Which Clostridium spp is most commonly recovered from cases of gas gangrene?

Organisms that grow best with greater carbon-dioxide concentrations than are found in ambient air are called

The following are reported on a given work day:1. Observation of AFB organisms on direct smear of a sputum2. Identification of Neisseria gonorrhoeae from a genital specimen of a female outpatient3. Positive findings of Entamoeba histolytica trophozoites and cyst forms4. Oxacillin resistance noted in a Staphylococcus aureus isolate from an inpatientAll require what additional step?

A clean catch urine cultured using 0.01 ml calibrated loop grew 60 colonies.  What is the correct CFU/ml

A  yellow colony from a skin lesion grew aerobically. It was a gram positive cocci, catalase positive, coagulase negative.  A modified oxidase test was performed and it was positive.  The most likely organism is

The mycobacterial isolated most closely associated with enteric infections in patients with acquired immune deficiency syndrome would be

Purulent material is obtained from a carbuncle and submitted for bacterial culture. The direct smear reveals many gram-positive cocci and WBCs. The culture shows growth in the primary broth and on the sheep-blood agar plate and no growth on the MacConkey agar plate. The colonies on the blood-agar plate are butyrous and beta-hemolytic. The catalase test is positive and modified oxidase test is negative. Although the slide coagulase test is negative, the tube coagulase test is positive. The most probable identity of this isolate is

When combination antibiotic therapy is used:

The causative agent of Q fever is

Both blood and urine cultures are positive for an oxidase-negative, NLF gram-negative rod with a reddish pigment. Biochemical reactions include the following:TSI: K/A, gas +, H2S negIndole: neg, Citrate: pos, Motility: pos, Lysine decarboxylase: pos, Ornithine decarboxylase: posThe opportunistic pathogen that shows these reactions is