What is the size of Moraxella catarrhalis?

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Those of the subgenus Branhamella (e.g. Moraxella catarrhalis) are small (0.6–1.0 μm) cocci, whereas organisms of the subgenus Moraxella are larger (1.0–1.5 × 1.5–2.5 μm) plump rods (Holt et al., 2000).

What is the shape of Moraxella catarrhalis?

kidney-shaped
M. catarrhalis is a large, kidney-shaped, Gram-negative diplococcus. It can be cultured on blood and chocolate agar plates after an aerobic incubation at 37 °C for 24 hours.

Is Moraxella catarrhalis gram-negative?

M. catarrhalis is unique among gram-negative diplococci; strains of M. catarrhalis produce no reaction in enzyme substrate tests.

Can Moraxella catarrhalis grow MTM?

With Moraxella catarrhalis, the solution stays red. Finally, it grows well on blood and chocolate agar and it doesn’t grow on modified Thayer-Martin agar, like other Gram-negative diplococci, such as Neisseria species.

What gram is Moraxella?

Moraxella (Branhamella) catarrhalis, formerly called Neisseria catarrhalis or Micrococcus catarrhalis, is a gram-negative, aerobic diplococcus frequently found as a commensal of the upper respiratory tract (124, 126; G.

Is Moraxella catarrhalis viral or bacterial?

Moraxella catarrhalis (M. catarrhalis) is a type of bacteria that’s also known as Neisseria catarrhalis and Branhamella catarrhalis. It used to be considered a normal part of the human respiratory system, but more recent research shows that can it sometimes causes infections. Many young children have M.

Is Moraxella a gram?

Moraxella organisms are gram-negative cocci in the family Neisseriaceae. They were previously known as diplococcus of Morax-Axenfeld. Moraxellae are normal inhabitants of the upper respiratory tract and are also found on the skin and in the urogenital tract.

Can Moraxella grow on MacConkey Agar?

They grow well on blood agar as well as chocolate agar but not on MacConkey agar.

Is Moraxella gram-positive or negative?

gram-negative
Moraxella (Branhamella) catarrhalis, formerly called Neisseria catarrhalis or Micrococcus catarrhalis, is a gram-negative, aerobic diplococcus frequently found as a commensal of the upper respiratory tract (124, 126; G.