Fatores de risco para a leptospirose em fêmeas bovinas em idade reprodutiva no Estado de São Paulo

Castro, Vanessa; Azevêdo, Sérgio Santos de; Gotti, T.B.; Batista, C.S.A.; Gentili, J.; Morais, Zenáide Maria de; Vasconcellos, Sílvio Arruda; Genovez, Margareth Élide

doi:10.1590/s0102-09352009000600026

Cited by 6 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Furthermore, the immunity boost provided by the vaccine to younger animals is an extremely important effect, as these animals have just entered reproductive life and undergo several challenges within the physiological and structural development process. In addition, they are exposed to stressful factors due to the first contact with the FTAI management to which they are subjected (CASTRO et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

Analysis of the efficiency of active immunization against IBR, BVD and leptospirosis in increasing pregnancy rate in FTAI protocols

Sartori

Perucchi

Pereira

et al. 2020

AVB

View full text Add to dashboard Cite

Article history Beef cattle farming is a highly representative activity for the GDP of Brazil, rendering the country an important producer of beef. For Brazil to maintain this prominent position, sanitary management actions must be carried out, such as the control of reproductive diseases. This study examines the effectiveness of vaccination against reproductive diseases in bovine females. Data from 8752 Zebu cows on the status of vaccination against reproductive diseases, body condition score (BCS) and the subsequent result of pregnancy diagnosis were evaluated. With regard to BCS, primiparous was the category that most demonstrated the effect of body condition on pregnancy rate, with BCS 3.5 cows having a 30% higher rate than the animals with BCS 2. In the group of nulliparous cows, those with BCS 3.5 had a pregnancy rate of 58% vs. 46% in BCS 3 cows. The induced nulliparae with BCS 3.5 had a 9% higher pregnancy rate than those with BCS 3. Multiparous cows also had a 9% higher rate when their BCS was 3.5 as compared with BCS 2. Among the evaluated dams, 46.5% were vaccinated against IBR, BVD and leptospirosis. Of these, the primiparae showed a 21% increase in conception as compared with the non-vaccinated group; multiparae, 10%; nulliparae, 5.9%; and induced nulliparae, 7.8%. In conclusion, BCS directly influences the reproductive efficiency of bovine females, and the use of vaccination against reproductive diseases can be recommended. However, this indication must be based on epidemiological and animal-performance data of each farm.

show abstract

Section: Resultsmentioning

confidence: 99%

Analysis of the efficiency of active immunization against IBR, BVD and leptospirosis in increasing pregnancy rate in FTAI protocols

Sartori

Perucchi

Pereira

et al. 2020

AVB

View full text Add to dashboard Cite

show abstract

“…The commercial vaccines for cattle available on the market have in their composition the antigens: Pomona, Wolffi, Hardjo, Icterohaemorrhagiae, Canicola, and Grippotyphosa, which do not protect against the serovars Shermani and Hebdomadis that were highly prevalent in this and other studies on bovine leptospirosis. In addition to vaccination, Castro et al (2008) also pointed out that the serovars Shermani, Hebdomadis, and Autumnalis are often not present in routine tests and, although they may be infecting herds, they are not being detected.…”

Section: Discussionmentioning

confidence: 99%

“…Besides confirming the infection diagnosis, isolating Leptospira spp. in a herd with infected cattle is certainly an important step for implementing disease control programs, since it allows including native serovars in vaccines and the diagnostic microscopic agglutination test, MAT (Castro et al, 2008;Sarmento et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Epidemiological characteristics of Leptospira spp. infection in bovine herds in Mato Grosso do Sul, Brazil

Santos

Frias

Silva

et al. 2021

Braz. J. Vet. Res. Anim. Sci.

View full text Add to dashboard Cite

The epidemiological characteristics of bovine leptospirosis in animals and herds in Mato Grosso do Sul were investigated to determine parameters such as disease frequency and the serovars reactant in beef cattle herds. A total of 4,629 beef cattle herds were examined against 33 Leptospira spp. serovars. The serum samples were submitted to the microscopic agglutination test (MAT) for the serological diagnosis of leptospirosis. The MAT results showed that 3,814 (82.39%) of the 4,629 animals evaluated were seropositive for the bacterium, with serological reactions mainly to serogroup Sejroe, serovar Wolffi (36.49%). The observed high frequency of reactive animals demonstrates the relevance of the infection. Therefore, general and specific measures should be implemented to contain and/or prevent infection of the animals in the studied region.

show abstract

“…Deste modo, se os animais estiverem no período de incubação de alguma doença, serão identificados quando manifestarem os sinais clínicos. Esses resultados estão de acordo com um estudo realizado no estado de São Paulo com fêmeas bovinas [7], que destacou como importante fator de risco para leptospirose em bovinos a compra de reprodutores, quando a mesma é realizada desrespeitando as práticas sanitárias preventivas, contribuindo para a introdução, manutenção e disseminação de doenças, como a leptospirose.…”

Section: Discussionunclassified

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.

View full text Add to dashboard Cite

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...

show abstract

Fatores de risco para a leptospirose em fêmeas bovinas em idade reprodutiva no Estado de São Paulo

Cited by 6 publications

References 6 publications

Analysis of the efficiency of active immunization against IBR, BVD and leptospirosis in increasing pregnancy rate in FTAI protocols

Analysis of the efficiency of active immunization against IBR, BVD and leptospirosis in increasing pregnancy rate in FTAI protocols

Epidemiological characteristics of Leptospira spp. infection in bovine herds in Mato Grosso do Sul, Brazil

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

Contact Info

Product

Resources

About