Etiological agents of bovine mastitis

Watts, Jeffrey L.

doi:10.1016/0378-1135(88)90126-5

Cited by 306 publications

(225 citation statements)

References 69 publications

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“…This is in contrast to three previous reports of mastitis associated with C. burnetii infection that did not appear to investigate the possibility of mastitis caused by common aerobic mammary pathogens [4,13,24]. Although we were able to account for the potential effect of bacterial mastitis pathogens identified by routine aerobic culture, we could not eliminate the possible role of other less common bacterial or viral pathogens that might be associated with subclinical mastitis [21,25,26]. Despite this limitation, our finding that A-IMI negative CbPCR positive cows had a median SCC of > 200 000 cells/mL compared to < 100 000 cells/mL for A-IMI negative CbPCR negative cows is of particular interest from the perspective of mastitis control, as SCC is used as a diagnostic screening test in mastitis control programs [23].…”

Section: Discussioncontrasting

confidence: 58%

“…In reviews of mastitis etiologies, most authors recognize the potential public health significance of C. burnetii excretion in milk without describing the organism as a cause of mastitis [10,22]. Some reviews have included C. burnetii among "the lesser known organisms that may cause mastitis" [21], while others did not include the organism among a broad review of bacterial etiologic agents of mastitis [25]. In 1948 and 1949 respectively, a case of chronic focal mastitis in a cow naturally infected with C. burnetii [13], and severe acute mastitis following experimental intramammary inoculation of dairy cattle [4] were described.…”

Section: Introductionmentioning

confidence: 99%

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Association betweenCoxiella burnetii shedding in milkand subclinical mastitis in dairy cattle

et al. 2008

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-The objective of this research was to explore the potential association between Coxiella burnetii shedding in milk and chronic subclinical mastitis in dairy cattle. In two separate studies, we identified an association between PCR-based detection of C. burnetii in milk and chronic subclinical mastitis in lactating dairy cows. These studies were conducted in a commercial dairy herd where there was ongoing intensive monitoring of subclinical mastitis by aerobic bacteriology, but no prior knowledge or management of C. burnetii infections. In a case-control study, quarter level C. burnetii status determined by real-time quantitative PCR (RT-qPCR) was strongly associated with chronic subclinical mastitis as measured by milk somatic cell counts. In a subsequent cross sectional study, 147 (45%) of 325 lactating cows were positive for C. burnetii by RT-qPCR of composite milk samples. In a generalized linear model, accounting for the effect of covariates including aerobic intramammary infection status, C. burnetii PCR status was a significant predictor of linear somatic cell count score. In agreement with a small number of previous reports, this research provides evidence that there may be mammary gland specific manifestations of C. burnetii infections in dairy cattle. Coxiella burnetii / dairy cattle / mastitis

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Section: Discussioncontrasting

confidence: 58%

Section: Introductionmentioning

confidence: 99%

Association betweenCoxiella burnetii shedding in milkand subclinical mastitis in dairy cattle

et al. 2008

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“…De acordo com Brandão et al (2008), a presença do bezerro contribui para uma menor incidência da mastite subclínica, pois há maior eficiência na ejeção do leite em decorrência da maior liberação de oxitocina. Para Das et al (1999) e Combellas et al (2003), a redução da mastite Watts (1988), Booth (1995), Bramley et al (1996) e Brito et al (1999Brito et al ( , 2001) que encontraram S. aureus com maior prevalência nas infecções da glândula mamária, sendo no presente estudo o segundo patógeno mais isolado, tanto na mastite clínica quanto na subclínica. A maior prevalência de Staphylococcus spp.…”

Section: Resultsunclassified

Prevalência e etiologia da mastite bovina na bacia leiteira de Rondon do Pará, estado do Pará

et al. 2011

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RESUMO.-O objetivo do presente trabalho foi pesquisar a prevalência e a etiologia da mastite bovina na bacia leiteira do município de Rondon do Pará, bem como avaliar o perfil de sensibilidade e resistência dos agentes isolados frente aos antimicrobianos. The prevalence and the etiology of bovine mastitis in the dairy region of the county of Rondon of Pará were investigated. The sensibility and the resistance of the isolated agents to the antimicrobiotics was evaluetad; 237 mixed-bred milk cows were used on nine properties, which were hand milked once a day and kept on Brachiaria brizantha pasture, with supply of mineral salt and water ad libitum. Clinical examination of the mammary gland, the test of the sieve and California Mastitis Test were performed. Of the 935 examined mammary quarters, 6.6% had subclínical mastitis, 1.3% clinical mastitis, and 92.1% were negative. The isolated bacteria in the clinical mastitis were coagulase negative Staphylococcus spp. (25%), Staphylococcus aureus (16.7%), Streptococcus spp. (8,3%), and Corynebacterium spp. (8.3%). In the subclínical mastitis coagulase negative Staphylococcus spp. (32.3%), Staphylococcus aureus (17.7%), Staphylococcus intermedius (1.6%), Streptococcus spp. (4.8%), Corynebacterium spp. (4.8%), and coagulase negative Staphylococcus spp./S.aureus (1.6%) were isolated. There was no microbial growth in 41.7% of the samples with clinical mastitis and in 37.1% with subclínical mastitis. In the antibiogram, 100% of the isolated negative coagulase Staphylococcus spp., S. aureus, S. intermedius, and Streptococcus spp. were sensitive to sulfazotrim. On the other hand, Corynebacterium spp. were 100% resistant to this same antimicrobiotic. Cefalotina, cefoxitina and gentamicina were efficient against the isolated Staphylococcus spp. which represent the greater part of the mastitis agents in this study. Mastitis was diagnosed in all flocks studied, however the number of affected animals was considered low; this probably is due to low milk production of the cows and to permanence of the calf with the mother after milking, what favors emptying the mammary gland. But hygienic sanitary measures and management practices have to be improved.

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“…Mastitis is a general term which refers to inflammation of mammary tissues without concerning the cause and is abundantly present in high producing buffalo, cattle, sheep and goat in all over the world (3). It is characterized by physical, chemical, pathological and bacteriological alteration in milk and mammary tissue (4).…”

Section: Introductionmentioning

confidence: 99%

Effect of Season on Occurrence of Caprine Mastitis in Beetal in Faisalabad Premises

Rashid¹,

Saleem²,

Deeba³

et al. 2017

Matrix sci. medica

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Mastitis in goats, analogous to dairy cattle, is one of the most significant diseases of economic importance, worldwide. For the proposed study 25 Beetal Faisalabadi goat farms comprising 10-20 goats in radius of 25 km was included. Sampling was done during two kidding season first in September-October and second in FebruaryMarch. The epidemiological data, including goat breed, age, parity, stage of lactation, amount of milk, length of lactation period, and farming system were recorded. These selected herds were screened out by SFMT and positive milk samples were aseptically collected. Samples from infected goats were subjected to microbiological assays. On the basis of results of sampling, screening and microbiological analysis of milk samples it was revealed that mastitis is more in summer season as compared to winter season. In winter the occurrence of mastitis in beetal Faisalabadi was 21.68% and in summer it was 25.70%. Bacteriological examination of mastitic milk samples revealed that Staphylococcus species was the major etiological agent of caprine mastitis in Beetal Faisalabadi goats during both season. Statistical results of the study has showed that age, teat length, teat end, teat symmetry, distance between teat length and floor, stage of lactation and udder shape has significant effect on caprine mastitis (p<0.05). Parameters like season, udder washing, condition of floor, farm hygiene, milk practices and housing has no significant effect on mastitis (p>0.05).

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Etiological agents of bovine mastitis

Cited by 306 publications

References 69 publications

Association betweenCoxiella burnetii shedding in milkand subclinical mastitis in dairy cattle

Association betweenCoxiella burnetii shedding in milkand subclinical mastitis in dairy cattle

Prevalência e etiologia da mastite bovina na bacia leiteira de Rondon do Pará, estado do Pará

Effect of Season on Occurrence of Caprine Mastitis in Beetal in Faisalabad Premises

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