Important differential Test Flashcards
Differential test positive and negative for Catalase test
Staphylococcus (+)
Streptococcus (-)
Differential test positive and negative for Novobiocin Susceptibility
S. epidermidis (Sensitive)
S. saprophyticus (Resistant)
Differential test positive and negative for Oxidase
Micrococcus (+)
Staphylococcus (-)
Differential test positive and negative for Oxidase (2)
for rod shaped
(+) Vibrio, Non-fermentative (Pseudomonas)
(-) Enterobacteriaceae
Differential test positive and negative oxidase (3)
For bacillus
(+) Alcaligenes (motile)
(-) Acinetobacter (non-motile) and Stenotrophomonas (motile)
Differential test positive and negative bile solubility test, neufel-quellung
(+) S. pneumoniae
(-) Viridans streptococci
Differential test positive and negative camp test
(+) S. agalactiae
(-) Beta hemolytic streptococci
Differential test positive and negative salt tolerance test
(+) Enterococcus
(-) Non-enterococcus
Differential test positive and negative lysozyme sensitivity
(+) Streptomyces
(-) Nocardia
Differential test positive and negative nitrate reduction
(+) M. fortuitum
(-) M. chelonei
Differential test positive and negative Niacin
(+) M. tuberculosis
(-) M. bovis
Differential test positive and negative acetate utilization
(+) E. coli
(-) Shigella
Differential test positive and negative indole (1)
Klebsiella
(+) K. oxytoca
(-) K. pneumoniae
Differential test positive and negative indole (2) .
proteus
(+) P. vulgaris (OX 2, 19)
(-) P. mirabilis
Differential test positive and negative for lysine decarboxylation
(+) Salmonella (NLF)
(-) Citrobacter (LF)
Differential test positive and negative 42 deg C growth (bacteria)
(+) P. aeruginosa
(-) P. fluorescens
Differential test positive and negative 42 deg C growth, Indoxyl acetate
(+) C. jejuni
(-) H. pylori
Differential test positive and negative Urease (1)
(+) B. bronchiseptica
(-) A. faecalis
Differential test positive and negative urease (2)
(+) H. pylori
(-) C. jejuni
Differential test positive and negative urease (3) corynebacterium
(+) C. ulcerans, C. pseudotuberculosis
(-) C. diphtheriae
Differential test positive and negative Sorbitol MAC and MUG test
(+) all strains of E. coli except
(-) E. coli O157:H7
Differential test positive and negative Malonate utilization test
(+) Salmonella (arizona) subgroup 2 and 3
(-) The rest of Salmonella
Differential test positive and negative Mannitol fermentation (Shigella)
(+) other Shigella (boydii, flexneri, sonnei)
(-) S. dysenteriae
Differential test positive and negative casein hydrolysis
(+) Nocardia brasiliensis
(-) Nocardia asteroides
Test to differentiate Serratia and Cedecea
DNAse
(+) Serratia spp
(-) Cedecea spp
TEST TO DIFFERENTIATE Plesiomonas and Aeromonas
DNAse
(+) Aeromonas
(-) Plesiomonas
Differential test positive and negative Oxidase
Yersinia and Aeromonas
(+) Aeromonas
(-) Y. enterocolitica
Differential test positive and negative string test
(+) Vibrio
(-) Aeromonas
Differential test positive and negative motility
(+) Burkholderia cepacia (oxidase+)
(-) Chryseobacterium (oxidase+)
Differential test positive and negative beta hemolysis
(+) Kingella kingae
(-) Eikenella corrodens
Differential test positive and negative motility and beta hemolysis
(+) B. cereus
(-) B. anthracis
Differential test positive and negative T2H susceptibility (Thiophene)
(+) M. tuberculosis (sensitive)
(-) All other mycobacterium
Differential test positive and negative rice medium
(+) Microsporum canis
(-) M. audoinii
Differential test positive and negative hair baiting test
(+) T. mentagrophytes (V-shape)
(-) T. rubrum
Differential test positive and negative germ tube
(+) C. albicans and C. dubliniensis (no constriction)
(-) C. tropicalis
Differential test positive and negative 42 deg C growth (mycology)
(+) C. albicans
(-) C. dubliniensis
