Wild and synanthropic hosts of Leishmania (Viannia) braziliensis in the endemic cutaneous leishmaniasis locality of Amaraji, Pernambuco State, Brazil

Transactions of the Royal Society of Tropical Medicine and Hygiene
Sinval P Brandão-FilhoJeffrey J Shaw

Abstract

Evidence of Leishmania infection was found in small mammals captured between 1996 and 2000 in the Amaraji region, Pernambuco State, Brazil. The kDNA polymerase chain reaction (PCR), using primers specific for subgenus L. (Viannia), was positive for 43/153 water rats (Nectomys squamipes), 13/81 black rats (Rattus rattus), 15/103 grass mice (Bolomys lasiurus), 1/14 marsh mice (Holochilus scieurus), 2/50 field mice (Akodon arviculoides), 2/12 woolly opossums (Marmosa sp.), and 5/37 common opossums (Didelphis albiventris). This same kDNA PCR was positive for 12/61 dog and 8/58 horse skin samples. In paired PCR tests of 203 small mammals, 18.7% were positive with the kDNA primers and 18.2% with rDNA primers. Amastigotes were seen in 26/460 and L. (V.) braziliensis was isolated from 5 grass mice and 1 black rat. We concluded that small mammals, particularly rodents, are infected with parasites of the subgenus L. (Viannia). The isolation of L. (V.) braziliensis zymodeme IOC/Z74 from 6 rodents and the fact that all the other described L. (Viannia) species that commonly infect humans have never been found in rodents or marsupials leads us to suggest that the positive PCRs indicate infections of L. (V.) braziliensis. The isolation of zym...Continue Reading

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Citations

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