PESQUISA VETERINÁRIA BRASILEIRA

Abstract in English:

ABSTRACT.- Milanelo L., Moreira M.B., Fitorra L.S., Petri B.S.S., Alves M. & Santos A.C. 2009. Occurrence of parasitism by Dioctophyma renale in ring-tailed coatis (Nasua nasua) of the Tiete Ecological Park, São Paulo, Brazil. Pesquisa Veterinária Brasileira 29(12):959-962. Centro de Recuperação de Animais Selvagens, Parque Ecológico do Tietê, Departamento de Águas e Energia Elétrica, Rua Guira Acangatara 70, Engenheiro Goulart, São Paulo, SP 03719-000, Brazil. E-mail: lmilanelo@gmail.com Dioctophymosis is a worldwide renal parasitosis caused by the Dioctophyma renale nematode, which results in progressive destruction of renal tissue. Aquatics annelids are considered the main intermediate hosts and the literature refers as permanent hosts of dogs, wild mammals and even humans. During procedures for population control of coatis (Nasua nasua) in the Ecological Park of Tietê (PET), was noticed the presence of parasitosis by D. renale. From 68 animals, males and females, young and adults, submitted to exploratory laparotomy, 51 were positive for the presence of worms, 9 were found only in the right kidney. In 10 cases, in addition to right kidney parasitism, worms were also observed in the abdominal cavity. In 24 cases D. renale was found only in the abdominal cavity and in 8 animals the right kidney was reduced to a small rigid structure. The study showed that the preferred site for parasitism of the worm, considered erratic, was the abdominal cavity in 66.66% of the cases.

• Dioctophyma renale Nasua nasua dioctofimose

Abstract in Portuguese:

RESUMO.- Milanelo L., Moreira M.B., Fitorra L.S., Petri B.S.S., Alves M. & Santos A.C. 2009. Occurrence of parasitism by Dioctophyma renale in ring-tailed coatis (Nasua nasua) of the Tiete Ecological Park, São Paulo, Brazil. [Ocorrência de parasitismo por Dioctophyma renale em quati (Nasua nasua) do Parque Ecológico Tietê, São Paulo.] Pesquisa Veterinária Brasileira 29(12):959-962. Centro de Recuperação de Animais Selvagens, Parque Ecológico do Tietê, Departamento de Águas e Energia Elétrica, Rua Guira Acangatara 70, Engenheiro Goulart, São Paulo, SP 03719-000, Brazil. E-mail: lmilanelo@gmail.com RESUMO.- [Ocorrência de parasitismo por Dioctophyma renale em quati (Nasua nasua) do Parque Ecológico Tietê, São Paulo.] A dioctofimose é uma parasitose renal causada pelo nematóide Dioctophyma renale conhecida por gerar a destruição progressiva do parênquima renal. Anelídeos de água doce são considerados os principais hospedeiros intermediários e a literatura refere como hospedeiros definitivos cães domésticos, mamíferos selvagens e até seres humanos. Durante procedimentos de controle populacional de quatis (Nasua nasua) no Parque Ecológico do Tietê (PET), evidenciou-se a presença do parasitismo por D. renale. Sessenta e oito animais foram submetidos à laparotomia, machos e fêmeas, jovens e adultos, dos quais 51 foram positivos para presença do parasita. Em 9 animais o parasita esteve presente apenas no rim direito; em 10 animais D. renale parasitava o rim direito e a cavidade abdominal simultaneamente. Em outros 24 quatis o parasita foi encontrado apenas na cavidade abdominal e em 8 animais o rim direito foi reduzido apenas a uma pequena estrutura rígida. O estudo demonstrou que para este hospedeiro (Nasua nasua), o rim direito não parece ser local de escolha do parasita, já que o encontro do verme em 66,6% dos casos foi a cavidade abdominal.

Abstract in English:

ABSTRACT.- Santos S.B., Faccini J.L.H. & Santos A.C.G. 2006. [Seasonal variation of Bovicola caprae parasitizing goats in the State of Paraíba, northeastern Brazil.] Variação estacional de Bovicola caprae parasitando caprinos no Estado da Paraíba. Pesquisa Veterinária Brasileira 26(4):249-253. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: faccini@ufrrj.br The effects of temperature, humidity and rainfall on field population trend of the biting louse Bovicola caprae, parasitizing goats bred in the semiarid region of the State of Paraiba, northeastern Brazil were monthly evaluated from August 1999 to July 2002. In the first two years (August 1999 to July 2001) 30 goats were examined, whereas 16 goats were examined in the last year (August 2001 to July 2002). All goats were crossbred, both sexes and abated for human consumption. The lice were collected in an area 4cm of diameter at three body sites: maxillary, back line and haunch. Spearman correlation analysis was conducted (p< 0.05) between monthly average intensity of infestation of all stages (egg, larva, nymph, male and female) of the life cycle pooled and monthly total counts of each stage and mean temperature, mean relative humidity and rainfall. B. caprae was found throughout the year with prevalence of 75-100%. Increase of the louse population during the drier months was probably a consequence of poor nutrition due to reduced pasture and inadequate husbandry practices instead the influence of abiotic factors.

• Bovicola caprae Trichodectidae Mallophaga seasonal variation goats northeastern Brazil

Abstract in Portuguese:

ABSTRACT.- Santos S.B., Faccini J.L.H. & Santos A.C.G. 2006. [Seasonal variation of Bovicola caprae parasitizing goats in the State of Paraíba, northeastern Brazil.] Variação estacional de Bovicola caprae parasitando caprinos no Estado da Paraíba. Pesquisa Veterinária Brasileira 26(4):249-253. Departamento de Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: faccini@ufrrj.br The effects of temperature, humidity and rainfall on field population trend of the biting louse Bovicola caprae, parasitizing goats bred in the semiarid region of the State of Paraiba, northeastern Brazil were monthly evaluated from August 1999 to July 2002. In the first two years (August 1999 to July 2001) 30 goats were examined, whereas 16 goats were examined in the last year (August 2001 to July 2002). All goats were crossbred, both sexes and abated for human consumption. The lice were collected in an area 4cm of diameter at three body sites: maxillary, back line and haunch. Spearman correlation analysis was conducted (p< 0.05) between monthly average intensity of infestation of all stages (egg, larva, nymph, male and female) of the life cycle pooled and monthly total counts of each stage and mean temperature, mean relative humidity and rainfall. B. caprae was found throughout the year with prevalence of 75-100%. Increase of the louse population during the drier months was probably a consequence of poor nutrition due to reduced pasture and inadequate husbandry practices instead the influence of abiotic factors.

Abstract in English:

Faccini J.L.H., Santos A.C.G. & Bechara G.H. 2004. [Bovine demodicosis in the state of Paraíba, northeastern Brazil.] Demodicose bovina no Estado da Paraíba. Pesquisa Veterinária Brasileira 24(3):149-152. Depto Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: faccini@ufrrj.br Cases of bovine demodicosis caused by Demodex bovis were reported in a Sindhi herd from December 1989 to January 1992. Both localized and generalized forms were diagnosed. This is the first report of the generalized form in Brazil. In the first two years, demodicosis was diagnosed only in cattle < 2 years old, whereas animals of all ages were positive in the last two years. Prevalence varied from 20.4% (11/54) to 53.1% (26/49) and 13.2% (12/91) to 14.8% (9/61) for cattle < 2 years old and > 2 years old, respectively. Clinical signs varied from a few small nodules to a thickened skin with soft large nodules in the localized and generalized forms, respectively. Main microscopic features of the nodules in the generalized form consisted of acanthosis with hyperqueratosis, chronic sebaceous adenitis, subcutaneous muscular necrosis, focal cellular degeneration of the epidermis basal layer and presence of large number of mites inside the lumen of dilated hair follicles. In addition, a chronic perifoliculitis was observed, characterized by lymphoplasmocytic infiltrate which also contained macrophages and neutrophils. It is suggested that poor nutrition and stress due to prolonged drought probably contributed to the increase of susceptibility of the herd to mite infestation.

• Demodex bovis demodicosis cattle pathology Brazil.

Abstract in Portuguese:

Faccini J.L.H., Santos A.C.G. & Bechara G.H. 2004. [Bovine demodicosis in the state of Paraíba, northeastern Brazil.] Demodicose bovina no Estado da Paraíba. Pesquisa Veterinária Brasileira 24(3):149-152. Depto Parasitologia Animal, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, Seropédica, RJ 23890-000, Brazil. E-mail: faccini@ufrrj.br Cases of bovine demodicosis caused by Demodex bovis were reported in a Sindhi herd from December 1989 to January 1992. Both localized and generalized forms were diagnosed. This is the first report of the generalized form in Brazil. In the first two years, demodicosis was diagnosed only in cattle < 2 years old, whereas animals of all ages were positive in the last two years. Prevalence varied from 20.4% (11/54) to 53.1% (26/49) and 13.2% (12/91) to 14.8% (9/61) for cattle < 2 years old and > 2 years old, respectively. Clinical signs varied from a few small nodules to a thickened skin with soft large nodules in the localized and generalized forms, respectively. Main microscopic features of the nodules in the generalized form consisted of acanthosis with hyperqueratosis, chronic sebaceous adenitis, subcutaneous muscular necrosis, focal cellular degeneration of the epidermis basal layer and presence of large number of mites inside the lumen of dilated hair follicles. In addition, a chronic perifoliculitis was observed, characterized by lymphoplasmocytic infiltrate which also contained macrophages and neutrophils. It is suggested that poor nutrition and stress due to prolonged drought probably contributed to the increase of susceptibility of the herd to mite infestation.