MODELING of Biomphalaria Spp. Preston, 1910 in the State of Espírito Santo, Brazil
Name: RHAYANE FIGUEIREDO RAMOS
Publication date: 13/09/2018
Advisor:
Name |
Role |
|---|---|
| BLIMA FUX | Advisor * |
Examining board:
| Name |
Role |
|---|---|
| BLIMA FUX | Advisor * |
| CRISPIM CERUTTI JUNIOR | Internal Examiner * |
| GUSTAVO ROCHA LEITE | External Examiner * |
Summary: Schistosomiasis mansoni is a parasitic disease caused by Schistosoma mansoni.
The transmission occurs by aquatic mollusks, of the genus Biomphalaria, having
three species of epidemiological importance (Biomphalaria glabrata, Biomphalaria
straminea and Biomphalaria tenagophila). In Brazil, the species Biomphalaria
glabrata is the most important intermediate host, due to its extensive geographical
distribution, high infection rates and infection transmission efficiency.
Schistosomiasis is endemic in 47 of the 78 municipalities of Espirito Santo (ES),
WHERE the most important foci are located in the central and southern regions of the
state; Baixo Guandu and Vale do Rio Doce. Objective: In this work, was analyzed
the predictive distribution of the main species of Biomphalaria and the relationship
with the transmission of schistosomiasis mansoni in the ES state. Materials and
methods: The historical series from 2000 to 2016 were collected by the Center of
Entomology and Malacology of ES State and evaluated by geoclimatic maps.
Nineteen variables were analyzed by WorldClim program, temperature, rainfall,
altitude and slope that was available by IBGE, and soil by EMBRAPA / IBGE. The
ArcGIS and Maxent programs were used to analyze the data and elaborate the
prediction maps. Results: Out of 23,738 samples of Biomphalaria planorbids and
39,808 positive cases of schistosomiasis mansoni were evaluated in the ES state.
These results were obtained from geoprocessing and modeling, which allowed to
conclude that some variables such as temperature and precipitation, are highly
related to the presence of these planorbids in the state. Conclusions: This study
presents, for the first time, the map of the occurrence of schistosomiasis mansoni in
the ES state, proving the association of the distribution depends of the temperature,
precipitation and altitude in addition to identifying the areas of higher probability of
occurrence of Biomphalaria genus.
