Frequency of Leptospira spp. in sheep from Brazilian slaughterhouses and its association with epidemiological variables

Silva, Rodrigo da; Costa, Veruska Maia da; Shimabukuro, Fabio Hiroto; Richini-Pereira, Virgínia Bodelão; Menozzi, Benedito Donizete; Langoni, Hélio

doi:10.1590/s0100-736x2012000300002

Cited by 16 publications

(11 citation statements)

References 17 publications

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“…Dorjee et al (2008) reported that slaughterhouses pose a potential risk of transmission of leptospirosis because of the exposure of workers. Silva et al (2012) reported that sheep can be reservoirs of Leptospira spp. that can transmit the infection to humans and other domestic animals and thereby spread the disease to slaughterhouse workers who handle blood and viscera without personal protective equipment.…”

Section: Resultsmentioning

confidence: 99%

“…As animals are not immunized, they act as sources of infection for other animals and humans when they are exposed to infection by these serovars. The Ballum serovar has gained more prominence in the number of human cases of leptospirosis, as the second-most frequent serovar in New Zealand (THORNLEY et al, 2002). This serovar was recently reported to be the leading cause of severe leptospirosis in humans in Cuba .…”

Section: Resultsmentioning

confidence: 99%

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Influence of storage on the chemical composition of Stylosanthes hays for equine feeding

et al. 2016

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The aim of this survey was to determine the frequency of anti-Leptospira spp. antibodies in goats and sheep slaughtered in different slaughterhouses in the State of Paraiba, in the semi-arid region of Northeastern Brazil. Blood samples were collected from 500 goats and 500 sheep randomly selected. To verify the presence of anti-Leptospira spp. antibodies the microscopic agglutination test (MAT), using 24 serovars as antigens, was used. From the 1,000 animals analyzed, 82 (8.2%; 95% CI = 7.0%-10.5%) were sero-reactive being 26/500 (5.2%; 95% CI = 3.5%-7.5%) in goats and 56/500 (11.2%; 95% CI = 8.7%-14.2%) in sheep. The most frequent serovars were Hardjobovis (14.6%) and Autumnalis (13.4%). In goats, the most frequent serovar was the Hardjobovis, and in sheep the Ballum, with frequencies of 19.2% and 17.9%, respectively. There was a significant difference in the frequency of positive animals among slaughterhouses, both for goats (p = 0.035) and for sheep (p = 0.004), with the county of Alhandra presenting the highest frequency of seropositive animals for both species. It is concluded that sheep and goats from the semiarid region of the Northeastern Brazil may have become adapted to the serovars Hardjobovis e Autumnalis, as well as wild rodents may be involved in the transmission of the disease. It is possible that the climatic conditions influenced in the transmissibility of the leptospirosis, especially in the Mata Paraibana mesoregion, however it was not considered as being sufficient to justify the low frequency of seropositive animals. In this way, it is possible to suggest the hypothesis that the rusticity of the small ruminants in the studied region contributed to the low sero-reactivity verified. Key words: Adaptability. Goats. Leptospirosis. Sheep. Rusticity. ResumoO objetivo deste estudo foi determinar a frequência de anticorpos anti-Leptospira spp. em caprinos e ovinos abatidos em diferentes matadouros no Estado da Paraíba, região semiárida do Nordeste brasileiro. Foi coletado sangue de 500 caprinos e 500 ovinos aleatoriamente selecionados. Para verificar a presença de anticorpos anti-Leptospira spp. empregou-se o teste soroaglutinação microscópica (SAM), utilizando-se 24 sorovares como antígenos. Dos 1.000 animais analisados 82 (8,2%; IC 95%= 7,0%-10,5%) foram sororreagentes, sendo 26/500 (5,2%; IC 95% =3,5%-7,5%) em caprinos e 56/500 (11,2%; IC 95% 8,7%-14,2%) em ovinos. Os sorovares mais frequentes foram Hardjobovis (14,6%) e Autumnalis (13,4%). Na espécie caprina, o sorovar mais frequente foi o Hardjobovis, e na espécie ovina o Ballum, com frequências de 19,2% e 17,9%, respectivamente. Houve diferença significativa na frequência de positivos entre os matadouros, tanto para caprinos (p = 0,035) quanto para ovinos (p = 0,004), com o município de Alhandra apresentando a maior frequência de soropositivos para ambas as espécies. Concluiu-se que ovinos e caprinos da região semiárida do Nordeste podem estar adaptados aos sorovares Hardjobovis e Autumnalis, bem como roedores silvestres estarem envolv...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Influence of storage on the chemical composition of Stylosanthes hays for equine feeding

et al. 2016

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“…SILVA et al (2012) reported that purebred sheep presented high seropositivity when compared to mixed-breed sheep, and SANTOS et al (2012) also stated that purebred sheep were more susceptible to Leptospira spp. infection.…”

Section: Discussionmentioning

confidence: 99%

“…In small ruminants, breed has also been found to be a risk factor associated with leptospirosis (SALABERRY et al, 2011;SANTOS et al, 2012;SILVA et al, 2012). Therefore, the purpose of this study was to detect Leptospira spp.…”

Section: Microbiologymentioning

confidence: 99%

Leptospirosis in native mixed-breed sheep slaughtered in a semiarid region of Brazil

et al. 2017

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“…In sheep, the rate varies from 0.7% in São Paulo State (FÁVERO et al, 2002) to 47.4% in Rio de Janeiro State (MARTINS et al, 2012). Infection by B. ovis has also been diagnosed in several Brazilian states with variations between 0.72% in Bahia State (SOUZA et al, 2012) and 34% in Rio Grande do Norte State (SILVA et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Epidemiological characterization and risk factors associated with leptospirosis and brucellosis in small ruminants sold at animal fair in the Sertão Region of Pernambuco State, a semiarid Region of Northeastern Brazil

Alves

Lima

Silva

et al. 2017

SCA

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The transit of infected animals may be a route for the introduction and dispersal of diseases, which necessitates protocols for the controlled entry of infected animals into herds. The objective of this study was to determine the prevalence of anti-Leptospira and anti-Brucella ovis antibodies in small ruminants sold at an animal fair in the Sertão region of the Pernambuco State, Northeastern Brazil, and to identify the possible risk factors associated with seropositivity. Serum samples were collected from 233 goats and 119 sheep, belonging to twelve different owners from November 2014 to June 2015. Diagnosis of Leptospira spp. infection was established using the microscopic agglutination test (MAT); for B. ovis infection, the agar gel immuno-diffusion (AGID) test was conducted. A total of 16/233 (6.87%; 95% CI = 4.27% -10.83%) goats and 16/119 (13.45%; 95% CI = 8.67% -21.24%) sheep were identified as seropositive for Leptospira spp. The most frequent serotype was Icterohaemorrhagiae. In goats, intensive management system (odds ratio = 15.8; p < 0.001) and consorted rearing of equines and goats (odds ratio = 7.3; p = 0.005) were identified as risk factors. There were no risk factors identified for sheep. Seven (5.88%; 95% CI = 2.88% -11.65%) sheep were seropositive for B. ovis, and the intensive management system was identified as the risk factor (odds ratio = 11.5; p = 0.005). This suggests that Leptospira spp. and B. ovis infections occur in small ruminants commercialized in the Sertão region of the Pernambuco State. Thus, improvements to the sanitary conditions of the facilities and the control of synanthropic rodents are recommended. ResumoO trânsito de animais infectados pode ser uma forma de introdução e dispersão de enfermidades, de maneira que o bloqueio da entrada de animais infectados nos rebanhos é uma importante ferramenta de controle. O objetivo desse estudo foi determinar a frequência de anticorpos anti-Leptospira spp. e antiBrucella ovis em pequenos ruminantes comercializados em feira de animais no Sertão de Pernambuco, Nordeste do Brasil, e identificar os possíveis fatores de risco associados às soropositividades. Foram coletadas amostras de soro de 233 caprinos e 119 ovinos, pertencentes a doze proprietários diferentes, no período de novembro de 2014 a junho de 2015. O diagnóstico da infecção por Leptospira spp. foi realizado pela técnica de soroaglutinação microscópica (SAM), e para B. ovis o teste de imunodifusão em gel de ágar (IDGA) foi aplicado. Foram identificados 16 (6,87%; IC 95% = 4,27% -10,83%) caprinos e 16 (13,45%; IC 95% = 8,67% -21,24%) ovinos soropositivos para Leptospira spp. O sorotipo mais frequente foi o Icterohaemorrhagiae. Em caprinos, a criação de forma intensiva (odds ratio = 15,8; p < 0,001) e criar equinos consorciados com caprinos (odds ratio = 7,3; p = 0,005) foram identificados como fatores de risco. Não foi identificado fator de risco associado à infecção em ovinos. Sete (5,88%; IC 95% = 2,88% -11,65%) ovinos foram soropositivos para B. ovis, e a criação inte...

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Frequency of Leptospira spp. in sheep from Brazilian slaughterhouses and its association with epidemiological variables

Cited by 16 publications

References 17 publications

Influence of storage on the chemical composition of Stylosanthes hays for equine feeding

Influence of storage on the chemical composition of Stylosanthes hays for equine feeding

Leptospirosis in native mixed-breed sheep slaughtered in a semiarid region of Brazil

Epidemiological characterization and risk factors associated with leptospirosis and brucellosis in small ruminants sold at animal fair in the Sertão Region of Pernambuco State, a semiarid Region of Northeastern Brazil

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