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Individuals suffering from primary atypical pneumonia have agglutinins to

  • A.Streptococcus MG
  • B.S avium
  • C.S mutans
  • D.Enterococcus faecalis

Answer: A

Correct answer: Streptococcus MG

Patients with primary atypical pneumonia, caused by Mycoplasma pneumoniae, develop agglutinins to Streptococcus MG as well as cold agglutinins to human group O red cells. The reaction is a heterophile cross-reaction and not evidence of streptococcal infection; it was used as a serological aid before specific mycoplasma tests were available.

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