If you suspect clostridial diarrhea in a dog, which drug would u use for tx? (caused by clostridium perfringens)
How does Nocardia asteroides appear in a gram stain?
like a beady staining Gram + branching filament on a pink background
Case: bovine mastitis smear show Nocardia, would you use penicillin for tx?
NO, use TMS or Tetracyclin instead
Case: A steer w a deep wound in the pecs due to running into a fence post. The wound is moderately infected. You see purulent material that did not grow on McConkey. What is the expected gram stain result? If you see that the colony morphology is pin-point like, what other test could you use to differentiate the species?
Gram + (because these do not grow on McConkey), Can do a Catalase test to differentiate Trueperella from Erysipelothrix BUT if you look at the species affected, you'll see that Trueperella is most likely
What percentage of KOH will you use to differentiate Gram + from Gram -?
3 % KOH
If the KOH test was positive? What gram stain would u expect?
Gram - (the negatives are positives in KOH)
What does a + KOH test look like?
A gel formation = +
What percentage of KOH would you use on a Hair sample?