MICROBIOLOGY ASCP EXAM 2025/2026 REAL EXAM
EXPERT VERIFIED ANSWERS WITH RATIONALES
INCLUDED LATEST UPDATE
Cytochrome oxidase positive, DNAse negative, ornithine positive and is associated with
gastroenteritis in children is -CORRECTANSWER Plesiomonas shigelloides
Fusarium -CORRECTANSWER Likely to cause mycotic Keratitis
Saccharomyces cerevisae -CORRECTANSWER Bakers yeast
Presumptive test for ID of Lancefield group A strep is -CORRECTANSWER Bacitracin
susceptibility
Moraxella lacunata -CORRECTANSWER Conjungtivitis
Blue color on simmons citrate -CORRECTANSWER production of ammonia from
ammonium phosphate
If bacteria produces tryptophanase to break down the A.A. tryptophan, which is positive
for Kovacs reagent -CORRECTANSWER Indole test
Klebsiella oxytoca -CORRECTANSWER weak urease positive
,Necator Americanus -CORRECTANSWER
Morganella morganii -CORRECTANSWER non lactose fermenter (not pink on
MacConkey
Class II or higher BSC -CORRECTANSWER must be used for bioterrorism agents
alpha napthalamine -CORRECTANSWER Nitrate
VP -CORRECTANSWER alpha naphthol
Indole -CORRECTANSWER aminobenzaldehyde
Phenylalamine deaminase -CORRECTANSWER ferric chloride
Bacillus Anthracis -CORRECTANSWER Ulcerating pustule, asia, animal hides
Fonsecaea pedrosoi -CORRECTANSWER Chromoblastosis, H&E stained sections of
tissue biopsy, Sclerotic bodies, Copper pennies,
Group A strep -CORRECTANSWER Zone of inhibition around bacitracin disk
, Serum medium and methylene blue stain originally described by Loeffler is helpful in -
CORRECTANSWER Corynebacterium diphtheriae
Mycobacterium Tuberculosis -CORRECTANSWER 2 weeks to grow, Rough looking
Mycobacterium Kansasii -CORRECTANSWER Develop pigment when exposed to light
(PHOTOCHROMIC)
Mycobacterium scrofulaceum -CORRECTANSWER Develop deep yellow (orange)
when incubated in the dark
Mycobacterium Fortuitum -CORRECTANSWER White or gray rapid growing 3 days
Elkenella corrodens -CORRECTANSWER Pitting of the agar, bleach smell,
Clostridium pefringens -CORRECTANSWER Boxcar, gas gangrene, anaerobe, non
spore forming
Hydrolysis of tyrosine, xanthine and casein -CORRECTANSWER Nocardia
E blattae -CORRECTANSWER Cockroaches
Edwarsella Tarda -CORRECTANSWER Reptiles
EXPERT VERIFIED ANSWERS WITH RATIONALES
INCLUDED LATEST UPDATE
Cytochrome oxidase positive, DNAse negative, ornithine positive and is associated with
gastroenteritis in children is -CORRECTANSWER Plesiomonas shigelloides
Fusarium -CORRECTANSWER Likely to cause mycotic Keratitis
Saccharomyces cerevisae -CORRECTANSWER Bakers yeast
Presumptive test for ID of Lancefield group A strep is -CORRECTANSWER Bacitracin
susceptibility
Moraxella lacunata -CORRECTANSWER Conjungtivitis
Blue color on simmons citrate -CORRECTANSWER production of ammonia from
ammonium phosphate
If bacteria produces tryptophanase to break down the A.A. tryptophan, which is positive
for Kovacs reagent -CORRECTANSWER Indole test
Klebsiella oxytoca -CORRECTANSWER weak urease positive
,Necator Americanus -CORRECTANSWER
Morganella morganii -CORRECTANSWER non lactose fermenter (not pink on
MacConkey
Class II or higher BSC -CORRECTANSWER must be used for bioterrorism agents
alpha napthalamine -CORRECTANSWER Nitrate
VP -CORRECTANSWER alpha naphthol
Indole -CORRECTANSWER aminobenzaldehyde
Phenylalamine deaminase -CORRECTANSWER ferric chloride
Bacillus Anthracis -CORRECTANSWER Ulcerating pustule, asia, animal hides
Fonsecaea pedrosoi -CORRECTANSWER Chromoblastosis, H&E stained sections of
tissue biopsy, Sclerotic bodies, Copper pennies,
Group A strep -CORRECTANSWER Zone of inhibition around bacitracin disk
, Serum medium and methylene blue stain originally described by Loeffler is helpful in -
CORRECTANSWER Corynebacterium diphtheriae
Mycobacterium Tuberculosis -CORRECTANSWER 2 weeks to grow, Rough looking
Mycobacterium Kansasii -CORRECTANSWER Develop pigment when exposed to light
(PHOTOCHROMIC)
Mycobacterium scrofulaceum -CORRECTANSWER Develop deep yellow (orange)
when incubated in the dark
Mycobacterium Fortuitum -CORRECTANSWER White or gray rapid growing 3 days
Elkenella corrodens -CORRECTANSWER Pitting of the agar, bleach smell,
Clostridium pefringens -CORRECTANSWER Boxcar, gas gangrene, anaerobe, non
spore forming
Hydrolysis of tyrosine, xanthine and casein -CORRECTANSWER Nocardia
E blattae -CORRECTANSWER Cockroaches
Edwarsella Tarda -CORRECTANSWER Reptiles
