Management factors associated with the incidence of clinical mastitis over the non-lactation period and bulk tank somatic cell count during the subsequent lactation

McDougall, S

doi:10.1080/00480169.2003.36342

Cited by 22 publications

(16 citation statements)

References 27 publications

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“…Attention was also focused on the correlation between the incidence of subclinical or clinical mastitis and BTMSCC (Barkema et al, 1998b;McDougall, 2003;Lukas et al, 2005). Few authors concentrated on the culture findings of pathogens of the bovine mammary gland in BTMS and BTMSCC simultaneously (Fenlon et al, 1995;Jayarao et al, 2004;Olde Riekerink et al, 2006) as we did in the present study.…”

Section: Discussionmentioning

confidence: 81%

“…Various studies investigated risk factors in herds and their associations with BTMSCC (Erskine et al, 1987;Schukken et al, 1991;Wilson et al, 1995Wilson et al, , 1997Barkema et al, 1998a;Barkema et al, 1999;Khaitsa et al, 2000;Peeler et al, 2000;McDougall, 2003;Barnouin et al, 2004;Rodrigues et al, 2005;van Schaik et al, 2005;O'Reilly et al, 2006). Attention was also focused on the correlation between the incidence of subclinical or clinical mastitis and BTMSCC (Barkema et al, 1998b;McDougall, 2003;Lukas et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

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Bulk tank milk somatic cell count and sources of raw milk contamination with mastitis pathogens

Rysanek¹,

Babák²,

Zouharová³

2007

Vet. Med. - Czech

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The objective of this study was to probe the relationship between prevalence of selected principal mastitis pathogens and somatic cell counts in bulk tank milk samples. The sources of milk contamination were evaluated. The samples were collected from 298 dairy herds (with approximately 32 000 dairy cows). Only 48.3% of the bulk tank milk samples were free of contamination of pathogens of interest. Approximately 38.9% of the milk samples were contaminated with only one, 12.4% with two and 0.3% with three pathogens. The arithmetic mean of logarithmically transformed data of bulk tank milk somatic cell count rise in order: pathogen free, Pseudomonas aeruginosa, Streptococcus uberis, Escherichia coli and Staphylococcus aureus (5.381; 5.413; 5.495; 5.518; 5.563, respectively). The arithmetic mean differences between bulk tank milk somatic cell counts in pathogen-free and single-pathogen contaminated samples have revealed a significance for the Escherichia coli and Staphylococcus aureus groups (P < 0.01). Using binary logistic regression, a statistically highly significant relationship (P < 0.001) has been found between the number of contaminations of bulk tank milk samples with mastitis pathogens and bulk tank milk somatic cell counts. The relationship allows the determination of the probability of finding relevant mastitis pathogens in bulk tank milk samples with different levels of bulk tank milk SCC. A 63% probability can be defined at a cell count level of 400 000/ml and 20% at a cell count level of 100 000/ml. Analysis may reveal the potential sources of the bulk tank milk sample contamination, i.e. infected mammary glands or the environment. The presence of high levels of contamination along with a low bulk tank SCC may suggest an environmental source of contamination. The study clarified that a potential source of bulk tank milk contamination by relevant pathogens (the environment or the mammary gland) may be elucidated and the probability of the contamination of bulk tank milk samples with mastitis pathogens predicted by the analysis of relationship between the bulk tank milk somatic cell counts and the number of mastitis pathogen contaminations.

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Section: Discussionmentioning

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Bulk tank milk somatic cell count and sources of raw milk contamination with mastitis pathogens

Rysanek¹,

Babák²,

Zouharová³

2007

Vet. Med. - Czech

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“…Moreover, the mammary gland of dairy cows is particularly susceptible to infection at the cessation of lactation and again at the onset of the next lactation (Goff and Horst, 1997;Mallard et al, 1998). To prevent new infections during the DP and to reduce prevalent intramammary infection rates, treatment with antibiotic infusion is a recognised method to improve mammary gland health (Eberhart, 1986;Schukken et al, 1993;Barkema et al, 1998;McDougall, 2003). Bradley et al (2003) discussed various aspects of the design, prescription, use and monitoring of selected antibiotic dry-cow treatment.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…Besides dry-cow treatment, other management factors during the dry-cow period have a crucial impact on udder health (Eberhart, 1986;Schukken et al, 1993;Barkema et al, 1998;McDougall, 2003;Green et al, 2007). The most comprehensive list of cow, farm and management factors was assembled by Green et al (2007Green et al ( , 2008.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

A comparison of somatic cell count between organic and conventional dairy cow herds in West Germany stressing dry period related changes

Müller

Sauerwein

2010

Livestock Science

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“…Além disso, a secagem gradual reduz a produção de leite antes da ordenha final, especialmente em vacas leiteiras de alta produção(RAJALA-SCHULTZ et al, 2018). quantidades de queratina que protege o canal, o que aumenta risco de patógenos serem introduzidos na GM(BODDIE;NICKERSON, 1986;MCDOUGALL, 2003). Por outro lado, valores de ECC muito baixos podem indicar uma nutrição inadequada, tornando as vacas mais suscetíveis à ocorrência de mastites.…”

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>b<Eficácia do selante interno de tetos na secagem de vacas leiteiras sobre a saúde do úbere>/b<

Freu¹

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Primeiramente agradeço a Deus, pela dádiva da vida e por me dar discernimento e força durante todas as etapas deste estudo. Obrigado por me permitir errar, aprender e crescer. Agradeço também pelas vacas, obras de sua criação e que se tornaram uma paixão pra mim e fruto de meu trabalho. À minha família, que apesar da distância, jamais me deixaram faltar amor, carinho, companheirismo e confiança. Vocês souberam entender minhas ausências, souberam compreender e me apoiar durante os momentos de dificuldade, mas também vibraram comigo todas as minhas conquistas. Obrigado mãe, pai e irmão por cada palavra de incentivo e apoio, amo vocês! À minha namorada Larissa, a joia que a vida me presenteou, a quem admiro e sou muito grato. Obrigado por suportar e ser paciente durante os momentos de angústia e tristeza. Tua companhia, teu abraço, teu amor e palavras de carinho amenizaram a dor e abrilhantaram meus dias. Ao meu orientador Prof. Marcos Veiga dos Santos, pela confiança, por todas as oportunidades e pela orientação. O senhor é um grande incentivador e responsável pelo meu crescimento pessoal e profissional. Sem dúvidas contribuíste muito para que mais um de meus êxitos (a finalização desta dissertação) fosse possível.

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Management factors associated with the incidence of clinical mastitis over the non-lactation period and bulk tank somatic cell count during the subsequent lactation

Abstract: Dairy cows, mastitis, dry-cow therapy, somatic cell count, management practices.

Cited by 22 publications

References 27 publications

Bulk tank milk somatic cell count and sources of raw milk contamination with mastitis pathogens

Bulk tank milk somatic cell count and sources of raw milk contamination with mastitis pathogens

A comparison of somatic cell count between organic and conventional dairy cow herds in West Germany stressing dry period related changes

>b<Eficácia do selante interno de tetos na secagem de vacas leiteiras sobre a saúde do úbere>/b<

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