A new methodology for sampling blackflies for the entomological surveillance of onchocerciasis in Brazil

Autor: Érika Silva do Nascimento-Carvalho, Marilza Maia-Herzog, Raquel de Andrade Cesário, Arion T. Aranda, Vladimir Fazito do Vale, Ana Carolina dos Santos Valente
Rok vydání: 2017
Předmět:
0301 basic medicine
Veterinary medicine
Nematoda
Epidemiology
Physiology
lcsh:Medicine
Disease Vectors
Onchocerciasis
Geographical locations
0302 clinical medicine
Medicine and Health Sciences
Simuliidae
Statistical analysis
lcsh:Science
Multidisciplinary
Ecology
Ethics committee
Sampling (statistics)
Endemic area
Body Fluids
Professions
Improved performance
Infectious Diseases
Blood
Geography
Helminth Infections
Population Surveillance
Christian ministry
Onchocerca
Anatomy
Brazil
Research Article
Neglected Tropical Diseases
Infectious Disease Control
030231 tropical medicine
Large population
Disease Surveillance
03 medical and health sciences
Helminths
Parasitic Diseases
medicine
Animals
lcsh:R
Organisms
Reproducibility of Results
Biology and Life Sciences
South America
Tropical Diseases
Technicians
medicine.disease
Invertebrates
Insect Vectors
Onchocerca volvulus
Species Interactions
030104 developmental biology
Infectious Disease Surveillance
lcsh:Q
Population Groupings
People and places
Zoology
Entomology
Zdroj: PLoS ONE
PLoS ONE, Vol 12, Iss 7, p e0179754 (2017)
ISSN: 1932-6203
Popis: The effectiveness of the MosqTent® trap was evaluated in endemic area to onchocerciasis in Brazil. This study seeks to provide subsidies for the monitoring of the onchocerciasis transmission in the country. The study was carried out at the Homoxi and Thirei villages, located in the Yanomami Indigenous Land, in the state of Roraima. This area presents hyperendemicity, high blackflies densities, large population migrations and mining activities. The Homoxi and Thirei villages are assisted by the Brazilian Ministry of Health. To conduct the present study, the village leader, health leaders and the Brazilian Ethics Committee were consulted. Blackflies captures were carried out simultaneously at the Homoxi and Thirei, using systematized methods to allow for comparisons between the traditional Human Landing Catch (HLC) and HLC protected by the MosqTent®. The female blackflies were captured at two equidistant capture stations per locality, by two collectors per station, for five consecutive days. Individuals captured by interval/station/day were counted, identified and maintained at -20°C. The underlying probability distributions and the differences between the methods for the independent sample data were verified in a comparative statistical analysis between the use of the MosqTent® and the HLC. A total of 10,855 antropophilic blackflies were captured by both methodologies. A total of 7,367 (67.87%) blackflies belonging to seven species were captured by MosqTent® -Simulium incrustatum s.l (99.06%); S. guianense s.l (0.74%), S. oyapockense s.l (0.01%), S. exiguum (0.10%), S. metallicum (0.05%), S. ochraceum (0.03%) and S. minusculum s.l (0.01%). Moreover, 3,488 (32.14%) blackflies belonging to four species were captured by HLC-S. incrustatum s.l (98.33%); S. guianense s.l (1.38%), S. oyapockense s.l (0.26%) and S. metallicum (0.03%). The MosqTent® was more effective and efficient when compared to HLC. When comparing total blackflies captured/day, the MosqTent® was more efficient than HLC (p = 0.031) with a means of 799.4 blackflies/day versus 217.6 blackflies/day by HLC. The results demonstrated improved performance and high reliability of the MosqTent® compared to the traditional HLC method.
Databáze: OpenAIRE
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