A patient (pigeon handler) presents with interstitial pneumonitis accompanied by headache, backache, and a dry, hacking cough. A pale, macular rash is also found on the trunk (Horder's spots). Likely organism is:: (A) Histoplasma, (B) Chlamydiae, (C) Mycoplasma, (D) Aspergillus
Answer is B. Chlamydiae