Leptospira spp. em bovinos leiteiros do estado do Maranhão, Brasil: frequência, fatores de risco e mapeamento de rebanhos reagentes

Paixão, Adriana Prazeres; Santos, H. P. dos; Alves, Lúcia Maria Coelho; Pereira, H. de M.; Carvalho, Robert Ferreira Barroso de; Filho, Valter Marchão Costa; Oliveira, Emerson Antônio Araújo de; Soares, Diego Moraes; Beserra, Priscila Alencar

doi:10.1590/1808-1657001022014

Cited by 12 publications

(18 citation statements)

References 15 publications

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“…Apesar dos resultados aqui encontrados, estes foram inferiores aos observados em um estudo realizado no litoral do Piauí [24], que revelou 52,9% de animais reagentes a Leptospira spp., tal fato pode estar relacionado à variedade de fatores intrínsecos e extrínsecos que influenciam na ocorrência da doença, como as condições climáticas e ambientais distintas das microrregiões estudadas, em que o clima tropical úmido da região litorânea poderia favorecer a sobrevivência de leptospiras no ambiente, quando comparado ao clima tropical semiárido da microrregião de Floriano. Do mesmo modo, o trânsito de animais mais frequente no litoral do Piauí, contribui como fonte permanente de infecção aos animais susceptíveis, como também, em aglomerações de animais em exposições e leilões, eventos muito comuns na região [28].…”

Section: Discussionunclassified

“…Observou-se que a variável retenção de placenta apresentou valor estatisticamente significativo na análise univariada de risco para os animais, embora não tenha sido demonstrada associação com o aborto. Na leptospirose, a retenção de placenta, geralmente, acompanha o aborto e está associada à infecção pelos sorovares Hardjo, Wolffi e Pomona [28].…”

Section: Discussionunclassified

“…No entanto, sua identificação nos rebanhos geralmente está associada à presença de equinos (Castellonis) e suínos (Pomona), os quais são reconhecidos como hospedeiros de manutenção, e podem facilmente se difundir mantendo a infecção no rebanho [4,19]. Ainda em relação ao sorovar Pomona, ele se destaca em bovinos por apresentar elevada patogenicidade, ocasionando icterícia e abortamento [28].…”

Section: Discussionunclassified

“…Esse achado é coerente com a análise univariada que identificou a variável assistência veterinária como um possível risco de infecção para leptospirose, apesar de não ter sido confirmada com o fator de risco. Esses dados também concordam com um estudo realizado em bovinos leiteiros no Maranhão, em que foi constatado que 98% dos proprietários não adotavam medidas sanitárias adequadas, o que pode ter contribuído para as elevadas prevalências obtidas [28].…”

Section: Discussionunclassified

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Serum Epidemiological Analysis and Risk Factors Associated with Leptospira spp. in Cattle in the State of Piauí

Ferreira

Sousa

Castro

et al. 2017

Acta Scientiae. Vet.

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Background: Leptospirosis is a cosmopolitan zoonosis caused by pathogenic spirochetes of the genus Leptospira spp. and it is considered one of the main causes of reproductive problems in cattle. Therefore, the aim of this study was to determine the occurrence of anti-Leptospira antibodies and identify the prevalent serovars and risk factors associated with infection in cattle herds, in the microregion of Floriano, Piaui State, Brazil. Materials, Methods & Results:A total of 414 bovine sera samples were collected (390 females aged over 24 months and 24 bulls) from 22 properties (farms) in the municipalities that compose the study area. The samples were analyzed using the Microscopic Agglutination Test (MAT) to detect anti-Leptospira antibodies from 23 pathogenic serovars. An epidemiological questionnaire was applied in each farm to evaluate the risk factors, using a univariate analysis of the variables of interest, by Pearson's Chi-square test (χ 2 ) or Fisher's exact test, when it was necessary. Then, each independent variable was crossed with the dependent variable and those that presented statistical significance <0.20 were selected for multivariate analysis, using logistic regression, adopting a significance level of 5%. This research identified 143 positive animals (MAT> 1: 100) in the 22 evaluated farms; all of them had at least one positive animal, resulting in a prevalence of 34.54%, with 32,8% females (136) and 1,7% males (07), and 8,93% (37) of co-agglutination. Nineteen of the 23 tested serovars were identified; among them, Icterohaemorrhagiae (42.48%), Hardjo (31.2%), Pomona (4.3%), and Castellonis (4.3%) stood out. Absence of quarantine (OR = 16.172, P = 0.024), vaccination (OR = 0.090, P = 0.037) and isolation of diseased animals (OR = 0.006, P = 0.030) were identified, by the multivariate logistic regression analysis, as risk factors for any serovar of Leptospira spp. Discussion:The results of the present study showed that leptospirosis is present in all studied municipalities, in which the prevalence may be related to the variety of factors that influence the occurrence of the disease, such as climatic and environmental conditions, transit of animal, practices of management adopted in the herd, and the lack of information about the disease. The occurrence of co-agglutination can be explained by the possibility of multiple and concomitant contaminations with several serovars. Icterohaemorrhagiae was the most prevalent serovar, which has significant importance to public health since it is considered the main serovar of leptospirosis in humans, associated with the presence of rodents. On the other hand, the serovar Hardjo is related to the chronic leptospirosis in cattle, demonstrated through reproductive problems. The serovars Castellonis and Pomona were also observed in bovine herds, suggesting a possible transmission of the microorganism between animal species, probably due to exposure to the same sources of infection. In fact, the large number of serovarieties of Leptospira spp. indicates the pres...

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Section: Discussionunclassified

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Serum Epidemiological Analysis and Risk Factors Associated with Leptospira spp. in Cattle in the State of Piauí

Ferreira

Sousa

Castro

et al. 2017

Acta Scientiae. Vet.

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“…in equids: abortion, weak neonates or premature fetuses, and recurrent uveitis, also known as periodic ophthalmia. This disease is considered an occupational threat to workers who are routinely exposed to open water sources or animals, including veterinarians, ranchers, slaughtermen, and meat inspectors (GREVEMEYER et al, 2017); contact with the pathogen occurs via placental remains, fetal tissues, urine, or water contaminated with these tissues or fluids (PAIXÃO et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Leptospirosis in donkeys (Equus asinus) destined for slaughter and export

Morais¹,

Júnior²,

Nunes³

et al. 2019

SCA

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Brazil is the eighth largest exporter of equidae meat in the world. Most donkey meat is obtained from discarded animals, raising concerns about their health status, particularly regarding zoonotic infections such as leptospirosis. Thus, this study aimed to determine the frequency of anti-Leptospira sp. antibodies in Northeastern donkeys at two properties specializing in producing donkeys for slaughter and export to the Chinese market, in the municipalities of Parnamirim (A) and Araripina (B), both located in the mesoregion of the Sertão of Pernambuco, Northeastern Brazil. The serum of 349 donkeys was collected, including 147 males and 202 females, aged 3 to 12 years. All animals were subjected to the Microscopic Agglutination Test (MAT) using a cut-off point of 1:50. A total of 19.8% seropositive animals were obtained. The Icterohaemorrhagiae serogroup was the most found in this study (40.6%), followed by Australis (27.5%), Autumnalis (8.7%), Sejroe (8.7%), Pomona (8.7%), Celledoni (2.9%), and Tarassovi (2.9%). A higher overall rate of seropositivity was found in donkeys from property B (2.2.4%) in the municipality of Araripina. In the association analysis, it was observed that animals less than 9 years of age were more likely to be seropositive, this may be due to the acquisition of resistance to Leptospira sp. as age advances. A significant number of donkeys seropositive for Leptospira sp. was found, thus, breeding these animals for slaughter and export requires implementing prophylactic measures.

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Aspectos epidemiológicos e reprodutivos de um surto de leptospirose em uma fazenda de bovinos de produção leiteira

Silva¹

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A Deus, em primeiro lugar, pois sem sua vontade nada disto seria possível. Aos meus pais, Ricardo José da Silva e Marta Regina Araújo Mundim Silva , pelo amor, apoio incondicional e dedicação. Aos familiares e amigos, que independente da distância, sempre estiveram ao meu lado, me fortalecendo nos momentos mais difíceis dessa jornada. À Profª. Drª. Anna Monteiro Correia Lima que me concedeu a oportunidade de ingressar no mestrado pelo Programa de Pós-graduação em Ciências Veterinárias da Faculdade de

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Leptospira spp. em bovinos leiteiros do estado do Maranhão, Brasil: frequência, fatores de risco e mapeamento de rebanhos reagentes

Abstract: PALAVRAS-CHAVE

Cited by 12 publications

References 15 publications

Serum Epidemiological Analysis and Risk Factors Associated with Leptospira spp. in Cattle in the State of Piauí

Serum Epidemiological Analysis and Risk Factors Associated with Leptospira spp. in Cattle in the State of Piauí

Leptospirosis in donkeys (Equus asinus) destined for slaughter and export

Aspectos epidemiológicos e reprodutivos de um surto de leptospirose em uma fazenda de bovinos de produção leiteira

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