Fascioliasis problems in ruminants in Rio Grande do Sul, Brazil

Ueno, Hakaru; Gutierres, V. C.; Mattos, Mary Jane Tweedie de; Múller, G. L.

doi:10.1016/0304-4017(82)90041-3

Cited by 15 publications

(12 citation statements)

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“…It could also be due to the irrigation areas from both municipalities because they are prepared for agricultural activities (INEGI 1994). Here, the existence of irrigation channels in all prairie allows the development of the life cycle of F. hepatica (Over 1982;Ueno et al 1982).…”

Section: Discussionmentioning

confidence: 99%

Prevalence of Fasciola hepatica (ELISA and fecal analysis) in ruminants from a semi-desert area in the northwest of Mexico

et al. 2007

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The aim of the present study was to estimate the prevalence of Fasciola hepatica in cattle, goats and sheep from the municipalities of Guaymas and Cajeme, Sonora State, Mexico using the indirect ELISA and Benedeck's sedimentation tests. A total of 2,936 serum and fecal samples from 1,346 bovines, 1,199 goats and 381 sheep were analyzed. Other parameters such as breed and age were also taken into consideration. The results indicated a moderate percentage of prevalence for fasciolosis in these municipalities. In bovines, a prevalence of 11.4 +/- 0.9 was found using the sedimentation test and 24.4 +/- 1.2 for the indirect ELISA. In goats, a prevalence of 24.5 +/- 1.2 was found for the fecal analysis and 43 +/- 1.5 for the indirect ELISA. In sheep, the prevalence for both tests was 19.4 +/- 2.0 and 30.6 +/- 2.7, respectively. Results showed a greater proportion of positive animals when the ELISA test was used than when the Benedeck's sedimentation test was applied. Moderate agreement was observed between both laboratory tests for the three species of ruminants included in the study (Cohen's kappa, K; cattle K=0.527, goats K=0.541 and sheep K=0.539).

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Section: Discussionmentioning

confidence: 99%

Prevalence of Fasciola hepatica (ELISA and fecal analysis) in ruminants from a semi-desert area in the northwest of Mexico

et al. 2007

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“…Also the paddocks are frequently flooded favoring the spread and maintenance of the snails throughout the year (Müller et al 1999). In Brazil this region has the highest percentage of liver condemnation by fasciolosis at slaughterhouses, varying from 18.6% (Dutra et al 2010) to 19.6% (Cunha et al 2007) in cattle, and from 2.27% to 14.57% in sheep (Ueno et al 1982, Cunha et al 2007.…”

Section: Discussionmentioning

confidence: 99%

“…In southern Brazil, the rate of liver condemnation at slaughter due to infection by F. hepatica varies from 18.6% to 19.6% in cattle and 2.27% to 14.57% in sheep (Ueno et al 1982, Cunha et al 2007, Dutra et al 2010. The Patos, Mirim, and Mangueira lakes and a flat topography with wetlands used to irrigated rice fields contribute to the dissemination and maintenance of a high frequency of flukes throughout the year in the southeast region of the Rio Grande do Sul state (Cunha et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Acute fasciolosis in cattle in southern Brazil

Adrien

Schild²,

Marcolongo-Pereira

et al. 2013

Pesq. Vet. Bras.

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Pesq. Vet. Bras. 33(6) This study describes the epidemiological and pathological aspects of an outbreak of acute fasciolosis in cattle in southern Brazil. Fifteen out of 70 three-year-old pregnant cows lost weight in the 30-40 days prior to calving. Clinical signs included diarrhea, weakness, mild anemia and jaundice. Dark yellow fluid in the abdominal cavity was observed at necropsy. Fibrin and clotted blood were adhered to the pericardium and lung, primarily in the diaphragmatic lobes. The liver was enlarged, and the capsular surface was irregular with clear areas and petechiae. At the cut surface, the liver was irregular, firm and edematous, and several hemorrhagic channels could be observed. Areas of fibrosis through the parenchyma and whitish thrombi occluding the great vessels were also observed. The livers of 10 cows that not died were condemned at slaughter for lesions of fasciolosis similar to those observed at necropsy. Microscopically, the liver showed areas of coagulation necrosis, extensive hemorrhages in the streaks or foci and disruption of the parenchyma with neutrophil and eosinophil infiltration. Fibrosis and bile duct proliferation were also observed. Immature Fasciola hepatica flukes were observed in the parenchyma surrounded by degenerated hepatocytes, neutrophils, eosinophils, and hemorrhages. The outbreak occurred on a farm located in an area endemic for fasciolosis, although the acute form of the disease is not common in cattle in this region. It is likely that the cows were infected by F. hepatica metacercariae released in the late fall or early spring in the rice stubble where the herd was grazing prior to calving. Although mortality due to fasciolosis in cattle is infrequent, outbreaks can occur and treatments that are effective in both the immature and adult forms of the parasite should be administered to prevent economic losses.

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“…The states of Rio Grande do Sul (Ueno et al 1982), Paraná and São Paulo (França 1967), Rio de Janeiro and Minas Gerais (De Rezende 1979), and Santa Catarina (Serra Freire & Nuernberg 1992) are the most important endemic areas in our country.…”

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confidence: 99%