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Mastitis Case Studies
Resource Library


This resource is a collection of information related to mastitis. Many of these include a discussion on the relevance to mastitis. Look under the headings below and choose the term that is closest to your topic of interest.

See the Mastitis Detective Cases for practice case studies of herd mastitis problems. These cases were adapted from real mastitis cases solved by Dr. Dawn Morin, University of Illinois. Some of the images in this resource are also from Dr. Morin.


Mastitis clinical syndromes
  • Clinical mastitis
  • Peracute mastitis
  • Acute mastitis
  • Subacute mastitis
  • Chronic mastitis
  • Subclinical mastitis
Types of mastitis
  • Contagious
  • Environmental
  • Teat skin to udder
  • Mouth to udder
  • Flies
Detection of mastitis
  • Udder palpation
  • Visualization of milk
  • Somatic cell count (SCC)
  • Bulk tank
  • Bulk tank bacterial counts
  • California Mastitis Test (CMT)
  • Electrical conductivity
Mastitis treatment & control
  • Antibiotic treatments
  • Intramammary infusions
  • Oxytocin treatment
  • Non-responding cases
  • Control - contagious
  • Control - environmental
  • Vaccines for mastitis
  • Approaches to Herd Problems
Major mastitis pathogens
  • Esherichia coli
  • Klebsiela species
  • Mycoplasma
  • Prototheca, yeasts
  • Pseudomonas spp
  • Staphylococcus aureus
  • Streptococcus agalactiae
  • Streptococcus uberis and other Strep spp.
Bacterial culture
  • Sterile milk sample collection
  • Bacterial culture of milk samples
  • Antibiotic sensitivity
Milk composition & quality
  • Milk composition
  • Grade A milk
  • Bulk tank bacterial counts
  • Somatic cell count
  • Antibiotic residues
  • Premium payments
Susceptibility to mastitis
  • Determinants of mastitis
  • Inflammation - what happens
  • Ability to resist mastitis
Disease resistance
  • Immunology of mammary gland
  • Physical barriers
  • Humoral immunity
  • Cellular immunity
  • Phagocytosis
  • Endotoxin-induced mastitis
Milking machine
  • Milking machine
  • Teat cups and liners
  • Claw, vacuum tubes, milk tubes
  • Pulsator, rate, ratio
  • Teat end vacuum
  • Liner squawks
  • Milk line
  • Vacuum fluctuations
  • Automatic take-offs
Milking process
  • Gloves
  • Teat preparation
  • Teat dip germicides
  • Drophoses
  • Milk letdown
  • Udder hair
  • Foremilk stripping
  • Machine-on time
  • Post-milking teat dip
  • Teat health
Housing and environment
  • Herd location
  • Barn and stall design
  • Bedding
  • Exercise area
  • Herd size
  • Season/weather
  • Pasture, creeks, ponds
  • Parlor design
Cow management
  • Dry cows
  • Nutrients and mastitis
  • Culling cows
  • Purchasing cows
  • TMR
  • DHIA records
  • Rolling herd average
Dry period and mastitis
  • Mammary physiology
  • Active involution
  • Steady state involution
  • Redevelopment & colostrogenesis
Study questions & references
  • Study Questions
  • References

Click here to view a Mastitis Practice Quiz.

Mastitis Case Studies

Information contained herein is subject to change without notice.
Copyright® 2009 by Walter L. Hurley, University of Illinois, Urbana-Champaign