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Which one of the following options gives the correct matching of a disease with its causative organism and mode of infection?
A
Elephantiasis – $Wuchereria\ bancrofti$ – With infected water and food
B
Malaria – $Plasmodium\ vivax$ – Bite of male $Anopheles$ mosquito
C
Typhoid – $Salmonella\ typhi$ – With inspired air
D
Pneumonia – $Streptococcus\ pneumoniae$ – Droplet infection
Detailed Solution
Pneumonia is caused by $Streptococcus\ pneumoniae$ (and $Haemophilus\ influenzae$); a healthy person gets it by inhaling the droplets or aerosols released by an infected person. This row is fully correct.
Elephantiasis (filariasis) is caused by $Wuchereria\ bancrofti$, but it is transmitted by the bite of the female $Culex$ mosquito, not by water and food.
Malaria is caused by $Plasmodium$, but it is transmitted by the bite of the female $Anopheles$ mosquito, not the male.
Typhoid is caused by $Salmonella\ typhi$, but it spreads through contaminated food and water, not inspired air.
Hence the correct match is pneumonia – $Streptococcus\ pneumoniae$ – droplet infection.
Elephantiasis (filariasis) is caused by $Wuchereria\ bancrofti$, but it is transmitted by the bite of the female $Culex$ mosquito, not by water and food.
Malaria is caused by $Plasmodium$, but it is transmitted by the bite of the female $Anopheles$ mosquito, not the male.
Typhoid is caused by $Salmonella\ typhi$, but it spreads through contaminated food and water, not inspired air.
Hence the correct match is pneumonia – $Streptococcus\ pneumoniae$ – droplet infection.