Dely Noronha

Helminth parasites of conventionally mantained laboratory mice

The spectrum of intestinal parasites present in the Swiss Webster, C57B1/6 and DBA/2 mice strains from different animal houses was identified and prevalences compared. Three parasites were observed during the course of this study, namely the cestode Vampirolepis nana (Siebold, 1852) Spasskii, 1954 (= Hymenolepis nana) and the nematodes Aspiculuris tetraptera (Nitzsch, 1821) Schultz, 1924 and Syphacia obvelata (Rudolphi, 1802) Seurat, 1916. The scope of this investigation has been widened to also include morphometric data on the parasites, to further simplify their identification, since the presence of helminths in laboratory animals is regarded as a restricting factor for the proper attainment of experimental protocols.

Helminth Parasites of Conventionally Maintained Laboratory Mice: II- Inbred Strains with an Adaptation of the Anal Swab Technique

Worm burdens recovered from inbred mice strains, namely C57Bl/6, C57Bl/10, CBA, BALB/c, DBA/2 and C3H/He, conventionally maintained in two institutional animal houses in the State of Rio de Janeiro, RJ, Brazil, were analyzed and compared, regarding their prevalences and mean intensities. Three parasite species were observed: the nematodes Aspiculuris tetraptera, Syphacia obvelata and the cestode Vampirolepis nana. A modification of the anal swab technique is also proposed for the first time as an auxiliary tool for the detection of oxyurid eggs in mice.

Nematode parasites of Brazilian psittacid birds, with emphasis on the genus Pelecitus railliet & Henry, 1910

In the present paper, some species of nematodes from Brazilian parrots are studied: Aproctapyrrhurae. Ascaridia hermaphrodita, A. sergiomeirai, Pelecitus circularis and P. helicinus. Single female specimens of Pelecitus sp. and Thelazia sp. are presented. The male of P. circularis is fully illustrated, for the first time, since 1884. Ascaridia sergiomeirai is also restudied 59 years after proposition. New host records are estabilished. Remarks on other species of nematodes occuring in psittacid birds are included.

Remarks, on six species of Heterakid Nematodes parasites of brazilian Tinamid birds with description of a new species

Nematodes representing five species of the genus Heterakis, namely: H. inglisi n. sp., H. alata, H. gallinarum, H. spiculatus and one species of the genus Odontoterakis, O. multidentata, were studied. Heterakis inglisi n. sp. closely resembles H. spiculatus, differing from it by smaller size of spicules, precloacal sucker and terminal spike of the tail in the males. Heterakis arquata and H. brasiliana are only listed, for they were not found during the present study. Odontoterakis multidentata is reported in Brazil for the first time. New host records are estabilished for most of the species. These species are fully illustrated.

Camallanus cotti Fujita, 1927 (Nematoda, Camallanoidea) in ornamental aquarium fishes: pathology and morphology

The pathology induced by the nematode Camallanus cotti in the aquarium fishes Beta splendens (beta fish) and Poecilia reticulata (guppy) consisted of gross and microscopic lesions, the former characterized by abdominal swelling with reddish parasites protruding from the anus in both fish hosts and the latter, similar in the beta fishes and guppies, by hemorrhage, congestion, edema, a few glandular elements, and extensive erosion areas in the rectum mucosa, with a marked thickening of the wall and absence of inflammatory infiltrate. Lesions were associated with the presence of several worms attached to the wall or free in the rectal lumen. This is the second reference of the parasite in Brazil and the first report of pathological findings related to this nematode species that is also briefly redescribed and illustrated for the first time on the basis of Brazilian samples.

A survey of new host records for nematodes from mammals deposited in the Helminthological Collection of the Oswaldo Cruz Institute (CHIOC)

In this survey 1,500 samples of nematodes, representing 151 species, distributed in 20 superfamilies, parasitizing Brazilian mammals (Artiodactyla, Carnivora, Chiroptera. Edentata, Lagomorpha, Marsupialia, Perissodactyla, Primates, Rodentia) and deposited between 1916-1963 in the CHIOC were studied. New host records were established for 52 Parasite species distributed in 15 superfamilies, adding new data to previous reports of mammalian nematodes in Brazil.

Helminths of the guinea pig, Cavia porcellus (Linnaeus), in Brazil

Worm burdens were evaluated and compared in two groups of the guinea pig, Cavia poreellus (Linnaeus, 1758): animals of the first group were conventionally maintained in an institutional animal house and those of the second group were openly kept in pet shops in Brazil. Animals from both sources were infected only with the nematode Paraspidodera uncinata (Rudolphi, 1819) Travassos, 1914 (10% of prevalence in guinea pigs from lhe institutional facility and 40% in those animals from the pet shop). Other helminth samples recovered from Brazilian guinea pigs during 52 years and that are deposited in the Helminthological Collection of the Oswaldo Cruz Institute (CHIOC) were also analyzed. Paraspidodera uncinata and the cestode Monoecocestus parcitesticulatus Rego, 1960 were identified in these samples.

Coleções particulares incorporadas à Coleção Helmintológica do Instituto Oswaldo Cruz (CHIOC). I: Coleção do Instituto Pasteur de São Paulo

This paper deals with data on the historical background of the first private helminth survey incorporated to an institutional helminthological collection in Brazil. The samples are represented by nematodes, digenetic trematodes and acanthocephalans recovered from vertebrate hosts, that are included in a check list.

Nematode parasites of Brazilian piciformes birds: a general survey with description of Procyrnea anterovulvata n. sp. (Habronematoidea, Habronematidae)

Thirty species of nematodes recovered from Piciformes hosts are reported. Procyrnea anterovulvata n. sp. from Chelidoptera tenebrosa brasiliensis is described and compared to P. colaptes and P. pileata. The considered morphometric parameters are mainly related to the ratio between length of the body/distance of the vulva to the anterior end. It is approximately 1:0.5 in P. colaptes and P. pileata compared to 1:0.1 in the new species. The male of Synhimantus (Dispharynx) crassissima is described for the first time. Thelazia (Thelaziella) spizaeti is revalidated and new records are reported for some species.

Nematode parasites of Brazilian Ciconiiformes Birds: a general survey with new records for the species

This report deals with the identification of one hundred and fifty-nine samples of nematodes recovered from Brazilian egrets and herons. Contracaecum microcephalum, C. multipapillatum, C. plagiaticium, Desportesius invaginatus, D. longevaginatus, Desmidocercella ardeae, Eustrongylides ignotus, Porrocaecum reticulatum, Tetrameres micropenis, Capillaria sp., Contracaecum sp., Porrocaecum sp., Procyrnea sp., Tetrameres sp. and Viktorocara sp. were studied. The genus Viktorocara and the species C. microcephalum, C. plagiaticium, D. invaginatus, D. ardeae and P. reticulatum are referred in Brazil for the first time.