Phlebotomine sand flies (Diptera: Psychodidae) in the municipality of Várzea Grande: an area of transmission of visceral leishmaniasis in the state of Mato Grosso, Brazil
Mem. Inst. Oswaldo Cruz
;
102(8): 913-918, Dec. 2007. graf, mapas, tab
Article
Dans Anglais
| LILACS
| ID: lil-471855
ABSTRACT
Visceral leishmaniasis (VL) has been naturally transmitted in periurban areas due to the emergence and reemergence of its vectors in such areas. Aimed to further knowledge on ecological aspects affecting the occurrence of phlebotomine sand flies in VL transmission areas in the municipality of Várzea Grande, state of Mato Grosso (MT), Brazil, sand fly captures were carried out. Monthly collections of sand flies were undertaken with CDC light-traps, which were left in both intradomiciliary and peridomiciliary areas of ten residences during four consecutive days between January 2004 and June 2006. Twenty-two species of genus Lutzomyia and one of Brumptomyia were captured. The most abundant species was Lutzomyia longipalpis (65.23 percent), followed by L. evandroi (16.26 percent), L. lenti (7.69 percent), L. whitmani (4.92 percent), L. sallesi (2.34 percent) and L. termitophila (1.32 percent). The highest density of the main VL vector, L. longipalpis, was found in peridomiciliary areas, mostly males. No significant correlation was found between environment (temperature, air relative humidity and rain fall) and phlebotomine density; although a slight increase in sand fly density has been observed in the period following rainfalls, particularly L. longipalpis. No correlation was observed between distribution and density of L. longipalpis, prevalence of human VL cases and the presence of serologically positive dogs. The presence of infected dogs, increased vector density, susceptibility rate and interruption of epidemiological surveillance may raise the risk of VL transmission to man in Várzea Grande.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Psychodidae
/
Vecteurs insectes
/
Leishmaniose viscérale
Type d'étude:
Etude d'étiologie
/
Étude de prévalence
/
Facteurs de risque
Limites du sujet:
Animaux
/
Femelle
/
Humains
/
Mâle
Pays comme sujet:
Amérique du Sud
/
Brésil
langue:
Anglais
Texte intégral:
Mem. Inst. Oswaldo Cruz
Thème du journal:
Médecine tropicale
/
Parasitologie
Année:
2007
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Fiocruz/BR
/
Secretaria Estadual de Saúde de Mato Grosso/BR
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