Handroanthus serratifolius produz flores durante a estação seca no bioma Cerrado, e pode ser um importante recurso alimentar para algumas aves. Para espécies de Psittacidae, como Forpus xanthopterygius, flores são importantes itens na sua dieta. Este estudo teve como objetivo caracterizar o comportamento de F.xanthopterygius e avaliar o dano à floração e reprodução de H. serratifolius. Quatro indivíduos de H. serratifolius foram observados durante 60 horas para registrar: tamanho de grupo, tempo e duração de visitas, e o número de flores predadas por F.xanthopterygius. Os grupos que visitaram as plantas tinham de dois a 12 indivíduos. As visitas duraram, em média, 60,31 minutos (±22,29). O tamanho do grupo foi correlacionado ao número predado de flores e foi influenciado pelo número de flores oferecidas. Durante a floração, cada indivíduo de H. serratifolius perdeu aproximadamente 1052 flores por semana.

Handroanthus serratifolius produces flowers during the dry season in the Cerrado biome, and it may be an important food source to some bird species. For Psittacidae species, like Forpus xanthopterygius, flowers are important in their diet. This study intended to characterize the behavior of F.xanthopterygius and evaluate the damage to the flowering and in the reproduction of H. serratifolius. Four individuals of H. serratifolius were observed for 60 hours to register size of groups, the time and duration of visit, and the number of flowers predated by F.xanthopterygius. The groups that visited the plants had between 2 and 12 individuals. The mean time of visits was 60.31 minutes (±22.29). The size of groups was correlated to number of flowers predated and was influenced by number of flowers offered. During the flowering, each H. serratifolius individual loses approximately 1,052 flowers per week.

A Leishmania donovani-complex specific DNA probe was usedto confirm the widespread dissemination of amastigotes in apparently normal skinof dogs with canine visceral leishmaniasis. When Lutzomyia longipalpis were fed on abnormal skin of five naturally infected dogs 57 of 163 (35 per cent) fliesbecame infected: four of 65 flies (6 per cent) became infected when fed on apparently normal skin. The bite of a single sandfly that had fed seven days previouslyon a naturally infected dog transmitted the infection to a young dog from a non-endemic area. Within 22 days a lesion had developed at the site of the infectivebite (inner ear): 98 days after infection organisms had not disseminated throughout the skin, bone marrow, spleen or liver and the animal was still serologically negative by indirect immunofluorescence and dot-enzyme-linked immunosorbent assay. When fed Lu. longipalpis were captured from a kennel with a sick dog known to be infected, 33 out of 49 (67 per cent) of flies contained promastigotes. In contrast only two infections were detected among more than 200 sandflies captured in houses. These observations confirm the ease of transmissibility of L.chagasi from dog to sandfly to dog in Teresina. It is likely that canine VL is the major source of human VL by the transmission route dog-sandfly-human. the Lmet2 DNA probe was a useful epidemiological tool for detecting L. chagasi in sandflies.