Pathological and parasitological characterization of Prosthenorchis elegans in a free-ranging marmoset Callithrix geofroyi from the Brazilian Atlantic Forest / Caracterização patológica e parasitológica de Prosthenorchis elegans em Callithrix geoffroyi primate de vida livre da Mata Atlântica

Prosthenorchis elegans is an acanthocephalan intestinal parasite reported in neotropical primates. Despite parasitism by P. elegans having already been described in wild marmosets in the Brazilian Atlantic Forest, there are no reports of this infection in wild Geoffroy's marmoset (Callithrix geofroyi). The aim of this study is to report one case of P. elegans parasitism in a free-ranging C. geoffroyi from Brazilian Atlantic Forest in Espírito Santo state, and characterize the pathological and parasitological findings of this infection. One Geoffroy's marmoset necropsied at the Vila Velha University's Veterinary Pathology Laboratory presented intense chronic transmural ulcerative enteritis associated with twenty cylindrical helminths present in the jejunum and ileum. We can conclude that parasitism by P. elegans occurs in free-ranging groups of Geoffroy's marmosets. Its infection produced severe intestinal lesions even in free-ranging marmoset and therefore is a threat to this animal's survival in wildlife and can have some impact on primate conservation in the Brazilian Atlantic Forest.(AU)

Prosthenorchis elegans é um acantocéfalo intestinal descrito em primatas neotropicais. Apesar do parasitismo por P. elegans já ter sido descrito de saguis da Mata Atlântica brasileira, não há relatos da infecção em saguis-da-cara-branca (Callithrix geofroyi) de vida livre. O objetivo deste estudo é relatar um caso de parasitismo por P. elegans em um C. geoffroyi de vida livre proveniente da Mata Atlântica brasileira no Estado do Espírito Santo e caracterizar os achados patológicos e parasitológicos dessa infecção. Um sagui-da-cara-branca foi necropsiado no Laboratório de Patologia Veterinária da Universidade de Vila Velha, onde foi observada intensa enterite ulcerativa transmural crônica associada a vinte helmintos cilíndricos presentes no jejuno e íleo. Conclui-se que o parasitismo por P. elegans ocorre em grupos livres de saguis-da-cara-branca e a sua infecção leva a lesões intestinais graves; portanto, este parasita pode prejudicar a sobrevivência deste animal na vida selvagem e pode ter algum impacto na conservação de primatas na Mata Atlântica brasileira.(AU)

Ultrastructural and genetic diversity studies of two sclerocollum [acanthocephala] species infecting siganid and lutianid fishes from the Red Sea, Egypt

Little know about the distribution of Acanthocephala in local waters. A survey was carried out on the commercially important herbivorous Siganid fish, siganus rivulatus and S. lurid-us, as well as Lutianid fish Centropristis filamentosus inhabiting the Red sea to determine the prevalence of Acanthocephala parasites. One hundred and thirteen fish were examined. The infection rates of S. rivulatus and S. luridus with Sclerocollum rubrimaris Schmidt and paperna 1978 [Rhadinorhynchidae: Gorgorhynchinae] were 59% and 33%, respectively. Meanwhile, 59% of C. filamentosus were found infected by Sclerocollum sp. The abundance, host-parasite relationships and microhapitat of S. rubrimaris were investigated and discussed. SEM was the employed to in vestigate the differences between the two species of Sclerocollym. For accurate estimation of genetic diversity of these species, randomly amplified polymorphic DNA [RABD] genomic fingerprinting was proposed, using four different random primers. SEM studies showed that the two examined species differ in the length of proboscis hooks, the number of longitudinal rows of hooks on proboscis, distance between the bases of hooks and in egg size. The trunk surface of Sclero-collum sp. had minute, scale-likespines that were arranged in oplique lines whereas the trunk surface of S. rubrimaris had small pores and sclerotised plates on its anterior portion. RAPD primers revealed 52 amplification products and species-specific markers were identified. The deduced phenogram comprised two main clusters each includes one of the examined Sclero-collum species. Results indicated that RAPD markers are useful for the assessment of genetic diversity between the investigated Sclerocollum species which concur with SEM outcome

Infección humana con Falsifilicollis Sphaerocephalus (Acanthocephala) en Trujillo, Perú / Human infection with Falsifilicollis Sphacrocephalus (Acanthocephala) in Trujillo city, Peru

En el curso de 20 años (1963-1983) se colectó cuatro especímenes de Acanthocephala Rudolphi, 1808; dos de heces humanas y dos del intestino de pacientes sometidos a intervenciones quirúrgicas en el hospital Regional de Trujillo-Perú. Los referidos acantocéfalos fueron identificados como Falsifilicollis sphaerocephalus (Bremser. 1821) parásito normal de aves, que ocurrentemente se registra por primera vez en el hombre