Some Observations on the Bacterial Flora of the Bovine Tonsil

Daleel, E. E.; Frost, A.J.

doi:10.1016/s0007-1935(17)39953-0

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…Consequently the bacteria are usually transmitted between udder quarters during milking via the milker's hands, the milking cluster, udder cloths, etc. Extramammary sources do exist, notably the vagina and tonsils (41), but these are relatively unimportant in the pathogenesis of infection. The dependence of the disease upon mammary sources was shown by White (226) many years ago when he eliminated staphylococcal mastitis from a herd essentially by controlling transmission at milking time combined with culling and antibiotic therapy.…”

Section: Aetiology Of Mastitismentioning

confidence: 99%

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Bramley

Dodd

1984

Journal of Dairy Research

213

115

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Introduction Development of control methods Antibiotic therapy Hygiene Control schemes Milking machine research Mastitis awareness The value of current control methods Aetiology of mastitis Staphylococcus aureus Streptococcus agalactiae Streptococcus dysgalactiae Streptococcus uberis Coliforms Pseudomonas aeruginosa Mycoplasma bovis Corynebacteria General characteristics of bovine mastitis Stages in the infection process Exposure to pathogenic microorganisms CONTENTS PAGE 481 482 482 483 483 484 484 485 486 486 486 487 487 487 488 488 488 489 489 490 Penetration of the teat duct by pathogens Establishment of an intramammary infection Parasite factors Host factors Cellular and immune defence of the udder Nonspecific defence mechanisms Elimination of infections Culling Spontaneous recovery from infection Antibiotic therapy Dynamics of infection in dairy herds Effects of mastitis monitoring systems on awareness and control Conclusions References * Grant aided by the Agricultural and Food Research Council.

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Section: Aetiology Of Mastitismentioning

confidence: 99%

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Bramley

Dodd

1984

Journal of Dairy Research

213

115

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“…agalactiae ( n = 3). Daleel and Frost [ 36 ] examined tonsils of 300 healthy slaughtered cattle and 100 calves. Of the 293 identified strains of bacteria, 7.3% were attributed to Sc.…”

Section: Discussionmentioning

confidence: 99%

“…The mammary gland is considered as the main reservoir [ 40 ]. However, S. aureus has been previously detected in tonsils of calves and in the oral cavities of intersucking heifers [ 36 , 41 ]. The detection can probably be attributed to the ingestion of infected milk [ 36 , 42 ].…”

Section: Discussionmentioning

confidence: 99%

Investigations on Transfer of Pathogens between Foster Cows and Calves during the Suckling Period

Köllmann

Wente

Zhang

et al. 2021

Animals

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To date, there have been few studies on the health effects of foster cow systems, including the transmission of mastitis-associated pathogens during suckling. The present study aimed to compare the pathogens detected in the mammary glands of the foster cow with those in the oral cavities of the associated foster calves and to evaluate the resulting consequences for udder health, calf health and internal biosecurity. Quarter milk sampling of 99 foster cows from an organic dairy farm was conducted twice during the foster period. Oral cavity swabs were taken from 345 foster calves. Furthermore, quarter milk samples were collected from 124 biological dams to investigate possible transmission to the foster cows via the suckling calves. All samples were microbiologically examined and confirmed by MALDI-TOF (matrix-assisted laser desorption time-of-flight mass-spectrometry). Using RAPD-PCR (randomly amplified polymorphic DNA polymerase chain reaction), strain similarities were detected for Pasteurella multocida, Staphylococcus aureus, S. sciuri and Streptococcus (Sc.) suis. Transmission of P. multocida and S. aureus probably occurred during suckling. For S. sciuri and Sc. suis, environmental origins were assumed. Transmission from dam to foster cow with the suckling calf as vector could not be clearly demonstrated.

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“…Starting from the oral and lips mucosae, the pathogen is distributed via licking into the environment, including fur and epidermis of other cows. Furthermore, bovine faeces (and with that, the intestinal mucosa) also contribute strongly to its dissemination in the environment [36][37][38][39][40][41][42][43][44][45]. Despite the detection of S. uberis in bovine teat canals, it remains unclear if-unlike cow-associated mastitis pathogens like Staphylococcus (S.) aureus and S. agalactiae-the environmental-associated pathogen S. uberis is able to colonize the teat canal epithelium [46][47][48].…”

Section: Epidemiology Habitats and Reservoirsmentioning

confidence: 99%

Bovine Streptococcus uberis Intramammary Infections and Mastitis

Krömker¹

2014

Clin Microbial

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Streptococcus (S.) uberis is a causative agent for clinical and subclinical bovine mastitis which significance for the udder health has increased over the last decades. Molecular diagnosis methods revealed that S. uberis may be subdivided into many different varieties with different epidemiological properties. In addition, some varieties were reclassified as Streptococcus parauberis and Globicatella sanguinis. The present paper reviews S. uberis and its role in modern dairy farming. This pathogen is ubiquitous for which it is considered as environment-associated. Straw bedding and pasture, but also the bovine skin and digestive mucosae are typical localizations inhabited by S. uberis. Due to its capacity to persist within the mammary tissue, some infections may eventually turn cow-associated. In other cases, the infection is short, but in any case, there is a high risk of re-infection. Although many varieties remain susceptible to most antimicrobial agents, the problem for the dairy farm lies in the high rate of re-infection. This paper also reviews risk factors, therapies and measures to control S. uberis at farm level.

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Some Observations on the Bacterial Flora of the Bovine Tonsil

Cited by 13 publications

References 11 publications

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Reviews of the progress of Dairy Science: Mastitis control – progress and prospects

Investigations on Transfer of Pathogens between Foster Cows and Calves during the Suckling Period

Bovine Streptococcus uberis Intramammary Infections and Mastitis

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