Treponema Pallidum
Positive VDRL confirms syphilis (Treponema pallidum, a spirochete); tissue damage in the primary chancre results from spirochete invasion combined with host immune response.
What our notes say
- Positive VDRL confirms syphilis (Treponema pallidum, a spirochete); tissue damage in the primary chancre results from spirochete invasion combined with host immune response. (Male Reproductive & Urinary Tract Pathology MCQs | MKU Year 3 Medicine)
- Secondary syphilis occurs 4-10 weeks after primary chancre and results from hematogenous and lymphatic dissemination of Treponema pallidum. (Medical Bacteriology And Parasitology End Year 2024/2025)
- *Answer: A* (Note: The classic description fits syphilitic chancre caused by Treponema pallidum, but this was not listed as an option) (Mbmm3311 – Medical Bacteriology)
- *Explanation:* The description of a painless ulcer with raised border is classic for a primary syphilitic chancre caused by Treponema pallidum. (Mbmm3311 – Medical Bacteriology)
- Treponemal chancre (syphilis, Treponema pallidum): typically single, painless, indurated (firm) ulcer with a clean base (Bacteriology and Entomology Supplementary Exam)
- TREPONEMA PALLIDUM (Syphilis) vs HAEMOPHILUS DUCREYI (Chancroid) — comparison, repeated 5–10 marks (Streptococcus Classification, S. pyogenes, Rheumatic Fever, AGN)
Study material on Treponema Pallidum
- Mbmm3311 – Medical Bacteriology
- Female system
- Male Reproductive & Urinary Tract Pathology MCQs | MKU Year 3 Medicine
Practice questions on Treponema Pallidum
.6 What color light is emitted when antigens are exposed to UV light after being treated with fluorescein isothiocyte (FITC), such as in the test for Treponema pallidum (syphilis) or to dye the Chicago river for a particular holiday (fluorescein)? ---
- Blue
- Purple
- Red
- Orange
- Green
Answer: E.