Prevalence and incidence of subclinical mastitis in goats and dairy ewes in Vermont, USA

McDougall, S; Pankey, Woody; Delaney, Carol; Barlow, John W.; Murdough, P.A.; Scruton, Dan

doi:10.1016/s0921-4488(02)00191-8

Cited by 66 publications

(65 citation statements)

References 24 publications

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“…Ten microliters of sample was spread on MacConkey and blood agar (without esculin) containing 5% defibrinated sheep blood. The plates were incubated at 378C for 24 and 48 h. Colonies were classified according to Gram staining, morphology and hemolysis properties in order to determine intramammary infection (IMI), contamination and mixed infections (Harmon et al, 1990;Blowey and Edmondson 1995;Wilson et al, 1997;Quinn et al, 1999;McDougall et al 2002). If three or more of the same colonies were obtained on a plate, this was considered as an IMI.…”

Section: Methodsmentioning

confidence: 99%

Nitric oxide concentrations in mammary quarters during heifer mastitis

Baştan

Cengiz

et al. 2013

Animal

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The aim of this study was to evaluate nitric oxide (NOx) concentration in infected and non-infected mammary quarters of dairy heifers before and after calving. The relationship between bacterial species and NOx concentrations, as well as correlation between NOx concentrations and postpartum somatic cell count (SCC), was assessed. Coagulase-negative staphylococci, Staphylococcus aureus and Escherichia coli were the bacteria commonly isolated during the pre-and postpartum period. Infected quarters had greater NOx concentrations than non-infected quarters before (30.81 v. 22.83 mM/ml, P , 0.05) and after (9.56 v. 5.77 mM/ml, P , 0.0001) calving. It was determined that the interaction between sampling period and infectious status had no effect on NOx concentration (P , 0.16). Infected quarters had greater SCC (log 10 ) than healthy quarters (4.95 v. 4.39; P , 0.0001). NOx concentrations, however, did not correlate with SCC (r 5 0.02). In summary, changes in NOx concentration were mainly dependent on the infectious status of the quarters with variations among the bacterial species (P , 0.05).Keywords: heifer, mastitis, nitric oxide, somatic cell count Implication Mastitis in first-calf heifers affects the profitability of dairying. Despite bacteriology being the only fully reliable way to detect mastitis, many other markers have been proposed. Owing to the relationship between the degree of infection and released nitric oxide (NOx), this study tested milk and lacteal NOx level. Infected quarters had greater NOx concentrations than non-infected quarters before (30.81 v. 22.83 mM/ml) and after (9.56 v. 5.77 mM/ml) calving. Lacteal NOx level greater than 24 mM/ml and milk NOx level greater than 6.5 mM/ml indicate pre-and postpartal mastitis status.

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Section: Methodsmentioning

confidence: 99%

Nitric oxide concentrations in mammary quarters during heifer mastitis

Baştan

Cengiz

et al. 2013

Animal

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“…Koyunlarda subklinik mastitisin etiyolojisinde ilk sırayı özellikle koagulaz negatif stafilokoklar olmak üzere stafilokoklar alırken, streptokoklar, mikrokoklar ve diğer etkenler daha sınırlı bir role sahiptirler (14,26). Özellikle koagulaz negatif stafilokoklar %30-95 oranıyla subklinik mastitis oluşturan etkenler arasında birinci sırayı almaktadır (7).…”

Section: Tartışma Ve Sonuçunclassified

Koyunlarda klinik, mikrobiyolojik ve biyokimyasal metotlar ile subklinik mastitislerin saptanması

KAYMAZ¹

2006

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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“…Mastitis is defined as an inflammation of the mammary gland, affects lactating animals including cattle, goats, sheep, buffaloes and camels and is almost always associated with bacterial infection. Mastitis in the goat is mainly subclinical (Contreras et al 1995 andMcDougall et al 2002). It is one of the major problems of the dairy industry worldwide including Bangladesh.…”

Section: Introductionmentioning

confidence: 99%

Epidemiological studies on subclinical mastitis in dairy goats in northern regions of Bangladesh

Begum

Hossain

Ershaduzzaman

et al. 2016

Bangladesh J. of Livestock Res.

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A cross sectional study was carried out from June, 2008 to December, 2010 to estimate the prevalence of subclinical mastitis and to determine the responsible bacterial pathogens in lactating dairy goats in northern districts of Bangladesh. A total of 292 goats and 584 udder halves milk samples were screened using California Mastitis Test (CMT). Prevalence of subclinical mastitis at goat level was 56.2% (164/292), and in udder half level it was 33.9% (198/584). The subclinical mastitis prevalence at goat level was high (71.6%) in Jamnapari goats as compared to Black Bengal goats (50.2%), whereas at the udder half level, subclinical mastitis prevalence was 45.1% and 29.6% in Jamnapari and Black Bengal goats, respectively. The pathogens isolated from subclinical mastitic milk samples were coagulase negative Staphylococci, Coliforms, Streptococcus spp., Staphylococcus aureus, Micrococcus spp., Pseudomonas aeruginosa and Bacillus cereus. Among these, the most frequent isolates were coagulase negative Staphylococci (28.8%), Coliforms (22.7%) and Streptococcus spp (15.2%). Out of four potential host related risk factors considered, litter size and body condition of goats were found to influence the prevalence rate of subclinical mastitis in goat significantly (p< 0.05). On the other hand, the subclinical mastitis was very significantly (p=0.0001) associated with the housing system of goats, i.e., goats reared in raised floor had a low subclinical mastitis infection rate (35.8%) as compared to reared in earth floor (62.2%). Antibiogram studies were also performed for the bacterial isolates and Gentamicin was found to be the most effective drug.

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Prevalence and incidence of subclinical mastitis in goats and dairy ewes in Vermont, USA

Cited by 66 publications

References 24 publications

Nitric oxide concentrations in mammary quarters during heifer mastitis

Nitric oxide concentrations in mammary quarters during heifer mastitis

Koyunlarda klinik, mikrobiyolojik ve biyokimyasal metotlar ile subklinik mastitislerin saptanması

Epidemiological studies on subclinical mastitis in dairy goats in northern regions of Bangladesh

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