Malaria entomological inoculation rates in gold mining areas of Southern Venezuela
| Autor: | Enrique Pérez, Jorge E. Moreno, Víctor Sánchez, Elisa Páez, Elena Vaccari, Yasmin Rubio-Palis |
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| Rok vydání: | 2009 |
| Předmět: |
Microbiology (medical)
Plasmodium Veterinary medicine lcsh:Arctic medicine. Tropical medicine lcsh:RC955-962 Plasmodium falciparum Plasmodium vivax lcsh:QR1-502 Enzyme-Linked Immunosorbent Assay lcsh:Microbiology man-biting rate Anopheles parasitic diseases medicine Animals Longitudinal Studies entomological inoculation rate biology Anopheles darlingi Inoculation sporozoite rate Venezuela biology.organism_classification medicine.disease Virology Insect Vectors Biting Female Malaria |
| Zdroj: | Memórias do Instituto Oswaldo Cruz, Volume: 104, Issue: 5, Pages: 764-768, Published: AUG 2009 Memórias do Instituto Oswaldo Cruz., Vol 104, Iss 5, Pp 764-768 (2009) |
| ISSN: | 0074-0276 |
| DOI: | 10.1590/s0074-02762009000500017 |
| Popis: | A longitudinal study of malaria vectors aiming to describe the intensity of transmission was carried out in five villages of Southern Venezuela between January 1999-April 2000. The man-biting, sporozoite and entomological inoculation rates (EIR) were calculated based on 121 all-night collections of anophelines landing on humans, CDC light traps and ultra violet up-draft traps. A total of 6,027 female mosquitoes representing seven species were collected. The most abundant species were Anopheles marajoara Galvão & Damasceno (56.7%) and Anopheles darlingi Root (33%), which together accounted for 89.7% of the total anophelines collected. The mean biting rate for An. marajoara was 1.27 (SD + 0.81); it was 0.74 (SD + 0.91) for An. darlingand 0.11 (SD + 0.10) for Anopheles neomaculipalpus Curry and the overall biting rate was 2.29 (SD + 1.06). A total of 5,886 mosquitoes collected by all three methods were assayed by ELISA and 28 pools, equivalent to 28 mosquitoes, yielded positive results for Plasmodium spp. CS protein. An. neomaculipalpus had the highest sporozoite rate 0.84% (3/356), followed by An. darlingi 0.82% (16/1,948) and An. marajoara 0.27% (9/3,332). The overall sporozoite rate was 0.48% (28/5,886). The rates of infection by Plasmodium species in mosquitoes were 0.37% (22/5,886) for Plasmodium vivax(Grassi & Feletti) and 0.10% (6/5,886) for Plasmodium falciparum (Welch). The estimated overall EIR for An. darling was 2.21 infective bites/person/year, 1.25 for An. marajoara and 0.34 for An. neomaculipalpus. The overall EIR was four infective bites/person/year. The biting rate, the sporozoite rate and the EIR are too low to be indicators of the efficacy of control campaigns in this area. |
| Databáze: | OpenAIRE |
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