Answer- A. Klebsiella granulomatis
“Klebsiella granulomatis Laboratory Diagnosis: This can be made by demonstruttion of Donovan bodies in Wright-Giemsa stained impression smears from the lesions. They appear as rounded coccobacilli, l -2 micron in size, within cystic spaces in large mononuclesr cells. They show bipolar condensation of chromatin, giving a closed safety-pin appearance in stained smears. Capsules are usually seen os dense acidophilic areas around the bacilli. They are non-motile and Gram negative.