Streptococcus Spp. Isolated Subclinical Mastitis and Its Effect on Public Health

The high protein content of milk makes it a crucial component of human nutrition. The mammary tissue of dairy cattle is seriously harmed by the severe disease known as mastitis. Mastitis is a widespread and economically significant infectious disease that affects dairy cows globally. One of the most frequent causes of subclinical mastitis in dairy cows and one of the most frequent indications for antibiotic therapy is Streptococcus spp. The purpose of the study was to investigate into the presence of Streptococcus spp. isolates in subclinical mastitis bovine milk. The presence of subclinical mastitis was investigated in 77 dairy animals. After the evaluation, 32 (41.5%) dairy animals showed positive results. Streptococcus spp. was detected in nine isolates (19.50%). As a result, it has been demonstrated that Streptococcus spp. still plays a significant role in the etiology of subclinical mastitis. This has the potential to present an important concern for public health.

Keywords:

Dairy animals, Milk, Subclinical mastitis Streptococcus spp,

PDF

___

Duarte C.M., Freitas P.P., Bexiga R. Technological advances in bovine mastitis diagnosis: an overview. Journal of Veterinary Diagnostic Investigation, 27(6), (2015), 665-672.
Korhonen H.J., Kaartinen L. (1995). Changes in the composition of milk induced by mastitis. In: M. Sandholm (Ed) The Bovine Udder and Mastitis. Univ. Helsinki, Helsinki, Finland.
Halasa T., Huijps K., Østerås O., Hogeveen H. Economic effects of bovine mastitis and mastitis management: A review. Veterinary Quarterly, 29(1), (2007), 18-31.
Hogeveen H., Huijps K., Lam T. Economic aspects of mastitis: new developments, New Zealand Veterinary Journal, 59(1), (2011), 16-23.
Coffey T.J., Pullinger G.D., Urwin R., Jolley K.A., Wilson S.M., Maiden M.C., Leigh J.A. First insights into the evolution of Streptococcus uberis: a multilocus sequence typing scheme that enables investigation of its population biology. Applied and Environmental Microbiology, 72(2), (2006), 1420-1428.
Tian X., Zheng N., Han R., Ho H., Wang J., Wang Y., Wang S., Li H., Liu H., Yu Z. Antimicrobial resistance and virulence genes of Streptococcus isolated from dairy cows with mastitis in China. Microbial Pathogenesis, 131, (2019), 33-39.
Elhaig M.M., Selim A. Molecular and bacteriological investigation of subclinical mastitis caused by Staphylococcus aureus and Streptococcus agalactiae in domestic bovids from Ismailia, Egypt. Tropical Animal Health and Production, 47, (2015), 271-276.
Keefe G.P. Streptococcus agalactiae mastitis: a review.The Canadian Veterinary Journal, 38(7), (1997), 429.
Sharma A., Chhabra R., Sindhu N. Prevalence of sub clinical mastitis in cows: Its etiology and antibiogram. Indian Journal of Animal Research, 46(4), (2012), 348-353.
Lundberg Å., Nyman A., Aspán A., Börjesson S., Unnerstad H.E., Waller K.P. Udder infections with Staphylococcus aureus, Streptococcus dysgalactiae, and Streptococcus uberis at calving in dairy herds with suboptimal udder health. Journal of Dairy Science, 99(3), (2016), 2102-2117.
Gonçalves J., Kamphuis C., Martins C., Barreiro J., Tomazi T., Gameiro A.H., Hogeveen H., Dos Santos M. Bovine subclinical mastitis reduces milk yield and economic return. Livestock Science, 210, (2018), 25-32.
Bobbo T., Ruegg P., Stocco G., Fiore E., Gianesella M., Morgante M., Pasotto D., Bittante G., Cecchinato A. Associations between pathogen-specific cases of subclinical mastitis and milk yield, quality, protein composition, and cheese-making traits in dairy cows. Journal of Dairy Science, 100(6), (2017), 4868-4883.
Kumari T., Bhakat C., Choudhary R.K. A review on subclinical mastitis in dairy cattle. International Journal of Pure & Applied Bioscience, 6(2), (2018), 1291-1299.
Hillerton J.E., Berry E.A. The management and treatment of environmental streptococcal mastitis. Veterinary Clinics: Food Animal Practice, 19(1), (2003), 157-169.
Schalm O. Experiments and observations leading to development of the California Mastitis Test. Journal of the American Veterinary Medical Association, 130, (1957), 199-204.
National Mastitis Council (1999) Laboratory Handbook on Bovine Mastitis. National Mastitis Council, Madison, WI.
Quinn P., Markey B.K., Carter M., Donnelly W., Leonard F., (2002): Veterinary microbiology and microbial disease, Blackwell science
Kaczorek E., Małaczewska J., Wójcik R., Rękawek W., Siwicki A. Phenotypic and genotypic antimicrobial susceptibility pattern of Streptococcus spp. isolated from cases of clinical mastitis in dairy cattle in Poland, J. Dairy Sci. 100(8), (2017), 6442-6453.
Kabelitz T., Aubry E., van Vorst K., Amon T., Fulde M. The role of Streptococcus spp. in bovine mastitis, Microorganisms 9(7), (2021), 1497.