 Reads

Having bird schistosomes in mind-the first detection of Bilharziella polonica (Kowalewski 1895) in the bird neural system.

Parasitol Res 2017 Mar 23;116(3):865-870. Epub 2016 Dec 23.

Department of Wildlife Diseases, Leibniz Institute for Zoo and Wildlife Research, Alfred-Kowalke-Straße 17, 10315, Berlin, Germany.

Nasal bird schistosomes can cause bilharziosis in birds and have the potential to cause swimmer's itch in humans. We determined the prevalence of bird schistosomes in 106 mallards (Anas plathyrhynchos) from 11 water sources in Germany from 2014. Dissections were performed focusing on parasitic infections of the neural system. Read More

View Article
March 2017
1 Read

Propulsive limb coordination and body acceleration in sprint breaststroke swimming.

J Sports Med Phys Fitness 2017 Dec 24;57(12):1564-1571. Epub 2016 Nov 24.

Department of Physiotherapy, University School of Physical Education, Kraków, Poland.

Background: This work aimed at examining how coordination and kinematic indices interplay with swimming performance measured by average speed in 50 m all-out test.

Methods: The group of 34 male competitive swimmers (19.1±1. Read More

View Article
December 2017
2 Reads

Effect of Swim Training on the Physical Characteristics of Competitive Adolescent Swimmers.

Am J Sports Med 2016 11 18;44(11):2813-2819. Epub 2016 Oct 18.

Tampa Bay Rays, St Petersburg, Florida, USA.

Background: Subacromial space distance and forward head and shoulder posture are common characteristics resulting from swim training. These alterations can cause abnormal scapular kinematics and positioning, potentially increasing compression of structures in the subacromial space and increasing the risk for the development of swimmer's shoulder.

Purpose: To evaluate the effect of the swim training season on subacromial space distance and forward head and forward shoulder posture as well as to determine the relationship between these variables. Read More

View Article
November 2016
7 Reads

The "Ice-Mile": Case Study of 2 Swimmers' Selected Physiological Responses and Performance.

Int J Sports Physiol Perform 2017 May 13;12(5):711-714. Epub 2016 Oct 13.

Purpose: "Ice-mile" swimming presents significant physiological challenges and potential safety issues, but few data are available. This study examined deep body temperature (BT), respiratory rate (RR), and swim performance in 2 swimmers completing an ice-mile swim of 1 mile (1600 m) in water less than 5°C.

Methods: Two male cold-water-habituated swimmers completed a 1-mile lake swim in 3. Read More

View Article
May 2017
2 Reads

[A rare zoonosis in Hungary: cercarial dermatitis caused by Schistosoma turkestanicum blood-fluke].

Orv Hetil 2016 Oct;157(40):1579-1586

Parazitológiai és Állattani Tanszék, Szent István Egyetem, Állatorvos-tudományi Kar Budapest, István u. 2., 1078.

Several trematodes that parasitize vertebrate animals utilize swimming aquatic larvae to infect the host percutaneously. The most important ones among these parasites are the blood-flukes of birds and mammals comprising species that are also zoonotic. Within this latter group are species that cause the bilharziasis or schistosomiasis of inhabitants of the tropical countries, and other trematode species that are able to penetrate human skin, but do not develop to an adult form of the worm in the body. Read More

View Article
October 2016
14 Reads

The Relationship between Power Generated by Thrust and Power to Overcome Drag in Elite Short Distance Swimmers.

PLoS One 2016;11(9):e0162387. Epub 2016 Sep 21.

Department of Neurological, Biomedical and Movement Sciences, University of Verona, Verona, Italy.

At constant average speed (v), a balance between thrust force (Ft) and drag force (Fd) should occur: Ft-Fd = 0; hence the power generated by thrust forces (Pt = Ft·v) should be equal to the power needed to overcome drag forces at that speed (Pd = Fd·v); the aim of this study was to measure Pt (tethered swims), to estimate Pd in active conditions (at sprint speed) and to compare these values. 10 front crawl male elite swimmers (expertise: 93.1 ± 2. Read More

View Article
September 2016

Variation of Linear and Nonlinear Parameters in the Swim Strokes According to the Level of Expertise.

Motor Control 2017 Jul 19;21(3):312-326. Epub 2016 Aug 19.

3 Polytechnic Institute of Guarda.

The aim was to examine the variation of linear and nonlinear proprieties of the behavior in participants with different levels of swimming expertise among the four swim strokes. Seventy-five swimmers were split into three groups (highly qualified experts, experts and nonexperts) and performed a maximal 25m trial for each of the four competitive swim strokes. A speed-meter cable was attached to the swimmer's hip to measure hip speed; from which speed fluctuation (dv), approximate entropy (ApEn) and fractal dimension (D) variables were derived. Read More

View Article
July 2017
2 Reads

Comparison of Boric Acid and Combination Drug of Polymyxin, Neomycin and Hydrocortisone (polymyxin NH) in the Treatment of Acute Otitis Externa.

J Clin Diagn Res 2016 Jul 1;10(7):MC01-4. Epub 2016 Jul 1.

General Practitioner, Faculty of Medicine, Kashani Hospital, Shahrekord University of Medical Sciences , Shahrekord, Iran .

Introduction: Acute otitis externa is an inflammation of the external auditory canal known as "swimmer's ear". Direct costs including medical treatment, painkillers, antibiotics, steroids or both and indirect costs are also remarkable.

Aim: The aim of this study was to compare the effect of boric acid and polymyxin, neomycin and hydrocortisone composition in the treatment of acute otitis externa. Read More

View Article
July 2016
2 Reads

Optimization and small-amplitude analysis of Purcell's three-link microswimmer model.

Authors:
O Wiezel Y Or

Proc Math Phys Eng Sci 2016 Aug;472(2192):20160425

Faculty of Mechanical Engineering , Technion - Israel Institute of Technology , Haifa 32000, Israel.

This work studies the motion of Purcell's three-link microswimmer in viscous flow, by using perturbation expansion of its dynamics under small-amplitude strokes. Explicit leading-order expressions and next-order correction terms for the displacement of the swimmer are obtained for the cases of a square or circular gait in the plane of joint angles. The correction terms demonstrate the reversal in movement direction for large stroke amplitudes, which has previously only been shown numerically. Read More

View Article
August 2016
1 Read

Chemotaxis of artificial microswimmers in active density waves.

Phys Rev E 2016 Jul 15;94(1-1):012613. Epub 2016 Jul 15.

Department of Physics, Loughborough University, Loughborough, LE11 3TU, United Kingdom.

Living microorganisms are capable of a tactic response to external stimuli by swimming toward or away from the stimulus source; they do so by adapting their tactic signal transduction pathways to the environment. Their self-motility thus allows them to swim against a traveling tactic wave, whereas a simple fore-rear asymmetry argument would suggest the opposite. Their biomimetic counterpart, the artificial microswimmers, also propel themselves by harvesting kinetic energy from an active medium, but, in contrast, lack the adaptive capacity. Read More

View Article
July 2016
5 Reads