65 results match your criteria peruvian rainforest

Fine root dynamics across pantropical rainforest ecosystems.

Glob Chang Biol 2021 May 12. Epub 2021 May 12.

Forestry Research Institute of Ghana, Council for Scientific and Industrial Research, University, Kumasi, Ghana.

Fine roots constitute a significant component of the net primary productivity (NPP) of forest ecosystems but are much less studied than aboveground NPP. Comparisons across sites and regions are also hampered by inconsistent methodologies, especially in tropical areas. Here, we present a novel dataset of fine root biomass, productivity, residence time, and allocation in tropical old-growth rainforest sites worldwide, measured using consistent methods, and examine how these variables are related to consistently determined soil and climatic characteristics. Read More

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First detection of antibodies against Leptospira among free-ranging neotropical non-human primates in the Peruvian Amazon lowland rainforest.

Transbound Emerg Dis 2021 Apr 25. Epub 2021 Apr 25.

Infectious Diseases, Washington University in St Louis School of Medicine, Saint Louis, MO, USA.

Leptospirosis is a bacterial zoonotic disease with multiple serogroups that infects wildlife and humans alike. Several studies have detected the presence of leptospiral antibodies in captive Neotropical primates, suggesting that they are asymptomatic carriers. However, the presence of antibodies in free-ranging primates and their potential role as reservoirs for this pathogen is not known. Read More

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Abdominal dioctophymosis in a domestic cat from the Peruvian rainforest confirmed morphologically and molecularly.

Parasitol Int 2021 Aug 18;83:102359. Epub 2021 Apr 18.

Laboratorio de Epidemiologia y Economía Veterinaria, Facultad de Medicina Veterinaria, Universidad Nacional Mayor de San Marcos, Av. Circunvalación 2800, San Borja. Lima, Peru.

A case of abdominal dioctophymosis in a domestic cat was found in San Juan Bautista district, the Peruvian rainforest, in the Loreto department of Peru. The pet went to a veterinary clinic for a routine ovariohysterectomy during which a large nematode was found in the abdominal cavity. The nematode was morphologically identified as an adult female of Dioctophyme sp. Read More

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Screening for Human T-Cell Lymphotropic Virus (HTLV) in Pregnant Women in the Peruvian Amazon and Systematic Review with Meta-Analysis of HTLV Infection in Peru.

Pathogens 2021 Feb 25;10(3). Epub 2021 Feb 25.

Infectious Diseases and Tropical Medicine Service, Regional Hospital of Loreto & National University of the Peruvian Amazon & Medical Department, Amazon Rainforest Civil Association, Iquitos 16001, Peru.

. Human T-cell lymphotropic virus type 1 (HTLV-1) is responsible for tropical spastic paraparesis and HTLV-1-associated leukemia/lymphoma. The infection is endemic in some areas of Peru, but its prevalence in the Peruvian Amazon is not well established. Read More

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February 2021

Cervical cancer mortality in Peru: regional trend analysis from 2008-2017.

BMC Public Health 2021 01 26;21(1):219. Epub 2021 Jan 26.

Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, MD, USA.

Background: Cervical cancer is the third leading cause of cancer-related death among Latin American women. Peru has the sixth highest mortality rate for cervical cancer in the region with regional variations. We aimed to determine overall and regional cervical cancer mortality rates and trends in Peru between 2008 and 2017. Read More

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January 2021

The genetic structure and adaptation of Andean highlanders and Amazonians are influenced by the interplay between geography and culture.

Proc Natl Acad Sci U S A 2020 12 4;117(51):32557-32565. Epub 2020 Dec 4.

Laboratorio de Biotecnología y Biología Molecular, Instituto Nacional de Salud, Lima 9, Peru;

Western South America was one of the worldwide cradles of civilization. The well-known Inca Empire was the tip of the iceberg of an evolutionary process that started 11,000 to 14,000 years ago. Genetic data from 18 Peruvian populations reveal the following: 1) The between-population homogenization of the central southern Andes and its differentiation with respect to Amazonian populations of similar latitudes do not extend northward. Read More

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December 2020

Breast cancer mortality trends in Peruvian women.

BMC Cancer 2020 Dec 1;20(1):1173. Epub 2020 Dec 1.

Department of Clinical Sciences and Community Health, Università degli Studi di Milano, 20133, Milan, Italy.

Background: Breast cancer (BC) is the most common malignancy in Latin American women, but with a wide variability with respect to their mortality. This study aims to estimate the mortality rates from BC in Peruvian women and to assess mortality trends over 15 years.

Methods: We calculated BC age-standardized mortality rate (ASMR) per 100,000 women-years using the world standard SEGI population. Read More

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December 2020

Healthcare and Health Problems from the Perspective of Indigenous Population of the Peruvian Amazon: A Qualitative Study.

Int J Environ Res Public Health 2020 10 22;17(21). Epub 2020 Oct 22.

Research Group CTS 969 Innovation in HealthCare and Social Determinants of Health, Faculty of Nursing, Physiotherapy and Podiatry, University of Seville, 41009 Seville, Spain.

Indigenous communities usually experience higher levels of mortality and poorer access to healthcare services compared to non-indigenous communities. This study aims to understand the most prevalent health problems and their treatment in the Asháninka indigenous communities of the Peruvian Amazon. We conducted an ethnographic study in order to explore the perceived health problems, the use of traditional medicine and the resources offered by the official Peruvian healthcare system. Read More

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October 2020

Chagas Disease in Pregnant Women in the Peruvian Amazon Basin. Cross-Sectional Study.

Front Vet Sci 2020 15;7:556. Epub 2020 Sep 15.

Infectious Diseases and Tropical Medicine Service, Loreto Regional Hospital, Iquitos, Peru.

To assess the prevalence of Chagas disease in pregnant women in Iquitos City, Peru. Cross-sectional survey in 300 pregnant women in Iquitos (Peru) from 1 May 2019 to 15 June 2019. Women were tested using an ELISA serology test. Read More

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September 2020

Taxonomic status of the Neotropical salamanders Bolitoglossa altamazonica and Bolitoglossa peruviana (Amphibia: Caudata: Plethodontidae), with the description of a new species from Northern Peru.

Zootaxa 2020 Aug 20;4834(3):zootaxa.4834.3.3. Epub 2020 Aug 20.

Departamento de Herpetología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Av. Arenales 1256, Jesus Maria, Lima 14, Peru..

We examine the phylogenetic relationships among salamanders of the genus Bolitoglossa (Eladinea) distributed in the Amazonian basin of northern Peru and southern Ecuador and assess species diversity based on morphological and phylogenetic analyses. We infer a molecular phylogeny using sequences from two mitochondrial (Cytb, 16S) and two nuclear genes (RAG-1, POMC). We find two well-supported subclades, one including [B. Read More

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Neotropical Melyroidea group cockroaches reveal various degrees of (eu)sociality.

Naturwissenschaften 2020 Sep 1;107(5):39. Epub 2020 Sep 1.

Institute of Zoology SAS, Dúbravská cesta 9, 845 06, Bratislava, Slovakia.

Eusociality in its various degrees represents an animal social system characterised by cooperative brood care, differentiation into castes and generational overlap. The fossil record indicates that eusociality is likely to have originated in hymenopterans and blattodeans during the Cretaceous. In this study, we present findings from surveys in Peruvian (Villa Carmen) and Ecuadorian (Rio Bigal, El Reventador) cloud forests revealing the first extant cockroach species living in complex, structured groups (n = 90-200 individuals, ˃ 20 adults). Read More

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September 2020

Micrurus surinamensis Peruvian snake venom: Cytotoxic activity and purification of a C-type lectin protein (Ms-CTL) highly toxic to cardiomyoblast-derived H9c2 cells.

Int J Biol Macromol 2020 Dec 8;164:1908-1915. Epub 2020 Aug 8.

Departamento de Bioquímica e Imunologia, ICB, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, CEP: 31270-901 Belo Horizonte, Minas Gerais, Brazil. Electronic address:

Micrurus surinamensis (Cuvier, 1817), popularly known as aquatic coral snake, has a broad geographic distribution in the Rainforest of South America. The purpose of this study was to investigate the cytotoxic effect caused by M. surinamensis venom in H9c2 cardiomyoblast cells and to identify protein components involved in cardiotoxic processes. Read More

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December 2020

Taito adrik, a new harvestman species from the Área de Conservación Privada Panguana, Peruvian Amazonia (Opiliones: Laniatores: Cosmetidae).

Zootaxa 2020 Jan 28;4729(1):zootaxa.4729.1.7. Epub 2020 Jan 28.

SNSB, Bavarian State Collection of Zoology (ZSM), Münchhausenstr. 21, 81247 Munich, Germany.

A new species of the cosmetid harvestman genus Taito Kury Barros 2014 is described from the Área de Conservación Privada (ACP) Panguana, Peruvian Amazonia, which extends the distribution range of the genus to the south-west. The herein described species Taito adrik sp. nov. Read More

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January 2020

Viral hepatitis in the Peruvian Amazon: Ethnomedical context and phytomedical resource.

J Ethnopharmacol 2020 Jun 5;255:112735. Epub 2020 Mar 5.

Univ. Lille, INRA, YNCREA, Univ. Artois, Univ. Littoral Côte d'Opale, EA 7394-ICV-Institut Charles Viollette, F-59000, Lille, France.

Ethnopharmacological Relevance: An extensive ethnopharmacological survey was carried out in the Peruvian Amazonian district of Loreto with informants of various cultural origins from the surroundings of Iquitos (capital city of Loreto) and from 15 isolated riverine Quechua communities of the Pastaza River. A close attention was paid to the medical context and plant therapy, leading to the selection of 35 plant species (45 extracts). The extracts were tested for antiviral activity against HCV with counting of Huh-7 cellular death in case of toxicity, and cytotoxicity was evaluated in HepG2 cells. Read More

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Age and altitude of residence determine anemia prevalence in Peruvian 6 to 35 months old children.

PLoS One 2020 15;15(1):e0226846. Epub 2020 Jan 15.

Instituto de Investigaciones de la Altura, Universidad Peruana Cayetano Heredia, Lima, Perú.

Background: A Demographic and Family Health Survey (ENDES, for Encuesta Demográfica y de Salud Familiar in Spanish) is carried out annually in Peru. Based on it, the anemia prevalence was 43.6% in 2016 and 43. Read More

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In vitro and in vivo growth inhibition of human acute promyelocytic leukemia HL-60 cells by Guatteria megalophylla Diels (Annonaceae) leaf essential oil.

Biomed Pharmacother 2020 Feb 30;122:109713. Epub 2019 Dec 30.

Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, 40296-710, Brazil. Electronic address:

Guatteria megalophylla Diels (Annonaceae) is an 8-10 m tall tree that grows near streams and is widely spread throughout Colombian, Ecuadorian, Peruvian, Brazilian and Guianese Amazon rainforest. Herein, we investigated for the first time the chemical composition and in vitro and in vivo anti-leukemia potential of G. megalophylla leaf essential oil (EO) using human promyelocytic leukemia HL-60 cells as model. Read More

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February 2020

Type 2 diabetes mellitus prevalence between 2005 and 2018 in population under 30 using data from the Ministry of Health of Peru.

Medwave 2019 Nov 13;19(10):e7723. Epub 2019 Nov 13.

Universidad Continental, Lima, Perú. ORCID: 0000-0003-1700-2638.

Introduction: Type 2 diabetes mellitus is a health problem in low and middle-income countries like Peru. There are few published reports on trends and surveillance of this disease in the young Peruvian population.

Objective: To describe the prevalence of type 2 diabetes mellitus in the population under 30 registered between 2005 and 2018 by the Ministry of Health of Peru. Read More

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November 2019

Rediscovery of the rare Andean blindsnake Anomalepis colombia Marx 1953 (Serpentes: Anomalepididae) in the wild.

Zootaxa 2019 Jun 26;4623(3):zootaxa.4623.3.13. Epub 2019 Jun 26.

Grupo de Herpetología de la Universidad del Quindío (GHUQ), Armenia, Quindío, Colombia. Grupo de Cladistica Profunda y Biogeografía histórica, Laboratorio de Anfibios, Instituto de Ciencias Naturales, Universidad Nacional de Colombia, 7495 Bogotá, DC, Colombia..

The fossorial snake genus Anomalepis Jan 1860 currently comprises four species with distribution restricted to the Neotropics, occurring from Nicaragua to trans-Andean Peru. Species of Anomalepis occur on the mainland from sea level to about 2,700 m elevation in habitats that range from xerophyte vegetation to tropical wet forests (Kofron 1988; McDiarmid et al. 1999; Uetz et al. Read More

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Home chemical and microbial transitions across urbanization.

Nat Microbiol 2020 01 4;5(1):108-115. Epub 2019 Nov 4.

Department of Biochemistry and Microbiology, Rutgers University, New Brunswick, NJ, USA.

Urbanization represents a profound shift in human behaviour, and has considerable cultural and health-associated consequences. Here, we investigate chemical and microbial characteristics of houses and their human occupants across an urbanization gradient in the Amazon rainforest, from a remote Peruvian Amerindian village to the Brazilian city of Manaus. Urbanization was found to be associated with reduced microbial outdoor exposure, increased contact with housing materials, antimicrobials and cleaning products, and increased exposure to chemical diversity. Read More

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January 2020

Environmental impacts of the life cycle of alluvial gold mining in the Peruvian Amazon rainforest.

Sci Total Environ 2019 Apr 23;662:940-951. Epub 2019 Jan 23.

Peruvian Life Cycle Network (PELCAN), Department of Engineering, Pontificia Universidad Católica del Perú, Av. Universitaria 1801 San Miguel, 15088 Lima, Peru.

Alluvial gold mining activities in the Peruvian Amazon rainforest are responsible for mercury emissions and deforestation. To understand related environmental impacts, specifically toxicity and climate change, this study uses Life Cycle Assessment methodology. Four predominant extraction systems were selected and modelled and three scenarios that reflect currently available gold recovery systems were modelled: amalgamation, amalgamation with mercury recovery through retort system and gravimetric tables. Read More

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Assessment of Two Diabetes Point-of-care Analyzers Measuring Hemoglobin A1c in the Peruvian Amazon.

Ann Glob Health 2018 11 5;84(4):618-624. Epub 2018 Nov 5.

Duke Global Health Institute, Duke University.

Background: With an estimated 174 million undiagnosed cases of diabetes mellitus worldwide and 80% of them occurring in low- and middle-income countries an effective point-of-care diagnostic tool is key to fighting this global epidemic. Glycated hemoglobin has become a reliable biomarker for the diagnosis and prognosis of diabetes.

Objective: We assessed two point-of-care (POC) analyzers in multi-ethnic communities of the Amazon Rainforest in Peru where laboratory-based glycated hemoglobin (HbA1c) testing is not available. Read More

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November 2018

Familial resemblance in gross motor coordination. The Peruvian Sibling Study on Growth and Health.

Ann Hum Biol 2018 Sep - Dec;45(6-8):463-469

c CIFI2D, Faculty of Sport , University of Porto , Porto , Portugal.

Background: The development of gross motor coordination (GMC) is governed by biological and environmental factors whose effect sizes are still unclear.

Aim: To investigate sibling resemblance in GMC, as well as biological and environmental correlates of GMC among Peruvian children.

Materials And Methods: The sample comprised 1256 biological siblings (6-15 years old), from three geographical areas of Peru. Read More

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Trends and geographic pattern of stomach cancer mortality in Peru.

Cancer Epidemiol 2019 02 3;58:193-198. Epub 2018 Dec 3.

Department of Clinical Sciences and Community Health, Universita degli Studi di Milano, Milan, Italy.

Background: Stomach cancer mortality rates in South America are among the highest in the world. In Peru, stomach cancer has the highest absolute number of cancer deaths in both sexes combined. We estimated mortality rates for stomach cancer in Peru by sex and geographical region between 2008 and 2015. Read More

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February 2019

Prostate cancer mortality rates in Peru and its geographical regions.

BJU Int 2019 04 31;123(4):595-601. Epub 2018 Oct 31.

Department of Clinical Sciences and Community Health, Universitá degli Studi di Milano, Milan, Italy.

Objective: To evaluate the mortality rates for prostate cancer according to geographical areas in Peru between 2005 and 2014.

Materials And Methods: Information was extracted from the Deceased Registry of the Peruvian Ministry of Health. We analysed age-standardised mortality rates (world population) per 100 000 men. Read More

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The peopling of South America and the trans-Andean gene flow of the first settlers.

Genome Res 2018 06 7;28(6):767-779. Epub 2018 May 7.

Unidade de Xenética, Departamento de Anatomía Patolóxica e Ciencias Forenses, Instituto de Ciencias Forenses, Facultade de Medicina, Universidade de Santiago de Compostela, 15782 Galicia, Spain.

Genetic and archaeological data indicate that the initial Paleoindian settlers of South America followed two entry routes separated by the Andes and the Amazon rainforest. The interactions between these paths and their impact on the peopling of South America remain unclear. Analysis of genetic variation in the Peruvian Andes and regions located south of the Amazon River might provide clues on this issue. Read More

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A new species of small-eared shrew of the genus Cryptotis (Mammalia, Eulipotyphla, Soricidae) from the northernmost Peruvian Andes.

Zootaxa 2018 Jan 31;4377(1):51-73. Epub 2018 Jan 31.

Instituto de Ciencias de la Naturaleza, Territorio y Energías Renovables. Pontificia Universidad Católica del Perú, Av. Universitaria 1801, San Miguel, Lima, Perú Colección Científica-Museo de Historia Natural de la Universidad Nacional San Agustín, Av. Alcides Carrión s/n, Arequipa, Perú.

The northernmost Peruvian Andes, a unique biogeographic region characterized by the confluence of multiple distinct ecosystems (i.e. Amazon basin, Pacific rainforest, the Sechura Desert, the northern and central Andes), is the southernmost geographic range limit of the South American shrews representing the genus Cryptotis. Read More

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January 2018

Response of testate amoebae to a late Holocene ecosystem shift in an Amazonian peatland.

Eur J Protistol 2018 Jun 15;64:13-19. Epub 2018 Mar 15.

School of Geography and Sustainable Development, University of St Andrews, UK.

To date there have only been two studies using testate amoebae as palaeoecological indicators in tropical peatlands. Here we present a new ∼500-year testate amoeba record from San Jorge, a domed peatland in Peruvian Amazonia, which has a well-constrained vegetation history based on pollen analysis. We observe a major shift from Hyalosphenia subflava to Cryptodifflugia oviformis-dominated communities at ∼50 cm depth (c. Read More

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Conceptions and practices of an integrative treatment for substance use disorders involving Amazonian medicine: traditional healers' perspectives.

Braz J Psychiatry 2018 Apr-June;40(2):200-209. Epub 2017 Dec 18.

Department of Psychology, University of Fribourg, Fribourg, Switzerland.

Objective: The harmful use of psychoactive substances represents one of today's largest public health problems. Yet, in spite of its global relevance, current treatment for substance use disorders (SUDs) is still not entirely successful. The purpose of this study was to investigate alternative treatments and conceptions from traditional Amazonian medicine adapted to SUDs. Read More

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Mercury concentrations in bats (Chiroptera) from a gold mining area in the Peruvian Amazon.

Ecotoxicology 2018 Jan 3;27(1):45-54. Epub 2017 Nov 3.

Institut für Geoökologie, Abt. Umweltgeochemie, Technische Universität Braunschweig, Langer Kamp 19c, 38106, Braunschweig, Germany.

In the southeastern Peruvian Amazon, artisanal and small-scale gold mining (ASGM) is estimated to have released up to 300 tonnes of mercury (Hg) to the environment between 1995 and 2007 alone, and is claimed to be responsible for Hg concentrations above international thresholds for aquatic wildlife species. Here, we examined whether Hg concentrations in bat populations are potentially related to regional ASGM-Hg releases. We determined Hg concentrations in the fur of bats collected at three different distances from the major ASGM areas in Peru. Read More

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January 2018