Question:easy
Chlamydia trachomatis serovars D-K cause:
Chlamydia trachomatis serovars D-K cause:
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A-C causes trachoma, D-K causes genital infections such as urethritis, L1-L3 causes LGV.
Updated On: Jul 8, 2026
- Arteriosclerosis
- Trachoma
- Lymphogranuloma venereum
- Urethritis
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Split Chlamydia trachomatis into its three serovar families.
This one species is split into three groups by serovar, and each group sticks to its own tissue. A to C prefers the eye, D to K prefers the genital tract, and L1 to L3 prefers lymph nodes.
Step 2: Anchor the eye group first.
A, B, Ba and C are the trachoma serovars, causing a slow scarring eye infection common where hygiene is poor. This rules out trachoma for our D-K group.
Step 3: Anchor the lymph node group.
L1, L2 and L3 cause lymphogranuloma venereum, a sexually spread disease that inflames and swells lymph nodes in the groin. This is a different serovar set from D-K, so it is also ruled out.
Step 4: Place D-K correctly.
That leaves D through K, which are the serovars adapted to the genital tract lining. They cause urethritis in men, cervicitis in women, and can also cause conjunctivitis or pneumonia in a newborn exposed during delivery.
Step 5: Dismiss arteriosclerosis.
Arteriosclerosis is a disease of blood vessel walls, and Chlamydia trachomatis has no established role in causing it.
Step 6: Conclude.
Since D-K is the genital serovar group, the disease they cause here is urethritis.
\[ \boxed{\text{Urethritis}} \]
This one species is split into three groups by serovar, and each group sticks to its own tissue. A to C prefers the eye, D to K prefers the genital tract, and L1 to L3 prefers lymph nodes.
Step 2: Anchor the eye group first.
A, B, Ba and C are the trachoma serovars, causing a slow scarring eye infection common where hygiene is poor. This rules out trachoma for our D-K group.
Step 3: Anchor the lymph node group.
L1, L2 and L3 cause lymphogranuloma venereum, a sexually spread disease that inflames and swells lymph nodes in the groin. This is a different serovar set from D-K, so it is also ruled out.
Step 4: Place D-K correctly.
That leaves D through K, which are the serovars adapted to the genital tract lining. They cause urethritis in men, cervicitis in women, and can also cause conjunctivitis or pneumonia in a newborn exposed during delivery.
Step 5: Dismiss arteriosclerosis.
Arteriosclerosis is a disease of blood vessel walls, and Chlamydia trachomatis has no established role in causing it.
Step 6: Conclude.
Since D-K is the genital serovar group, the disease they cause here is urethritis.
\[ \boxed{\text{Urethritis}} \]
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