Incidência e transmissão transplacentária de Neospora caninum em fêmeas primíparas da raça Bos indicus abatidos em Presidente Prudente, São Paulo, Brasil

Vianna, Luis Carlos; Sartor, Izidoro Francisco; Pituco, Edviges Maristela; Okuda, Líria Hiromi; Camargo, Clarice Neves; Kronka, Sérgio do Nascimento

doi:10.5433/1679-0359.2008v29n2p387

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…Significantly, some previous surveys also recorded a very high rate of congenital transmission in seropositive cows as 94% (French et al, 1999), 36.8% (Vianna et al, 2008), 67.53% (Andreotti et al, 2010), and 55.5% as reported by Lagomarsino et al (2019).…”

Section: Discussionmentioning

confidence: 80%

Neosporosis: a neglected abortifacient disease in Egypt, seroprevalence and farmers’ knowledge, attitudes and practices

Gaber

Hegazy

Oreiby

et al. 2021

J Hellenic Vet Med Soc

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Neosporosis has emerged as a serious disease of cattle and dogs worldwide, causing abortions, neonatal mortalities and massive economic losses in dairy herds. The current study aimed to investigate the burden of Neospora (N.) caninum infection among cows that aborted and to assess knowledge, attitudes, and practices (KAPs) of farmers toward neosporosis in Kafrelsheikh governorate, Egypt. A total of 92 cows that aborted and 25 heifers born from cows that aborted and seropositive for N. caninum infection from 15 dairy herds in different districts of Kafrelsheikh governorate were examined serologically against N. caninum infection using ELISA. A structured questionnaire was built and distributed to 41 farmers in the study area. The overall seroprevalence of N. caninum infection among the examined cows that aborted was 38.04% (35/92). On the other hand, the prevalence of N. caninum infection among the 25 examined heifers born from seropositive cows that aborted was 28% (7/25). The KAPs analysis showed that farmers lack the required information on N. caninum infection and its consequences on dairy farms. The farmers performed risky practices which are responsible for disease entrance and spread on the farm; buy and keeping animals after abortion as well as their heifers. In addition, risk management practices were widespread in dairy farms such as: free movement of dogs, especially stray ones, in 100% of the farms, dogs were able to access and defecate in cattle feed and drinking water sources and had the chance to eat placentas and abortion materials. The current study points out neosporosis as a neglected cause of abortion among cattle in Kafrelsheikh governorate, as well as there is a lack of knowledge and risky practices by the local farmers. These findings may be extrapolated to nearby areas and countries of the same cattle husbandry practices, and veterinary services in such countries should consider neosporosis in their surveillance and control programs.

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Section: Discussionmentioning

confidence: 80%

Neosporosis: a neglected abortifacient disease in Egypt, seroprevalence and farmers’ knowledge, attitudes and practices

Gaber

Hegazy

Oreiby

et al. 2021

J Hellenic Vet Med Soc

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“…Observou-se que 85% (17/20) das fazendas avaliadas apresentaram pelo menos um animal reagente. Fato esse que alerta a região, uma vez que, a neosporose pode ser a causa de distúrbios reprodutivos presentes no rebanho da região e pode estar sendo subestimada, por cursar com parte significante de animais assintomáticos, embora, estejam cronicamente afetados (Vianna et al, 2008). A distribuição dos bovinos soro reagentes no município de Tiros encontra-se detalhada na figura 1.…”

Section: Resultsunclassified

“…Por ser uma doença de caráter de polimorfismo clínico, e na maior parte dos casos cursar de forma inaparente, estima-se que no Brasil, os prejuízos econômicos causados pela neosporose sejam superiores à brucelose e leptospirose, que também são doenças abortivas (Vianna et al, 2008). Os métodos de diagnóstico mais utilizados na rotina são os métodos indiretos, que verificam a presença de anticorpos anti-N. caninum no soro dos hospedeiros, sendo comumente empregados o teste de imunofluorescência indireta e o teste do ensaio imuno enzimático Enzyme-Linked Immunosorbent Assay (ELISA) (Carvalho et al, 2014).…”

Section: Introductionunclassified

Detección de anticuerpos anti-Neospora caninum en ganado lechero en el municipio de Tiros, MG

Bessa¹,

Dias²,

Cruvinel³

et al. 2020

Pubvet

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Resumo.A neosporose é considerada uma das principais doenças causadoras de aborto na bovinocultura leiteira mundial. O agente etiológico é o Neospora caninum e pode causar distúrbios reprodutivos e neurológicos. Objetivou-se detectar anticorpos anti-Neospora caninum em fêmeas bovinas, no município Tiros, MG, bem como, estabelecer os possíveis fatores de risco envolvidos. Foram coletadas 100 amostras de soro sanguíneo de fêmeas bovinas, provenientes de 20 propriedades rurais distintas com diagnóstico fundamentado na sorologia por Enzyme-Linked Immunosorbent Assay (ELISA). Realizou-se análise estatística descritiva (frequências absoluta e relativa) e determinação de fatores de risco pelo teste não paramétrico Odds Ratio para duas amostras independentes, considerando um nível de significância de 5%. A ocorrência detectada foi de 36% (36/100). O fator de risco identificado foi ausência de assistência do médico veterinário (P < 0,0451). Todas as propriedades (100%, 20/20) avaliadas apresentavam histórico recente de alterações reprodutivas, como aborto, repetição de cio e/ou retenção de anexos fetais, com isso, fazem-se necessários estudos epidemiológicos que visem identificar os possíveis agentes etiológicos envolvidos para minimizar possíveis impactos econômicos, bem como, a atuação permanente e vigorosa do médico veterinário nas propriedades rurais do município.

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“…Heifers born from miscarried cows revealed increased prevalence rate to N. caninum and the seropositive rate was at 28% (Gaber et al, 2021). Also, a higher prevalence of congenital transfer of N. caninum in seropositive cattle was at 94% (French et al, 1999), 67.53% (Andreotti et al, 2010), 36.8% (Vianna et al, 2008), and 55.5% (Lagomarsino et al, 2019).…”

Section: Mode Of Transmissionmentioning

confidence: 97%

Neosporosis in Farm Animals

Zaghawa¹,

Elgendy²,

Nayel³

et al. 2023

Journal of Current Veterinary Research

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Neospora caninum was thought to be the parasitic agent causing bovine abortion and newborn mortality in Norway's dogs as well as other countries. Cyst-producing protozoan parasite; Neospora caninum, that have two reproductive stages during its life cycle include asexual stage occurs in a broad intermediate host range includes (cattle, buffalo, sheep and goat) and a sexual stage which occurs in different Canids species is the cause of the disease. It is transferred from the definitive host to the intermediate hosts directly by direct contact with dogs or indirectly through contamination of their feed by dogfeces. Other animals may share in the complete life cycle like birds and rodents. In farm animal, it can spread vertically via transplacental transfer from the dam to the fetus or horizontally by consumption of oocysts that the hosts disseminated with their feces. It causes storm of abortions, stillbirths, infertility, and loss of milk production, which lead to great economic losses. In addition, the Neospora caninum antibodies in dogs were detected all over the world. Additionaly Neospora caninumis a possible cause of canine neuromuscular paralysis. N. caninum in seropositive animals could be detected by numerous techniques including, indirect fluorescent antibody technique, enzyme-linked immunosorbent assay(ELISA), the direct agglutination technique and immunoblotting. Many restrictions are undergone to control neosporosis wide distribution among animals and consequently its economic loses. It has been concluded that the main methods useful for control of Neospora caninum include good farm biosecurity, therapy and vaccination. The current review focused on a broad overview of Neospora caninum in farm animals.

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Incidência e transmissão transplacentária de Neospora caninum em fêmeas primíparas da raça Bos indicus abatidos em Presidente Prudente, São Paulo, Brasil

Cited by 6 publications

References 16 publications

Neosporosis: a neglected abortifacient disease in Egypt, seroprevalence and farmers’ knowledge, attitudes and practices

Neosporosis: a neglected abortifacient disease in Egypt, seroprevalence and farmers’ knowledge, attitudes and practices

Detección de anticuerpos anti-Neospora caninum en ganado lechero en el municipio de Tiros, MG

Neosporosis in Farm Animals

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