After 48 hours of incubation on anaerobic sheep-blood agar, Clostridium perfringens appears as a  

  The presence of this anaerobe’s capsule alone can produce an abscess.

India ink preparations of CSF sediment are the best way to demonstrate _____. Hemophilus influenzae    budding Cryptococcus Pneumococci    Neisseria meningitidis

The Weil-Felix test which serologically is helpful for many Rickettsiae infections uses ____

All of the organisms in the Enterobacteriaceae are oxidase ________.

Mycobacterium tuberculosis stains readily with: a. Gram’s stain b. Papanicolaou stain c. Ziehl-Neelsen stain d. Wayson’s stain

39. Which of the following is most important to prevent the spread of infection?  (Coronavirus 😉 a. wearing a buttoned, clean cotton laboratory coat at all times in the laboratory b. using antiseptic cleaner to wash the countertops after completion of work c. double gloving when performing procedures that have a likelihood of blood splashing d.   washing hands vigorously with germicidal soap and water.    

A TSI slant with Pseudomonas aeruginosa growing on it will give a ___ reaction.

A bacteria that produces a characteristic purple pigment

40. A Staphylococcus species recovered from a wound (cellulitis) was negative for the slide coagulase test (clumping factor) and negative for novobiocin resistance.  The next test(s) needed for identification is (are): tube coagulase test beta-hemolysis on blood agar mannitol-salt agar plate all listed answers