Neisseria species and Moraxella catarrhalis Flashcards
- Cytochrome oxidase test
Positive result
Colonies develop purple color within 10 seconds
- Cytochrome oxidase test
Negative result
No color change
- Cytochrome oxidase test
Positive control
Neisseria species, Pseudomonas aeruginosa
- Cytochrome oxidase test
Negative control
Escherichia coli
- Carbohydrate utilization test
Positive result
Yellow color in the upper part or throughout the medium
- Carbohydrate utilization test
Negative result
Red to orange color
Small, grayish-white, convex, translucent, glistening colonies with either smooth or irregular margins; maybe upto5different colony types
N. gonorrhoeae
Medium, blue-gray, smooth,
glistening, encapsulated
strains are mucoid
N. meningitis
Small, nonpigmented or
yellowish, smooth,
transparent
N. lactamica
Grayish-white, slightly
granular
N. cinerea
Medium, yellow, opaque,
smooth
N. flavescens
Large, nonpigmented,
wrinkled, coarse, dry,
adherent, cannot be
emulsified readily
N. sicca
Medium, greenish-yellow to
yellow, smooth, enTre edge,
Adherent
N. subflava
SomeTmes yellowish,
Mucoid appearance
N. mucosa
Small, grayish-white to light
yellow, translucent, raised
N. polysaccharea
Gray-white, slight yellow
Tnge, flat, glistening, dry
claylike consistency
N. elongata
Large, nonpigmented or gray, opaque, smooth; friable “honey puck” consistency; colony may be removed intact over surface of agar
M. catarrhalis
N. gonorrhoeae
+
MTM
Glucose
N. meningitis
+
MTM
Glucose
Maltose
N. lactamica
+
MTM
Glucose
Maltose
Lactose
N. cinerea
V
MTM
N. flavescens
+
Polysaccharide from Sucrose
N. sicca
+
Glucose Maltose Sucrose Frucrose Polysaccharide from Sucrose
N. subflava
+
V
Glucose
Maltose
Sucrose
Frucrose
