Where does Influenza Type A virus originate from? Why do you think northern and western states are affected predominantly?
Read the passage given below.
Hint : Bird flu has.................human infections.
(a) Crows
(b) Water birds in the wild
(c) Poultry and turkey
(d) Pigs
Answer. (b) Water birds in the wild
2. Why do you think northern and western states are affected predominantly?
(a) These states have large bird populations.
(b) These states are blessed with wild habitats.
(c) These states are either attractive destinations or lie in the winter migration routes.
(d) They have large forests besides habitable areas.
Answer. (c) These states are either attractive destinations or lie in the winter migration routes.
3. Influenza Type A virus infection in ducks, geese and crows is an instance of .......... transmission.
Answer. Bird to bird
4. A virus modifying its exterior for more effective transmission and non-detection is called
(a) asymptomatic infection
(b) mutation
(c) pneumonia
(d) aerosol
Answer. (b) mutation
5. Which one of the following is not among affected creatures?
(a) humans
(b)whales
(c) snake
(d) horses
Answer. (c) snake
6. Various virus strains are denoted by H and N (surface proteins) combinations. One of the following does not infect humans.
(a) H1N1
(b) H5N1
(c) H4N6
(d) H7N7
Answer. (c) H4N6
7. Bird flu viruses affect birds in their throats. (True/False)
Answer. False
8. What body parts of humans and animals are affected by bird flue viruses?
Answer. The respiratory system of humans and animals is affected by bird flue viruses.
9. How many strains of the virus affect humans and pigs?
Answer. Three strains of the virus affect humans and pigs.
10. What is avian influenza or bird flu?
Answer. Avian influenza or bird flu refers to the disease caused by influenza type A viruses. These viruses generally spread among poultry birds such as chickens and turkeys.
11. How is the outbreak of bird flu prevented?
Answer. The only measure to prevent the outbreak of the bird flu is killing the infected birds.
12. Find the word in para 4 which is opposite in meaning to ‘having symptoms’.
Answer. Asymptomatic
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