You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is A male patient with symptoms of urethritis. Examination reveals only pus cells without any organism. Most likely cause is: and explain in detail?
Ans. is 'a' i.e., Chlamydia trachomatisRef: Harrison, 19th/e, p. 1165 and Ananthanarayan, 9th/e, p. 415Gram staining of samples shows presence of abundant pus cells but no bacteria (Intracellular bacteria) and Chlamydia cannot be grown on laboratory media like blood agar, chocolate agar, MacConkey agar etc.