It is associated with straw bedding during a dry period.
What does Strep uberis do to the milk?
Why is Strep uberis difficult to treat?
it is an intracellular bacteria. It gets opsonized which limits phagocytosis.
Which of the following statements about Staphylococcus aureus mastitis is FALSE? a. SA can cause gangrenous mastitis b. SA is the most common cause of subclinical mastitis c. SA mastitis responds well to antimicrobials d. SA lives in micro abscesses e. SA lives in white blood cells
c. SA mastitis responds well to antimicrobials
Which organism causes mastitis that responds well to intramammary treatment? a. S. aureus b. Mycoplasma c. S. agalactiae d. E coli e. Prototheca
c. S. agalactiae
You are presented with a cow with S. uberis mastitis. The most likely source of the infection is....
Which of the following is NOT an environmental mastitis pathogen? a. E coli b. Arcanobacterium pyogenes c. Mycoplasma spp. d. Pseudomonas e. Klebsiella
Which of the following organisms is commonly associated with endotoxin production following mastitis? a. Mycoplasma spp. b. Arcanobacterium c. Klebsiella d. Staph aureus e. Prototheca spp
You isolate Mycoplasma from a cow with mastitis. The most likely source of the infection is: a. sawdust bedding b homemade udder infustions c. contaminated water d. distillers grains e. infected cows and calves
e. infected cows and calves
How long does it take for the teat sphincter to close after milking?
Which of the following is NOT a cytotoxin produced by Staph aureus? a. lipopolysaccharide b. leukocidin c. Protein A d. Staphylokinase e. Alpha-toxin
Damage to the teat ending is commonly associated with....?
What are the goals related to preventing mastitis?
Minimize damage to teat/teat ending due to milking Minimize bacterial colonization of teat ending during milking Reduce risk of bacteria entering open canal.
Which of the following is the cheapest and most reliable way of diagnosing sub-clinical mastitis? Udder palpation Visualization of milk for flakes and clots Gel formation on CMT Culture on MacConkey's Agar Changes in electrical conductivity
Gel formation on CMT
Which of the following is NOT a critical control point to prevent environmental mastitis? Dry Cow management Transitional cow management Clean udders at milking Clean dry comfortable cows Prevent teat ending/ skin lesions and bacterial colonization
Prevent teat ending/ skin lesions and bacterial colonization
What are the possibilities if there is no growth on a culture?