Doenças neurológicas de ovinos na região central do Rio Grande do Sul

Rissi, Daniel R.; Fighera, Rafael A.; Irigoyen, Luiz Francisco; Kommers, Gláucia D.; Barros, Claudio S.L.

doi:10.1590/s0100-736x2010000300006

Cited by 9 publications

(14 citation statements)

References 22 publications

(25 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The most significant lesions occurred in the brainstem, and were found unilaterally and characterized mainly by microabscesses, areas of malacia, and perivascular cuffs, similar to what has been observed in cattle (Sanches et al 2000, Oevermann et al , Margineda et al 2012, goats (Rissi et al 2006, Headley et al 2013, and sheep (Rissi et al 2010, Headley et al 2013.…”

Section: Discussionsupporting

confidence: 73%

“…In Brazil, the encephalitic form of listeriosis in ruminants has already been described in cattle (Sanches et al 2000, Konradt et al 2017, goats (Rissi et al 2006, Guedes et al 2007, Konradt et al 2017, and sheep (Mendes et al 2005, Ribeiro et al 2006, Guedes et al 2007, Rissi et al 2010, Konradt et al 2017, but this form of the disease has not been reported in buffaloes to date. Therefore, this study aimed to describe an outbreak of listeric meningoencephalitis in buffaloes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nervous form of listeriosis in buffaloes

et al. 2019

View full text Add to dashboard Cite

Listeriosis is a disease that affects several animal species, including humans, and has three different forms of presentation: encephalic, reproductive, or septicemic. The nervous form is caused mainly by the bacterium Listeria monocytogenes. In Brazil, this disease has already been described in sheep, goats, and cattle. There are no reports of the disease in buffaloes in Brazil and worldwide. The objective of this study was to describe an outbreak of listeric meningoencephalitis in buffaloes in the state of Pará, Brazil. The outbreak occurred in a property located in the municipality of Bujaru, in the eastern Amazon, from May to July 2016. In a herd of 47 buffaloes, three animals (Cases 1, 2 and 3), aged <40 days, presented a neurological condition with locomotion difficulty characterized by paralysis of the four limbs, hypoesthesia, lateral recumbency, and death. Morbidity was 6.38% and lethality was 100%. At necropsy, no significant macroscopic lesions were found. Samples of the central nervous system were collected, fixed in 10% buffered formalin, and routinely processed for histopathological analysis. The main microscopic changes observed were unilateral microabscesses in the brainstem composed predominantly of mononuclear cells, with fewer polymorphonuclear cells, and perivascular cuffs composed mostly of mononuclear cells and few neutrophils. Samples of Cases 1 and 2 revealed Gram-positive bacteria in the areas of necrosis by the Gram’s stain technique. Samples of Case 1 were positive in immunohistochemistry for L. monocytogenes. Diagnosis of the nervous form of listeriosis was based on epidemiological data, clinical profile, and immunostaining for Listeria monocytogenes. Results showed that listeriosis should be considered in the differential diagnosis in buffaloes with nervous signs.

show abstract

Section: Discussionsupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Nervous form of listeriosis in buffaloes

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Nos estudos de casuística das doenças neurológicas realizados no Brasil, a raiva sempre é apontada como a principal enfermidade do SNC nos bovinos (Sanches et al 2000, Galiza et al 2010, Ribas et al 2013 e uma das principais nos equídeos (Lima et al 2005, Pimentel et al 2009). O mesmo não é verdadeiro para os ovinos e caprinos, nos quais a doença é observada em número pequeno de casos (Lima et al 2005, Guedes et al 2007, Rissi et al 2010. Também no PR, estudo prospectivo sobre o diagnóstico diferencial de doenças neurológicas em 136 bovinos, realizado entre 2009 e 2012, revelou que 38% dos animais (n=51) apresentavam encefalite, causada principalmente pelo vírus da raiva (n=16) e por BoHV-5 (n=20) (Queiroz et al 2013).…”

Section: Resultsunclassified

Epidemiologia descritiva da raiva dos herbívoros notificados no estado do Paraná entre 1977 e 2012

Dognani¹,

Pierre²,

Silva³

et al. 2016

Pesq. Vet. Bras.

View full text Add to dashboard Cite

RESUMO.-Realizou-se estudo epidemiológico descritivo da raiva dos herbívoros no estado do Paraná entre os anos de 1977 e 2012. Os casos confirmados de raiva e o total de amostras de encéfalo encaminhadas para o diagnóstico foram distribuídos por espécie, por ano, por meses, por mesorregião geográfica e por municípios, aplicando-se o teste de Qui-quadrado para verificar se havia associação com esses fatores. Modelo probabilístico foi ajustado à sé-rie histórica para verificação de padrões cíclico ou sazonal. Comprovou-se que a raiva é uma doença endêmica no PR, com ocorrência variável entre os anos, sem padrão sazonal e com ciclicidade aparente a cada 18 anos, acometendo, sobretudo, bovinos (86,9%) e equídeos (11,3%). Verificou--se grande difusão no estado (47,6% dos municípios), e a maior expansão geográfica aconteceu na última década. A descriptive epidemiological survey of rabies in herbivorous reared in the state of Parana, Brazil, was carried out from 1977 to 2012. The positive cases and the total number of brain samples processed for diagnostic purposes were distributed according to species, year, month, geographical region and municipality. Chi-square test was used to verify if rabies was associated to these factors. Probabilistic model was applied to historical series in order to verify cyclic and seasonal patterns. In Parana, rabies is an endemic disease with variable yearly occurrence, without seasonal pattern and with a possible cyclic pattern every 18 years. Cattle (86.9%) and equides (11.3%) were mainly affected. Rabies was registered in 47.6% of all municipalities, indicating a great spread of this disease in Parana, mainly during the last decade. Middlewest and Curitiba regions, followed by Pioneer North and West regions, were the areas of most occurrence. The number of cases per municipality was weakly correlated with the number of shelters for Desmodus rotundus (r=0.469; p<0.0001). Therefore, we suggest that annual immunization of cattle and equides should be applied in the high occurrence areas (Middlewest and Curitiba regions) and encouraged in intermediate occurrence areas (Pioneer North and West regions).

show abstract

“…In sheep, the main predisposing factor previously described is caudectomy, which favors ascending bacterial infections and culminate with spinal cord meningomyelitis and abscesses (Rissi et al 2010). According to Kessell et al (2011), young animals less than one year-old are more frequently affected by cerebral abscesses than adult ruminants, differing from the present study, which has found that cerebral abscesses affected mainly adult ruminants.…”

Section: Discussionmentioning

confidence: 99%

“…The main inflammatory neurological diseases caused by bacteria in ruminants are: listeriosis, suppurative leptomeningitis and meningoencephalitis, cerebral and spinal cord abscesses, basilar empyema and neurotuberculosis (Loretti et al 2003, Rissi et al 2010, Câmara et al 2014, Konradt et al 2016. CNS may be affected by infectious agents through four paths: from hematogenous or lymphatic dissemination deriving from distant sites (Morin 2004, Stöber 2005; direct penetrating lesions; through an adjacent suppurative lesion; or centripetal ascending infection through peripheral nerves 2006, Radostits et al 2007.…”

Section: Introductionmentioning

confidence: 99%

Suppurative infectious diseases of the central nervous system in domestic ruminants

et al. 2017

View full text Add to dashboard Cite

RESUMO.-[Doenças infecciosas supurativas do sistema nervoso central de ruminantes domésticos.]Neste trabalho são descritas as doenças neurológicas infecciosas supurativas de ruminantes domésticos na Região Sul do Brasil. Foram avaliados laudos de 3.274 bovinos, 596 ovinos e 391 caprinos, dos quais 219 bovinos, 21 ovinos e sete caprinos foram diagnosticados como doenças inflamatórias no sistema nervoso central. As doenças neurológicas infecciosas supurativas corresponderam a 54 casos (28 bovinos, 19 ovinos e sete caprinos). As enfermidades observadas foram meningoencefalite por Listeria monocytogenes (oito ovinos, cinco caprinos e quatro bovinos), leptomeningite e meningoencefalite supurativa (14 bovinos, dois caprinos e um ovino), abscessos cerebrais (seis bovinos e dois ovinos) e medulares (sete ovinos); e empiema basilar (quatro bovinos e um ovino This study describes suppurative infectious diseases of the central nervous system (CNS) in domestic ruminants of southern Brazil. Reports from 3.274 cattle, 596 sheep and 391 goats were reviewed, of which 219 cattle, 21 sheep and 7 goats were diagnosed with central nervous system inflammatory diseases. Suppurative infectious diseases of the CNS corresponded to 54 cases (28 cattle, 19 sheep and 7 goats). The conditions observed consisted of listerial meningoencephalitis (8 sheep, 5 goats and 4 cattle), suppurative leptomeningitis and meningoencephalitis (14 cattle, 2 goats and 1 sheep), cerebral (6 cattle and 2 sheep), and spinal cord (7 sheep) abscesses, and basilar empyema (4 cattle and 1 sheep). Bacterial culture identified Listeria monocytogenes (9/54 cases), Escherichia coli (7/54 cases), Trueperella pyogenes (6/54 cases) and Proteus mirabilis (1/54 cases). All cases diagnosed as listeriosis through histopathology yielded positive immunostaining on immunohistochemistry, while 12/17 of the cases of suppurative leptomeningitis and meningoencephalitis presented positive immunostaining for Escherichia coli. Meningoencephalitis by L. monocytogenes was the main neurological disease in sheep and goats, followed by spinal cord abscesses in sheep. In cattle, leptomeningitis and suppurative meningoencephalitis was the most frequent neurological disease for the species, and E. coli was the main cause of these lesions. Basilar empyema, mainly diagnosed in cattle, is related to traumatic injuries, mainly in the nasal cavity, and the main etiologic agent was T. pyogenes.

show abstract

Doenças neurológicas de ovinos na região central do Rio Grande do Sul

Cited by 9 publications

References 22 publications

Nervous form of listeriosis in buffaloes

Nervous form of listeriosis in buffaloes

Epidemiologia descritiva da raiva dos herbívoros notificados no estado do Paraná entre 1977 e 2012

Suppurative infectious diseases of the central nervous system in domestic ruminants

Contact Info

Product

Resources

About