Estimating the abortion risk difference in Neospora caninum seropositive dairy cattle in Brazil

Nicolino, Rafael Romero; Capanema, R.O.; Oliveira, Camila Stefanie Fonseca de; Pastrana, Misael Enrique Oviedo; Lopes, Luciano Bastos; Haddad, João Paulo Amaral

doi:10.1590/0103-8478cr20141428

Cited by 5 publications

(3 citation statements)

References 16 publications

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“…The rate of abortion due to N. caninum infection in dairy cows in Brazil is estimated at 10.04%, corresponding to more than 474,000 abortions per year and resulting in severe economic losses to the dairy industry (NICOLINO et al, 2015). Dubey et al (1997) reported that the detection of anti-N. caninum antibodies in the sera of cows with a history of abortion was evidence of maternal exposure to the protozoan.…”

Section: Resultsmentioning

confidence: 99%

“…Approximately two-thirds of this total (USD 1.58 billion) is related to production losses in dairy cattle (REICHEL et al, 2013). Reichel et al (2013) and Nicolino et al (2015) estimated the costs related to N. caninum infections in Brazil at R$ 291 million and USD 51.3 million, respectively. Therefore, losses due to neosporosis account for approximately 1% of the gross value of dairy production in Brazil, which has high socioeconomic importance.…”

Section: Introductionmentioning

confidence: 99%

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Associação do histórico de abortamento com a presença de anticorpos anti-Neospora caninum em vacas leiteiras

Frigotto¹,

Genz²,

Nino³

et al. 2018

SCA

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Neospora caninum is an important cause of abortions in dairy cattle, leading to severe economic losses. The objective of this study was to determine the association of serum antibodies against N. caninum with a history of abortion in dairy cows. A total of 46 dairy cows from nine dairy farms were evaluated; 28 with a history of one or more abortions and 18 without a history of abortions. Antibodies against N. caninum were detected by indirect immunofluorescence, and the reaction was considered positive when the titer was ?1:50. Serum antibodies against N. caninum were detected in 39.1% (18/46) of all cows, 57.1% (16/28) of cows with a history of abortion, and 11.1% (2/18) of cows without a history of abortion. Among the seropositive cows, 88.9% had a history of abortion. All farms showed at least one animal positive for N. caninum. These results indicate an association between seropositivity for N. caninum and a history of abortion in cows. Cows with a history of abortion were 10.6 times more likely to be seropositive for N. caninum than cows without a history of abortion. Therefore, we concluded that there is an association between a history of abortion and the presence of antibodies against N. caninum in dairy cows.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Associação do histórico de abortamento com a presença de anticorpos anti-Neospora caninum em vacas leiteiras

Frigotto¹,

Genz²,

Nino³

et al. 2018

SCA

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“…For example in South America the annual losses due to Neosporosis for the dairy industry were estimated to be $43. 6 [10,11] In addition to economic losses, some livestock abortigenic agents are zoonotic making them relevant to human health as well. Some of those infectious agents, including Brucella abortus, Rift valley fever, Toxoplasma gondii and Campylobacter among others, can cause fever and abortion in humans.…”

Section: Introductionmentioning

confidence: 99%

Review of the Current Status on Livestock Abortigenic Diseases Surveillance in Africa and Asia

Semango,

Buza

2024

Preprint

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Introduction Livestock abortigenic agents, which are microorganisms that lead to premature foetal death and expulsion before completion of the gestation period, are common in Africa and Asia. Abortion events cause economic losses by lowering reproduction (and hence herd/flock sizes) and effects on milk production. Despite the importance of livestock production for food security and livelihoods of millions of the world’s poorest communities, very little is known about the scale, magnitude or causes of livestock abortion in Africa. The aim of this review was to determine the current status of the burden of livestock abortion and surveillance measures adopted for livestock abortigenic pathogens in Africa and Asia, and to explore feasible surveillance technologies. Methodology A systematic literature search was conducted using Preferred Reporting of Systematic Reviews and Meta-analyses (PRISMA) guidelines in four databases for studies published between 1 Jan 1990 and 31 July 2021 that reported epidemiological surveys of livestock abortigenic pathogens in cattle, goats and sheep in Africa and Asia including; Brucella spp., Neospora caninum, Toxoplasma gondii, Rift valley fever virus, Coxiella burnetii, Chlamydia, Leptospira and Bovine viral Diarrhoea Virus. A meta-analysis was used to estimate the species-specific prevalence of the abortigenic diseases and the region where they were detected. Results In the systematic literature search, 48 full papers were included which in total included 50 species-specific surveillance reports from Africa and 19 from Asia. Adjusted median seroprevalence calculations estimated Brucella at 6.85% (range 1.2-11.6) of 9071 sheep, 3.35% (range 0.90-5.40) of 17,007 goats, 8.95% (range 0.50-63.60) of 171,733 cattle, Neospora at 6.80% (range 6.80 -6.80) of 555 sheep, 10.80 (range 10.80-10.80) of 185 goats, 12.65% (range 3.40- 25.60) of 3775 cattle, Toxoplasma at 27.50% (range 1.40 – 75.90) of 2284 sheep, 32.0% (range 20.00- 64.80) of 1226 goats, 7.50% (range 7.50 - 7.50) of 174 cattle, Coxiella at 9.20 (range 9.20 – 9.20) of 184 sheep, 24.20% (range 24.20-24.20) of 91 goats, 13.80% (range 13.80-13.80) of 217 cattle, Rift valley fever virus at 7.70 (2.40-40.00) of 874 sheep, 20.95 (range 2.50-40.00) of 547 goats, 7.45% (range 3.60-11.30) of 309 cattle, Bovine viral diarrhea virus at 78.90 (range 78.90 – 78.90) of 398 cattle, Leptospira at 70.50 (range 70.50 – 70.50) of 373 cattle and Chlamydia at 6.60 (6.60-6.60) of 803 sheep. We found that most studies, 45 (89%) used serological surveys, 1 (2%) used molecular and 1 (2%) reported to have used Mobile-phone based surveillance approach. Three studies (6.25%) of the 48 included were embedded in the national surveillance programs of the respective countries they were conducted, majority 89% were stand-alone cross-sectional studies. Conclusion In conclusion, livestock abortigenic pathogens are still a burden in many African and Asian countries.

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Cholinesterase as an inflammatory marker of subclinical infection of dairy cows infected by Neospora caninum and risk factors for disease

Appelt

Silva

Cazarotto

et al. 2019

Comparative Immunology, Microbiology and Infectious Diseases

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Estimating the abortion risk difference in Neospora caninum seropositive dairy cattle in Brazil

Cited by 5 publications

References 16 publications

Associação do histórico de abortamento com a presença de anticorpos anti-Neospora caninum em vacas leiteiras

Associação do histórico de abortamento com a presença de anticorpos anti-Neospora caninum em vacas leiteiras

Review of the Current Status on Livestock Abortigenic Diseases Surveillance in Africa and Asia

Cholinesterase as an inflammatory marker of subclinical infection of dairy cows infected by Neospora caninum and risk factors for disease

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