Now showing items 1-20 of 22

    • Cystic ovaries in dairy cows 

      Nebel, Raymond Lee, 1953- (Virginia Cooperative Extension, 1994)
      Although cystic ovarian disease is one of the oldest recorded diseases in dairy cattle, it remains a major problem in many dairies.
    • Environmental streptococcal and coliform mastitis 

      Jones, G. M. (Gerald Murray), 1941-; Swisher, Jerry M., 1949- (Virginia Cooperative Extension, 1998)
      Cows in low SCC herds are most susceptible to environmental streptococci and coliform infections after drying off and just prior to calving, but which appear in early lactation.
    • Environmental Streptococcal and Coliform Mastitis 

      Jones, G. M. (Gerald Murray), 1941-; Swisher, Jerry M., 1949- (Virginia Cooperative Extension, 2009-05-01)
      Today, many well-managed farms that have successfully controlled contagious mastitis and consistently produce milk with somatic cell counts (SCC) below 300,000 have problems with increased clinical mastitis.
    • Environmental Streptococci and Enterococcus spp.: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Currin, John F. (Virginia Cooperative Extension, 2012-07-12)
      Many milk culture laboratories across the United States do not distinguish between environmental streptococci and Enterococcus spp. However, this document will address the inherent differences between these pathogens as ...
    • Escherichia coli: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Currin, John F. (Virginia Cooperative Extension, 2011-07-29)
      Escherichia coli are Gram-negative bacteria, similar in structure to Klebsiella spp. E. coli mastitis is typically associated with a quick onset and often severe clinical signs.
    • Guidelines for Using the DHI Somatic Cell Count Program 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 2009-05-01)
      Somatic cell counts from a day's milk is the best indicator of the extent to which the gland is involved in fighting a mastitis infection.
    • Guidelines to Culling Cows with Mastitis 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 2009-05-01)
      Culling is often the most practical means for eliminating cows chronically infected with mastitis. Cows with persistent high SCC and especially those that carry over from one lactation to another are prime considerations ...
    • Handling a Herd Mastitis Problem 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 2009-05-01)
      Discusses causes and prevention of herd mastitis problems.
    • Handling mastitis problem herds 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 1992)
      Mastitis prevention is the most important ingredient in mastitis control. Preventative measures include attention to all details.
    • Klebsiella spp.: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Mullarky, Isis K.; Currin, John F. (Virginia Cooperative Extension, 2011-07-29)
      Klebsiella spp. are environmental organisms. The most common, mastitis-causing species are Klebsiella pneumoniae and K. oxytoca, but treatment and control is similar for all species of Klebsiella.
    • Mycoplasma in Dairy Cattle 

      Currin, John F.; Whittier, W. Dee; Currin, Nancy (Virginia Cooperative Extension, 2009-05-01)
      Mycoplasma is a tiny bacterium that can cause mastitis, metritis, pneumonia, drooped ears, and lameness in dairy cattle. While this bacterium has existed for more than 100 years, the current disease has only recently become ...
    • Proper Dry Cow Management Critical for Mastitis Control 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 2009-05-01)
      Discusses several components of an effective mastitis control program. Dry cow therapy has several advantages over lactation therapy.
    • Proper dry cow management critical for mastitis control 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 1998)
    • Reference Guide for Mastitis-Causing Bacteria 

      Petersson-Wolfe, Christina S.; Currin, John F. (Virginia Cooperative Extension, 2010-06-10)
      Lists types, source, control and treatment of mastitis-causing bacteria.
    • Serratia spp.: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Costello, Sandy; Currin, John F. (Virginia Cooperative Extension, 2011-07-29)
      Serratia spp. are Gram-negative bacteria that are similar in structure to Escherichia coli and Klebsiella spp. Serratia is resistant to most antibiotics; therefore, cure rates are very limited.
    • Staphylococcus aureus Mastitis: Cause, Detection, and Control 

      Petersson-Wolfe, Christina S.; Mullarky, Isis K.; Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 2010-06-11)
      Staphylococcus aureus (S. aureus) mastitis is extremely difficult to control by treatment alone. To date, successful control is gained only through prevention of new infections and culling of infected animals.
    • Staphylococcus aureus: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Mullarky, Isis K.; Currin, John F. (Virginia Cooperative Extension, 2011-07-29)
      Staphylococcus aureus (S. aureus) mastitis is extremely difficult to control by treatment alone. To date, successful control is gained only through prevention of new infections and culling of infected animals.
    • Streptococcal mastitis 

      Jones, G. M. (Gerald Murray), 1941- (Virginia Cooperative Extension, 1992)
      For years, streptococci were the most prevalent causes of mastitis. This publication discusses Strep agalacitiae, Strep uberis, and Strep dysgalactiae.
    • Streptococcus agalactiae: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Currin, John F. (Virginia Cooperative Extension, 2012-07-19)
      Strep. agalactiae is a contagious mastitis pathogen spread from cow to cow at milking. Proper milking procedures, including the use of efficacious pre- and post-milking teat disinfectants, will help to reduce the number ...
    • Streptococcus dysgalactiae: A Practical Summary for Controlling Mastitis 

      Petersson-Wolfe, Christina S.; Currin, John F. (Virginia Cooperative Extension, 2012-07-12)
      Streptococcus dysgalactiae is considered both a contagious and an environmental pathogen. These organisms can spread from cow to cow at milking time and are also commonly found in the cow's environment.