Falhas da reprodução na pecuária bovina de corte com ênfase para causas infecciosas

Junqueira, José Ricardo Cecilio; Alfieri, A.A.

doi:10.5433/1679-0359.2006v27n2p289

Cited by 23 publications

(29 citation statements)

References 8 publications

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“…There are different causes for these reproductive problems and leading serious economic losses for the production chain (Junqueira and Alfieri 2006). Infectious diseases such as bovine genital campylobacteriosis (BGC) and bovine trichomonosis (BT) constitute two of the main causes of reproductive disorders in dairy herds (Alves et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Prevalence and risk factors associated with bovine genital campylobacteriosis and bovine trichomonosis in the state of Pernambuco, Brazil

Oliveira

Silva

Filho

et al. 2015

Trop Anim Health Prod

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The aim of the present study was to determine the prevalence and risk factors associated with Campylobacter fetus subsp. venerealis and Tritrichomonas foetus infection in cows from dairy herds in the state of Pernambuco, Brazil. In total, 383 samples of cervico-vaginal mucus were collected from cows on 21 herds in 19 districts. Genomic DNA was extracted from the samples and submitted for polymerase chain reaction analysis. An investigative questionnaire was used to analyze the risk factors, using questions related to reproductive and hygiene/sanitation management. A prevalence of 1.8% (0.8-3.9%; confidence interval (CI) 95%) and 33.4% (28.7-38.4%; CI 95%) was found for C. fetus subsp. venerealis and T. foetus, respectively. In terms of the number of foci, 28.6% of the herds contained at least one animal that was positive for C. fetus subsp. venerealis and 90.5% for T. foetus. The present study identified herds larger than 100 animals as a risk factor for bovine genital campylobacteriosis (OR = 7.2; CI 1.3-38.4%; p = 0.020) and the use of natural breeding as a risk factor for bovine trichomonosis (OR = 2.4; CI 1.1-5.9%; p = 0.041). In conclusion, C. fetus subsp. venerealis and T. foetus infections occurred in the region studied and high numbers of foci were found. Thus, prophylaxis and control measures, such as diagnosis, separation, and sexual rest for infected females, are suggested. An artificial insemination program with early rigorous sanitary care should be implemented on the properties in order to avoid the spread of agents in the herds.

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Section: Introductionmentioning

confidence: 99%

Prevalence and risk factors associated with bovine genital campylobacteriosis and bovine trichomonosis in the state of Pernambuco, Brazil

Oliveira

Silva

Filho

et al. 2015

Trop Anim Health Prod

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“…Reproductive disorders of infectious origin in cattle are considered to be multietiological because different microorganisms such as bacteria, viruses, fungi and protozoa may be responsible for the impaired reproductive performance of affected herds. Serological techniques have provided a substantial of information regarding the epidemiological profiles of cattle herds relative to certain etiologies (JUNQUEIRA; ALFIERI, 2006). In this study, the animals were found to be negative for brucellosis, IBR and BVD indicating no circulation of these pathogens in the herd.…”

Section: Resultsmentioning

confidence: 58%

Serological and molecular findings in diagnosis of leptospirosis serovar hardjo in a dairy bovine herd

Hashimoto¹,

Chideroli

Ribeiro

et al. 2017

SCA

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The cattle are considered hosts of the Hardjo serovar, causing economic damages due to the reproductive failures like abortions and infertility. The serovar Hardjo usually remains in the reproductive tract and also in the renal tubules where it is eliminated intermittently in the urine for months. Placental remnants, the aborted fetus and contaminated urine promote the permanence of this bacterium within the herd for years. Thus, the objective of this study was to monitor for prolonged period, cows naturally infected with Leptospira ssp. through microbiological culture, serological examination and DNA detection of the pathogen in the urine. The dairy herd was composed of 50 breeding cows with a history of abortion and infertility, without leptospirosis vaccine and located in the northern region of Paraná. Blood and urine samples were collected and laboratorial diagnosis were performed five times at intervals of four months. Blood samples were collected from the all 50 animals and the serum was submitted to the microscopic agglutination test (MAT) for the detection of anti-leptospira antibodies. Of the total cows, 20 showed antibody titres ≥ 1: 100 in MAT and urine samples were collected from only those animals with higher titers to perform nested-PCR (n-PCR) and bacterial isolation per culture. In addition, two urine samples from five animals with antibody titers < 1: 100 were collected in MAT for n-PCR. Serovar Hardjo was considered the most frequent during the serological monitoring of the animals evaluated. The n-PCR technique was able to detect leptospiral DNA in the urine of animals with MAT ≥ 1: 100 antibody titers and urine from animals whose titers were < 1: 100. Sequencing of the leptospiral amplicons shared 100% nucleotide sequence identity with the Leptospira interrogans species. Positive n-PCR results from animals with titers of < 1: 100 suggest that the cut-off of MAT is could be not sufficient to detect renal carriers, so it is also important to use n-PCR as an additional diagnostic tool for identify infected animals with Hardjo serovar and whose serology was negative. reprodutivo e também nos túbulos renais onde é eliminado de forma intermitente na urina por meses. Restos placentários, o feto abortado e a urina contaminada favorecem a permanência dessa bactéria dentro do rebanho por anos. Assim, o objetivo deste estudo foi monitorar por período prolongado, vacas naturalmente infectadas por Leptospira ssp. através de cultura microbiológica, exame sorológico e detecção de DNA do patógeno na urina. O rebanho leiteiro estudado era constituído por 50 vacas reprodutoras com histórico de abortos e infertilidade, sem uso de vacina contra a leptospirose e localizada na região Norte do Paraná. As amostras de sangue e urina foram coletadas e submetidas a análises laboratoriais em cinco vezes em intervalos espaçados de quatro meses. As amostras de sangue foram coletadas dos 50 animais e o soro foi submetido ao teste de soroaglutinação microscópica (SAM) para detecção de anticorpos anti-leptospira. Do ...

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“…As with abortion, repeated breeding also has other infectious causes such as campylobacteriosis, trichomoniasis, and genital mycoplasmosis, as well as non-infectious causes such as trauma, genetic and hormonal disorders, and ovarian cysts (JUNQUEIRA; ALFIERI, 2006).…”

Section: Discussionmentioning

confidence: 99%

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

Nasciutti

Oliveira

Barbosa

et al. 2018

SCA

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Neospora caninum causes reproductive disorders in dairy cattle such as repeat breeding, abortion, and anestrus, which are risk factors associated with the seroprevalence of N. caninum in Brazil and worldwide. This study aimed to verify the risk factors related to the seroprevalence of Neospora caninum in crossbred dairy cows in the city of Uberlândia, Minas Gerais. During, January to July 2013, 740 blood samples were collected from 57 herds with a history of reproductive disorders and determinations of antibody titers against N. caninum were obtained by ELISA assay. The seroprevalence of N. caninum was 18.4% (136/740). Risk factors for N. caninum were cows greater than 2 years of age (P = 0.034), mechanical milking (P = 0.012), and frequent purchase of animals (P = 0.004), in addition to individual history of abortion (P = 0.007) and repeat breeding (P = 0.030). The highest probability of occurrence of associated risk factors was associated with individual history of abortion and repeated breeding and the frequent purchase of animals, with odds of 12.8, 5.9, and 3.8 times, respectively. In conclusion, the risk factors associated with N. caninum: members of the female sex and cows with more than 2 yearsof-age, mechanical milking, and the frequent purchase of animals, in addition to individual history of abortion and repeated breeding.

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Falhas da reprodução na pecuária bovina de corte com ênfase para causas infecciosas

Cited by 23 publications

References 8 publications

Prevalence and risk factors associated with bovine genital campylobacteriosis and bovine trichomonosis in the state of Pernambuco, Brazil

Prevalence and risk factors associated with bovine genital campylobacteriosis and bovine trichomonosis in the state of Pernambuco, Brazil

Serological and molecular findings in diagnosis of leptospirosis serovar hardjo in a dairy bovine herd

Seroprevalence and risk factors associated with Neospora caninum in crossbred dairy cows in Uberlândia

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