Ovine toxoplasmosis: Seroconversion during pregnancy and lamb birth rate in Uruguayan sheep flocks

Savio, E.; Nieto, Alberto

doi:10.1016/0304-4017(94)00764-8

Cited by 17 publications

(9 citation statements)

References 12 publications

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“…This finding is consistent with a previous study by Caballero-Ortega et al (2008) who reported that large flocks had an approximately 2.23-fold higher risk of having positive cases of T. gondii among aborted animals compared with smaller flocks. Similar results were also observed in Uruguay (Savio and Nieto 1995).…”

Section: Discussionsupporting

confidence: 92%

Ovine and caprine toxoplasmosis (Toxoplasma gondii) in aborted animals in Jordanian goat and sheep flocks

Abu-Dalbouh

Ababneh

Giadinis

et al. 2011

Trop Anim Health Prod

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Two hundred and fifty-five biological samples (106 aborted foetal tissue samples and 149 blood samples from aborted sheep and goats) were collected from 188 animals during the lambing season from September 2009 to April 2010 from the Mafraq region of Jordan. The sampled animals belonged to 93 goat and sheep flocks that had cases of abortion. A total of 169 (66.3%) biological samples were collected from sheep and 86 (33.7%) from goats. Seventy-six (29.8%) biological samples (45 blood and 31 tissue samples) were positive for Toxoplasma gondii by PCR assay. The positive samples were obtained from 43 sheep and 23 goats. The overall toxoplasma-specific prevalence rate was 35.1% (66/188). Forty flocks (43%) had at least one T. gondii PCR-positive animal. The risk factors related to flock health status and farm management that are hypothesized to be associated with T. gondii PCR positivity were also assessed using multiple logistic regressions. The presence of cats (OR = 4.74), a large flock size (OR = 2.76) and the method of disposing the aborted foetuses (OR = 3.77) were all statistically significant (P<0.05) risk factors that were positively associated with toxoplasma positivity in goat and sheep flocks.

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Section: Discussionsupporting

confidence: 92%

Ovine and caprine toxoplasmosis (Toxoplasma gondii) in aborted animals in Jordanian goat and sheep flocks

Abu-Dalbouh

Ababneh

Giadinis

et al. 2011

Trop Anim Health Prod

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“…Higher incidence of toxoplasmosis (64 and 62.5%) were recorded by Dubey et al (1986) and Malik et al (1990) in adult sheep in USA, respectively; while lower incidence of toxoplasmosis (28.5 and 3.6%) were detected by Savio and Nieto (1995) and Dubey and Foreyt (2000) in adult sheep, respectively. .…”

Section: Discussionmentioning

confidence: 77%

Comparison of PCR and Serologic Survey for Diagnosis of Toxoplasmosis in Sheep

Shaapan¹,

Kandil²,

Nassar³

2015

Research J. of Parasitology

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Comparative diagnosis of Toxoplasma gondii infection in sheep were carried out with PCR and some serological assays using 200 blood and serum samples collected from sheep of different ages and sexes slaughtered in the main abattoir in Cairo and Giza, Egypt. PCR showed the higher prevalence of toxoplasmosis (48.5%) followed by the Modified Agglutination Test (MAT) (45.5%) and the Latex Agglutination Test (LAT) (41.0%), while the lowest prevalence was detected with the Indirect Hem-Agglutination Test (IHAT) (38.5%). When the data of the serological tests were compared with that of the PCR, as a reference test for toxoplasmosis, MAT had the highest sensitivity (95.9%) followed by LAT (90.7%) and the lowest sensitivity by IHAT (80.4%). On the other hand IHAT had the highest specificity (91.3%) followed by MAT (88.3%) and the lowest specificity was by LAT (84.5%). The present study adopt PCR and serological survey of T. gondii antibodies in sheep by using more sensitive and specific antigens prepared from isolated T. gondii local strain and the obtained results suggests that MAT alone or with LAT can be used as a highly sensitive screening test followed by PCR as a specific confirmatory test for diagnosis of toxoplasmosis in sheep. Consequently, the high prevalence of sheep toxoplasmosis detected by this study scopes the public health significance of sheep's meat as source of human infection.

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“…Statistical difference between the pre-mating and post-partum seroprevalence is due to the high number of animals that seroconverted during the experimental period. In Uruguay, a similar study conducted by SAVIO & NIETO (1995), reported that only 10.8% of dams were seroconverted during the reproductive period, with only 34.2% weaned lambs.…”

Section: Resultsmentioning

confidence: 85%

The incidence and productive significance of ovine toxoplasmosis in Southern Brazil

Oliveira

Filho

et al. 2016

Cienc. Rural

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This research aimed to determine incidence of Toxoplama gondii infection in Corriedale sheep in southern Brazil during pregnancy and the extent of associated losses. Blood samples were collected from 411 Corriedale sheep in two flocks at different locations in the state of Rio Grande do Sul (Brazil). Presence of T. gondii was diagnosed by the Indirect Fluorescent Antibody Technique (IFAT RESUMO Este trabalho tem como objetivo determinar a incidência da infecção pelo T. gondii em ovinos, durante o período gestacional e a extensão das perdas associadas. Amostras de sangue foram coletadas de 411 ovelhas Corriedale em dois rebanhos, em diferentes locais do Rio Grande do Sul, Brasil. Presença de T. gondii foi diagnosticada pela técnica de imunofluorescência indireta (RIFI). A soroprevalência no pré-acasalamento foi de 20,2%, sem diferença significativa entre os dois rebanhos estudados. A infecção por T. gondii foi influenciada pela idade (P ≤0,05). A soroprevalência no pré-acasalamento não influenciou a taxa de retorno ao estro e a taxa de prenhez. Taxa de desmame foi significativamente maior nas ovelhas positivas na pré-cobertura em comparação com as negativas (87,9 e 74,1%, respectivamente -P<0,05

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Ovine toxoplasmosis: Seroconversion during pregnancy and lamb birth rate in Uruguayan sheep flocks

Cited by 17 publications

References 12 publications

Ovine and caprine toxoplasmosis (Toxoplasma gondii) in aborted animals in Jordanian goat and sheep flocks

Ovine and caprine toxoplasmosis (Toxoplasma gondii) in aborted animals in Jordanian goat and sheep flocks

Comparison of PCR and Serologic Survey for Diagnosis of Toxoplasmosis in Sheep

The incidence and productive significance of ovine toxoplasmosis in Southern Brazil

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