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Mastitis Case Studies

Disease Resistance Mechanisms


This section has a few study questions on mastitis and some mastitis references.


Study Questions

1. What are the types of factors that might make this cow especially susceptible to mastitis?

Cow calving.

2. This blood agar plate contains a culture of Staphylococcus aureus. What clinical syndrome(s) does this organism typically cause? What type of mastitis does this organism cause? What types of factors might make a cow susceptile to infection by this organism? How might such an infection be prevented?

Staph aureus on bloodagar plate.Red arrow. Ayrshire cow.

3. This blood agar plate contains a culture of Escherichia coli. What clinical syndrome(s) does this organism typically cause? What type of mastitis does this organism cause? What types of factors might make a cow susceptile to infection by this organism? How might such an infection be prevented?

E. cole on bloodagar plate.Red arrow. Brwon Swiss cow.

4. What conditions or factors do you find in these images that might contribute to these cows getting mastitis?

Cow Cow standing in water.
Cows in muddy lot.

References

There is a wide literature on Mastitis. For general references on mastitis in dairy cattle, see:

National Mastitis Council, 1987 Laboratory and Field Handbook on Bovine Mastitis. W.D. Hoard and Sons Co., Fort Atkinson, WI.
National Mastitis Council, 1981 Microbiological Procedures for Use in Daignosis of Bovine Mastitis. National Mastitis Council, Inc. Washington, DC.

Batra, T. R. and A. J. McAllister. 1984. A comparison of mastitis detection methods in dairy cattle. Can. J. Anim. Sci. 64:305.
Brown, C. A., S. J. Rischette, and L. H. Schultz. 1986. Relationship of milking rate to somatic cell count. J. Dairy Sci. 69:850.
Eberhart, R. J., et al. 1987. Current concepts of bovine mastitis. The National Mastitis Council, 3rd ed., Arlington, VA.
Emanuelson, U., T. Olsson, O. Holmberg, M. Hageltorn, T. Mattila, L. Nelson, and G. Astrom. 1987. Comparison of some screening tests for detecting mastitis. J. Dairy Sci. 70:880.
Hogan JS, Smith KL, Todhunter DA, Schoenberger PS 1988. Growth responses of environmental mastitis pathogens to long-chain fatty acids. J. Dairy Sci. 71:245-249.
Jones, G. M., R. E. Pearson, G. A. Clabaugh, and C. W. Heald. 1984. Relationships between somatic cell counts and milk production. J. Dairy Sci. 67:1823.
LeVan, P. L., R. J. Eberhart, and E. M. Kesler. 1985. Effects of natural intramammary corynebacterium bovis infection on milk yield and composition. J. Dairy Sci. 68:3329.
McDonald, J. S. 1984. Streptococcal and staphylococcal mastitis. Sympos. Bovine Mastitis, Clin. North Am. Large Anim. Pract. 6:269.
Morin, D. E. et al. 1993. Economic analysis of mastitis monitoring and control program in four dairy herds. J. Am. Vet. Med. Assoc. 202:540.
Nickerson, S. C. 1993. Preventing new Staphylococcus aureus mastitis. Vet. Med. 88:368.
Paape M, Mehrzad J, Zhao X, Detilleux J, Burvenich C 2002 Defense of the bovine mammary gland by polymorphonuclear neutrophil leukocytes. J Mammary Gland Biol Neoplasia 7:109-122
Philpot WN, Nickerson SC 1991. Mastitis: Counter Attack. Babson Bros. Co., Naperville, IL
Politis, I. and K. F. Ng-Kwai-Hang. 1988. Effects of somatic cell count and milk composition on cheese composition and cheese making effeiciency. J. Dairy Sci. 71:1711.
Smith, K. L. 1983. Mastitis control: a discussion. J. Dairy Sci. 66:1790.
Sordillo LM, Streicher KL 2002 Mammary gland immunity and mastitis suceptibility. J Mammary Gland Biol Neoplasia 7:135-146
Anderson, K. L.(ed) 1993. Update on bovine mastitis. Vet. Clin. N. Amer. Food. Anim. Pract., Vol. 9, No. 3.


Mastitis Case Studies
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