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The Importance of Corynebacterium Bovis Causing Mastitis
Sâmea Fernandes Joaquim, Felipe Morales Dalanezi, Rodrigo Costa da Silva and Helio Langoni*
Department of Veterinary Hygiene and Public Health, Universidade Estadual Paulista, Brazil
Submission: February 28, 2017;March 02, 2017 Published:February 06, 2017
*Corresponding author: Helio Langoni, Department of Veterinary Hygiene and Public Health, School of Veterinary Medicine and Animal Sciences, Universidade Estadual Paulista, Botucatu, São Paulo State, Brazil,Email: fmvz.unesp.br
How to cite this article: Sâmea F J, Felipe M D, Rodrigo C d S, Helio L. The Importance of Corynebacterium Bovis Causing Mastitis. Dairy and Vet Sci J. 2017; 1(3): 555561. DOI: 10.19080/JDVS.2017.01.555561
Bovine mastitis is the most frequent disease in dairy farms and cause several economic losses. Coryne bacterium bovis is a common agent of intra-mammary infections. This pathogen presents less importance for many researchers but there are many reasons to evaluate its participation as an important etiological pathogen of mastitis, such as the occurrence of this microorganism in the etiology of the bovine mastitis, effects on milk production and in somatic cell count (SCC).
Keywords:Coryneform bacteria; Milk production; Etiology of mastitis; Intra-mammary infections
Mastitis is the most important cause of economic losses in dairy farms worldwide. Besides, this disease has a high relevance to public health by direct transmission of food borne pathogens and/or the ingestion of the produced toxins and enterotoxins [1,2].
The most frequent etiological agents of bovine mastitis are Staphylococcus aureus, coagulase negative Staphylococcus, Streptococcus agalactiae, Streptococcus dysgalactiae, Streptococcus uberis, Escherichia coli, and Corynebacterium bovis (C. bovis) .
There are many conflicts concerning the relevance of C. bovis as the etiological agent of mastitis. Many authors consider C. bovis either as a commensal pathogen of the udder and a pathogen of less importance [4-6], while other studies described this microorganism as an important causative agent of mastitis [7-10].
There are many aspects to reinforce the importance of C. bovis in mammary disease. One of them is the high frequency of isolation, such as reported by Haltia et al. ; Costa et al.  ; Langoni et al. ; with 22,74%, 15,94% and 14,6%, respectively. In addition, 23,5% reduction in the production of the quarters infected can be observed , affecting the production and the development of dairy farms [13,14].
The effect of C. bovis on somatic cells count (SCC) has also to be considered, once studies showed higher in the quartersinfected when compared with healthy quarters [14-16]. Victória et al.  observed medians of SCC equal to 262x10³cells/mL and 806x10³cells/mL, respectively in milk samples negative and positive to C. bovis from naturally infected mammary glands and even some cases resulted 1x106cells/mL. Langoni et al.  showed clinical and subclinical cases of mastitis caused by C. bovis, and one of them have more than 8x106cell/mL.
The role of the C. bovis in bovine mastitis is poorly understood yet, but there are many evidences to complain that. Nowadays, C. bovis has an important participation as an etiological pathogen of mastitis, due its high prevalence causing mastitis, decrease in milk production and increase of SCC in the quarters affected by this coryne form bacteria..