The most important preventable cause of blindness in the world is:

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ATI PN Pediatrics Proctored Exam 2020 Questions

Question 1 of 5

The most important preventable cause of blindness in the world is:

Correct Answer: C

Rationale: Trachoma is the leading preventable cause of blindness globally, caused by Chlamydia trachomatis, treatable with antibiotics and preventable through hygiene (WHO data). Glaucoma is significant but less preventable on a global scale. Retinoblastoma and optic nerve glioma are rare cancers, not primary preventable causes. Eye injury is notable but less prevalent than trachoma.

Question 2 of 5

Most common organism responsible for acute hemorrhagic conjunctivitis is:

Correct Answer: A

Rationale: Enterovirus 70 is the primary cause of acute hemorrhagic conjunctivitis, known for outbreaks with hemorrhage (WHO). Other viruses (B-E) are less common.

Question 3 of 5

A 16-month-old boy refuses to eat properly. His mother stated that he was eating properly up to 12 months of age. She started a part time job 2 months ago. She is extremely concerned. The boy is very active. The next step in management is:

Correct Answer: D

Rationale: Reassurance suits an active 16-month-old with reduced appetite, possibly due to maternal stress or toddler phase (AAP). A-D are unnecessary without deficiency.

Question 4 of 5

All of the following conditions cause fetal bradycardia (heart rate less than 120 beats/minute) except:

Correct Answer: C

Rationale: Local anesthetics don’t typically cause fetal bradycardia; A-D are known causes (ACOG).

Question 5 of 5

The maternal occupational limit of exposure to radiation for the entire 40 weeks of pregnancy is:

Correct Answer: D

Rationale: 500 mrad is the occupational limit for pregnancy, per NRC. A-C are too low, E is excessive.

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