Match List-I with List-II:
| List-I (Disease) | List-II (Feature) |
| A. Typhoid | I. Eggs of the parasite passed out with faeces contaminate soil, water and plants |
| B. Amoebiasis | II. Confirmed by Widal test |
| C. Ascariasis | III. Infection through contaminated objects such as pens, cups and doorknobs |
| D. Common cold | IV. Houseflies act as mechanical carriers of the parasite |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → A-II, B-IV, C-I, D-III
(A) Typhoid — this matches (II) Confirmed by Widal test. Typhoid fever is caused by Salmonella typhi, and the disease is confirmed by the Widal test.
(B) Amoebiasis — this matches (IV) Houseflies act as mechanical carriers of the parasite. Houseflies carry Entamoeba histolytica from the faeces of an infected person to food and food products.
(C) Ascariasis — this matches (I) Eggs of the parasite passed out with faeces contaminate soil, water and plants. A healthy person gets Ascaris through contaminated water, vegetables and fruits.
(D) Common cold — this matches (III) Infection through contaminated objects such as pens, cups and doorknobs. Droplets from the cough or sneeze of an infected person reach such objects, and the rhinoviruses then pass to a healthy person.
NCERT Extract:
Common Diseases in Humans – “… Intestinal perforation and death may occur in severe cases. Typhoid fever could be confirmed by Widal test : A classic case in medicine, that of Mary Mallon nicknamed Typhoid Mary, is worth mentioning here.”
Common Diseases in Humans – “… Droplets resulting from cough or sneezes of an infected person are either inhaled directly or transmitted through contaminated objects such as pens, books, cups, doorknobs, computer keyboard or mouse, etc., and cause infection in a healthy person.”
Common Diseases in Humans – “… Houseflies act as mechanical carriers and serve to transmit the parasite from faeces of infected person to food and food products, thereby contaminating them.”
Common Diseases in Humans – “… The eggs of the parasite are excreted along with the faeces of infected persons which contaminate soil, water, plants, etc. A healthy person acquires this infection through contaminated water, vegetables, fruits, etc.”