Q.107
Which of the following statements are true for Chlamydiosis?
(A). Blood agar is used to isolate Chlamydia psittaci
(B). Chlamydia psittaci has stages of "Reticulate bodies" and "Elementary bodies" in the life cycle.
(C). Psittacine birds are reservoirs of Chlamydia psittaci.
(D). In humans, Chlamydia psittaci infection may cause hepatitis and endocarditis.
Choose the correct answer from the options given below:
EXPLANATION
Bacterial Zoonoses (Zoonotic Tuberculosis, Brucellosis, Anthrax, Leptospirosis, Q Fever)
- Biology of Chlamydia psittaci (Avian Chlamydiosis / Psittacosis):
- Obligate Intracellular Nature: C. psittaci is an obligate intracellular bacterium requiring host cell ATP for replication. It cannot grow on cell-free artificial media such as blood agar, but requires embryonated chicken eggs or tissue cell culture [Statement A is FALSE].
- Developmental Cycle: Alternates between small, metabolically inactive, infectious Elementary Bodies (EBs) that survive extracellularly and larger, non-infectious, metabolically active, replicating Reticulate Bodies (RBs) within host phagosomes [Statement B is TRUE].
- Reservoir: Psittacine birds (parrots, parakeets, cockatoos) as well as pigeons and turkeys are primary reservoirs [Statement C is TRUE].
- Human Complications: Inhalation of desiccated avian droppings causes psittacosis, which may complicate into hepatitis, culture-negative endocarditis, and severe atypical pneumonia [Statement D is TRUE].
Correct option: (2) (B), (C) and (D) only.
Explanation not matching this question?
क्या व्याख्या इस प्रश्न से मेल नहीं खा रही?
Report
Want to practice this paper in exam conditions?
क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं?
Test yourself in 5-question batch format with timer and hidden answers.
5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode →
प्रैक्टिस टेस्ट मोड शुरू करें →