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JAMB Biology 1999 Question 35

Question 35

Microorganisms and Health

The construction of dams may lead to an increase in the prevalence of

  1. A.typhoid fever, measles and yellow fever
  2. B.tuberculosis, leprosy and trypanosomiasis
  3. C.guineaworm, malaria and tuberculosis
  4. D.malaria, bilharziasis and onchocerciasis.
Show the answer and explanation

Answer: D (malaria, bilharziasis and onchocerciasis.)

Explanation

Dams create still and fast-flowing water where mosquitoes, snails and blackflies breed, spreading malaria, bilharzia and river blindness.