bacterial biochemical test Flashcards
oxidase positive
Pseudomonas spp
Burkhulderia
Moraxella
Aeromonas spp.
Vibrio spp
Campylobacter
Helicobacter
Actinobacillus
Capnocytophaga
HACIK (H variable)
Pasteurella spp.
Bordetella pertussis .
Oxidase Negative
Enterobacteriales
Staphylococci
Streptococci
Enterococci
Neisseria
Yersenia
Salmonella
Shigella
Stenotrophomonas
Acinetobacter
Catalase Negative
Streptococci
Enterococci
Lactobacillus
Clostridium
Staph anaerobicus
What are the strept milliri group?
Milliri group have very small colony but large zone of haemolysis:
CIA :Constalatius , Intermedius , Angenosus
Beta Haemolytic bacteria
SUAR- narrow
Corynebacteria
Listeria
Group A,B,C,G strepts
Enterococuui
Clostridium : perfrengens , tetani , Novyi
grows in air, may require CO2, star shaped non-haemolytic colonies with rough surface, may produce pitting of agar
– Catalase positive, Oxidase positive and Urease negative
Aggregatibacter actinomycetemcomitans
HACIK Organism :
requires 5% to 10% CO2, small moist colonies with clear centres surrounded by flat growth, non-haemolytic
– Catalase negative, oxidase positive and urease negative
Eikenella corrodens
HACIK Organism : CO2 not required, either spreading corroding colony or smooth convex colony, often produces mucoid colonies with a small zone of β-haemolysis – Catalase negative, oxidase positive and urease negative
Kingella Kingae species:
may require CO2 addition, smooth, convex and opaque colonies, slight a-haemolysis
– Catalase negative, oxidase positive and urease negative
Cardiobacterium
grows in air + CO2, yellowish non-haemolytic colonies 1.5mm at 24hr – Catalase negative, oxidase negative and urease negative
Aggregatibacter aphrophilus
-Gram-positive rod - long, branching and sometimes beaded. -Slow-growing
-dry chalky colonies which are cream, pale orange or pink.
-It is weakly AAF by Kinyoun’s stain
-Also positive by Gomori methenamine silver staining.
-Co-trimoxazole is the first line treatment
N. asteroides and N. brasiliensis.
T/F: Capnocytophaga Canimorus is Oxidase positive
T
T/F:
Stenotrophomonas is Oxidase Negative
T
T/F:
Candida albicans is urase negative and Cryptococcus neoformans rapid positive
T
Gram-negative rod, non-lactose fermenter, DNAse positive; some strains produce a bright red pigment .
-intrinsic colistin resistance , and many are AMPc producers
-carbapenems, ciprofloxacin and aminoglycosides are likely treatment options
Serracia marcescens
