Important differential Test Flashcards by pattie o.

Differential test positive and negative for Catalase test

Staphylococcus (+)
Streptococcus (-)

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Differential test positive and negative for Novobiocin Susceptibility

S. epidermidis (Sensitive)
S. saprophyticus (Resistant)

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Differential test positive and negative for Oxidase

Micrococcus (+)
Staphylococcus (-)

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Differential test positive and negative for Oxidase (2)

for rod shaped

(+) Vibrio, Non-fermentative (Pseudomonas)
(-) Enterobacteriaceae

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Differential test positive and negative oxidase (3)

For bacillus

(+) Alcaligenes (motile)
(-) Acinetobacter (non-motile) and Stenotrophomonas (motile)

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Differential test positive and negative bile solubility test, neufel-quellung

(+) S. pneumoniae
(-) Viridans streptococci

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Differential test positive and negative camp test

(+) S. agalactiae
(-) Beta hemolytic streptococci

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Differential test positive and negative salt tolerance test

(+) Enterococcus
(-) Non-enterococcus

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Differential test positive and negative lysozyme sensitivity

(+) Streptomyces
(-) Nocardia

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Differential test positive and negative nitrate reduction

(+) M. fortuitum
(-) M. chelonei

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Differential test positive and negative Niacin

(+) M. tuberculosis
(-) M. bovis

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Differential test positive and negative acetate utilization

(+) E. coli
(-) Shigella

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Differential test positive and negative indole (1)

Klebsiella

(+) K. oxytoca
(-) K. pneumoniae

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Differential test positive and negative indole (2) .
proteus

(+) P. vulgaris (OX 2, 19)
(-) P. mirabilis

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Differential test positive and negative for lysine decarboxylation

(+) Salmonella (NLF)
(-) Citrobacter (LF)

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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