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Previous issue date: 2012-02-28 === Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES === Parasites can affect the physical condition, survival and reproduction of birds may be an
important factor in the life history of the host, exerting strong pressure ecological and
evolutionary. Among the most important parasites affecting passerine birds, Isospora species
were included, and the oocysts counts were used for estimating infection in wild birds as well
as essential for studies of prevalence, diagnosis and control of coccidiosis in birds from
seizures of wild animals, and keeping under quarantine at Wild Animal Sorting Center and
latter for the release. This study aimed to determine the circadian rhythm or periodicity in the
elimination of oocysts of Isospora species in Passeriformes, and identify the species of
parasite found and verify the effectiveness and prophylaxis of anticoccidial drugs during the
quarantine period. In a total of 1393 fecal samples were collected from birds of the order
Passeriformes belonging to different families and species, from the apprehensions of wild
animals and sent to CETAS (Wild Animal Sorting Center)/IBAMA at Municipality of
Serop?dica in the State of Rio de Janeiro. After a period of sporulation, the samples were
subjected to centrifugal flotation technique with sucrose, quantified and the results expressed
in OoPD (oocysts per defecation). The results showed that, regardless of the continent where
the birds live, photoperiod is an important factor in maintaining the schedule for the
elimination of oocysts of the genus Isospora. Birds of several families had an OoPD means,
in relationship of shedding oocysts in the feces, the highest eliminations is in the afternoon.
For control of coccidiosis in these birds, throughout the use of anticoccidial drugs were
observed that the effectiveness may vary with the species of the parasite and the birds,
because they have different feeding habits and behavior, which may influence the response to
treatment === Os parasitos podem afetar a condi??o f?sica, sobreviv?ncia e reprodu??o das aves, podendo
ser um importante fator na hist?ria de vida do hospedeiro, exercendo forte press?o ecol?gica e
evolucion?ria. Dentre os parasitos mais importantes que afetam os Passeriformes podemos
citar os cocc?dios do g?nero Isospora, e a estimativa da infec??o em p?ssaros silvestres ?
essencial para os estudos de preval?ncia, diagn?stico e controle deste cocc?dio nas aves
oriundas de apreens?es do tr?fico de animais silvestres, encaminhadas e mantidas sob regime
de quarentena nos centros de triagem de animais silvestres e destinadas ? soltura. Este
trabalho teve por objetivo, determinar o ritmo circadiano ou periodicidade na elimina??o de
oocistos de Isospora spp. em Passeriformes, assim como identificar as esp?cies do parasito
encontradas e verificar a efic?cia dos anticocc?dios na profilaxia durante o per?odo de
quarentena. Foram coletadas 1393 amostras fecais de aves da ordem Passeriformes
pertencentes ? diversas fam?lias e esp?cies, oriundas da apreens?es do tr?fico de animais
silvestres e encaminhadas ao CETAS/IBAMA, Serop?dica, RJ. Ap?s um per?odo de
esporula??o, as amostras foram submetidas a t?cnica de centr?fugo-flutua??o com sacarose,
quantificadas e os resultados expressos em OoPD (oocistos por defeca??o). Os resultados
demonstraram que independentemente do continente onde as aves habitam, o fotoper?odo ?
um fator importante na manuten??o da periodicidade da elimina??o dos oocistos de Isospora
spp. e os Passeriformes de diversas fam?lias apresentaram um valor m?dio de OoPD mais
elevado no per?odo da tarde. Foi verificado o controle da coccidiose nestes p?ssaros atrav?s
do uso de anticocc?dios e observou-se que a efic?cia pode variar de acordo com a esp?cie do
parasito e dos p?ssaros, os quais apresentam h?bitos comportamentais e alimentares
diversificados que podem influenciar na resposta ao tratamento.
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