Answer:
Disease
Mode of transmission
(a) Amoebiasis
Direct and oral. The tetranucleate cysts are ingested with contaminated food and water.
(b) Malaria
Indirect and inoculative. The sporozoites are introduced along with the saliva of vector female Anopheles mosquitoes.
(c) Ascariasis
Direct and oral. Capsules with second juveniles are ingested with contaminated food and water.
(d) Pneumonia
Air borne or through droplet infection or aerosols or contaminated utensils. Bacterial cysts are spread by sputum of the patients.
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