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Microbiology

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Gram Negative Coccobacilli

Question
39 out of 58
 

A 33-year-old woman is diagnosed with "walking pneumonia" caused by MycoplasmA. Which of the following best describes the characteristics of the etiologic organism? (AIIMS Nov 2011)



A Absence of a cell wall

B Belonging to the class of Eukaryotes

C Often evoke an IgM autoantibody response leading to human erythrocyte agglutination

D Typically colonize the gastrointestinal tract

Ans. A Absence of a cell wall

Illness is often less severe than in other community-acquired pneumonias: “walking pneumonia.”

a. Mycoplasma are the smallest living organisms, and they do not have cell walls but rather have cell membranes. Thus, they are typically resistant to antibiotics that interfere with cell wall synthesis.

b. Also, because of their absence of a cell wall, they are not usually detected on Gram stain. They have a propensity for attaching to respiratory, urethral, or genital tract epithelium.

Gram Negative Coccobacilli Flashcard List

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