Q.87
Chlamydia organisms are stained blue with a reddish background with
- Staining of Chlamydia Species:
- In the Castaneda staining method (utilizing buffered methylene blue followed by safranin counterstain), the small, obligate intracellular elementary bodies of Chlamydia and Rickettsia stain intensely blue, contrasting against a reddish/pink cellular background.
- Comparison with Other Specialized Stains:
- Macchiavello's Stain: Elementary bodies stain bright red against a blue/green cytoplasmic background.
- Modified Ziehl-Neelsen (Stamp's) Stain: Elementary bodies stain red against a green (malachite green) or blue background.
- Gram Stain: Gram staining is ineffective for routine clinical detection of Chlamydia due to their minute size ($0.3\ \mu\text{m}$) and unique cell envelope lacking peptidoglycan.
Correct option: (3) Castaneda method of staining
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 →