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Microbiology

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Rickettsia and Chlamydia

Question
31 out of 42
 

Which is true about C. pneumoniae- (AIPG 2011)



A 15 serovars have been identified

B Mode of transmission is by airborne bird excreta

C Cytoplasmic inclusions present in sputum are rich in glycogen

D Group specific antigen is responsible for complement fixing antibodies

Ans. D Group specific antigen is responsible for complement fixing antibodies

a. There is only one serovar of C.pneumoniae.

b. It is a strict human pathogen. Person to person transmission via respiratory secretions.

c. It causes atypical pneumonia, pharyngitis and sinusitis.

d. It has also been associated with atherosclerosis and worsening of asthama.

e. It produces pear shaped IB’s which do not contain glycogen.

f. Cytoplasmic inclusions of C.trachomatis contain glycogen and hence can be stained with iodine.

g. All Chlamydia species contain group specific antigens responsible for complement fixing antibodies.

h. Inhalation of infected airborne bird excreta can transmit C.psittaci.

Rickettsia and Chlamydia Flashcard List

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