RESUMEN
Feeding patterns of mosquitoes in six Brazilian environmental preservation areas were analyzed by the precipitin technique. The mosquito populations were captured using Shannon traps during different time periods. Bird, cow, dog, horse, opossum, human, and rodent antisera diagnostic tests were employed and results were analyzed by calculating the Sørensen similarity index and using the null-model test. Of the 647 analyzed specimens, 443 reacted to the utilized antisera, of which 331 reacted to one blood source, with the most frequent being birds (49.4%); and 112 specimens reacted to two blood sources, with the most frequent combination from birds + rodents (14.3%). The feed profiles demonstrated that Anopheles albitarsis, An. evansae, Aedes fulvus, Psorophora albigenu, Ps. albipes, Ps. ferox, and Mansonia titillans fed predominantly on birds. The similarity index showed that in some localities An. cruzii, Chagasia fajardi, Ae. scapularis, Ae. serratus, Haemagogus leucocelaenus, Ps. albigenu, and Ps. ferox presented similar dietary habits. The null-models test indicated that species from SMSP, INP, CGNP, and THP demonstrated an aggregate pattern, while species from SONP and SBNP showed a random pattern. The mosquitoes fed predominantly on birds, but from an epidemiological standpoint, the eclectic feeding habits were found to be constant among the mosquitoes analyzed.
Asunto(s)
Culicidae/fisiología , Conducta Alimentaria/fisiología , Animales , Brasil , Modelos TeóricosRESUMEN
O objetivo do presente trabalho foi realizar um levantamento para determinar as fontes alimentares de espécies de triatomíneos do comploexo oliverai (Triatoma matogrossensis Leite & Barbosa, 1951, Triatoma williami Galvão, Souza & Lima, 1965, Triatoma guazu Lent & Wygodzinsky, 1979 e Triatoma jurbergi Carcavallo, Galvão & Lent, 1998), em condições experimentais. Esses insetos são invasores de domícilios no estado do Mato Grosso e considerados de importância epidemiológica. A análise do conteúdo estomacal através da técnica de precipitação de especimens demonstrou ecleticismo alimentar para quatro espécies e várias espécies participantes da dieta: aves (49%), roedores (11%), cão (11%) e gambá (9,2%) para Triatomamatogrossensis e Triatoma williami. Triatoma guazu teve 40,8% de preferência por sangue de roedores, seguido de 15% de sangue de aves, 10,8% para sangue de cães e 10,9% para sangue de gambá. Para Triatoma jurbergi houve 35% de preferência por sangue de roedores, seguido de 23% de sangue de aves, 10,9% por sangue de gabá e 9,6% por sangue de cães.
RESUMEN
O objetivo do presente trabalho foi realizar um levantamento para determinar as fontes alimentares de espécies de triatomíneos do comploexo oliverai (Triatoma matogrossensis Leite & Barbosa, 1951, Triatoma williami Galvão, Souza & Lima, 1965, Triatoma guazu Lent & Wygodzinsky, 1979 e Triatoma jurbergi Carcavallo, Galvão & Lent, 1998), em condições experimentais. Esses insetos são invasores de domícilios no estado do Mato Grosso e considerados de importância epidemiológica. A análise do conteúdo estomacal através da técnica de precipitação de especimens demonstrou ecleticismo alimentar para quatro espécies e várias espécies participantes da dieta: aves (49%), roedores (11%), cão (11%) e gambá (9,2%) para Triatomamatogrossensis e Triatoma williami. Triatoma guazu teve 40,8% de preferência por sangue de roedores, seguido de 15% de sangue de aves, 10,8% para sangue de cães e 10,9% para sangue de gambá. Para Triatoma jurbergi houve 35% de preferência por sangue de roedores, seguido de 23% de sangue de aves, 10,9% por sangue de gabá e 9,6% por sangue de cães.
RESUMEN
Here are presented results of blood sucking habit of Chagasia farjadi (Lutz, 1904), in different regions of Brazil, through the test of precipitin of the intestinal content. Fourty four female specimens were analysed in the present study; 70,5% of the specimens reacted to the test and 68,2% were positive to an alimentary source. C. fajardi showed to be eclectic, since its digestive content reacted for the following sources: bird, 11 (25,0%); human, 11 (25,0%); rodent, 4 (9,1%); cow, 2 (4,5%); horse, 2 (4,5%); opossum, 1 (2,3%). The species also demonstrated appreciable anthropophilic what encourages the continuity of the studies.
RESUMEN
Here are presented results of blood sucking habit of Chagasia farjadi (Lutz, 1904), in different regions of Brazil, through the test of precipitin of the intestinal content. Fourty four female specimens were analysed in the present study; 70,5% of the specimens reacted to the test and 68,2% were positive to an alimentary source. C. fajardi showed to be eclectic, since its digestive content reacted for the following sources: bird, 11 (25,0%); human, 11 (25,0%); rodent, 4 (9,1%); cow, 2 (4,5%); horse, 2 (4,5%); opossum, 1 (2,3%). The species also demonstrated appreciable anthropophilic what encourages the continuity of the studies.
RESUMEN
While governmental agencies have controlled the main domiciliated vectors of Chagas disease in some regions of the country, the permanent searching of the so called secondary vectors is very important. They are attracted by light and frequently invade and colonize human dwellings. As future candidates of epidemiological importance, Triatoma jurbergi,species recently described, was found in cracks of erosive rocky hills with Psitacidae nests, sucking blood to rodents and parrots, attacking gold washers in the high and steep banks the river of the Garças in the state of Mato Grosso. We have analyzed the digestive content of 164 specimens and coulddemonstrate its alimentary eclecticism; also, it was proven that had participated of the diet the following sources: rodent 29%; bird 13%; opossum 10%; dog 10% and lizard 4%. We found natural infection with Trypanosoma cruzi- like in 27 specimens (15.5%). Triatoma vandae, another recently described species, was found in human dwellings in the state of Mato Grosso, attracted by light and its habits are still unknown. The analysis of the digestive content through the technique of precipitine of 193 specimens showed alimentary eclecticism and that several sources have participated of the diet: rodent 20.7%; opossum 12%; bird 9%; pig 6%; armadillo 6%; dog 4%, and lizard 3%. Natural infection with T. cruzi- like was found in 31 specimens (1
RESUMEN
While governmental agencies have controlled the main domiciliated vectors of Chagas disease in some regions of the country, the permanent searching of the so called secondary vectors is very important. They are attracted by light and frequently invade and colonize human dwellings. As future candidates of epidemiological importance, Triatoma jurbergi,species recently described, was found in cracks of erosive rocky hills with Psitacidae nests, sucking blood to rodents and parrots, attacking gold washers in the high and steep banks the river of the Garças in the state of Mato Grosso. We have analyzed the digestive content of 164 specimens and coulddemonstrate its alimentary eclecticism; also, it was proven that had participated of the diet the following sources: rodent 29%; bird 13%; opossum 10%; dog 10% and lizard 4%. We found natural infection with Trypanosoma cruzi- like in 27 specimens (15.5%). Triatoma vandae, another recently described species, was found in human dwellings in the state of Mato Grosso, attracted by light and its habits are still unknown. The analysis of the digestive content through the technique of precipitine of 193 specimens showed alimentary eclecticism and that several sources have participated of the diet: rodent 20.7%; opossum 12%; bird 9%; pig 6%; armadillo 6%; dog 4%, and lizard 3%. Natural infection with T. cruzi- like was found in 31 specimens (1