Q18 of 44 Page 32

Name the causative organisms responsible for ring worm in humans? Mention the symptoms of the infection.

Ringworm is caused by three different genera of fungi namely, Epidermophyton, Microsporum and Trichophyton.

Symptoms of ringworms:


Fungi can live on the dead cells of epidermis. They cause superficial infections in skin, hair, nail, etc. form patches and cause itching.


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16

i) Give any three examples for the most infectious diseases in man and their causative agents.

ii) To discover medicine for viral infected diseases like AIDS is more difficult than other diseases. Is the statement true or false? Discuss.


 17

A student had an attack of measles and recovered from the infection. His science teacher said that he will not get that disease again in his life time. Is it true? Why?

 19

Pick out the odd ones:

i) AIDS: Retro virus, lymphocytes, BCG, ELISA


ii) Bacterial disease: Rabies, cholera, common cold, influenza


iii) DPT vaccine: Diphtheria, tuberculosis, pertusis, tetanus


iv) Infective stage of Plasmodium in humans: Sporozoites, merozoites, trophozoites, gametocytes.


v) Mental dimension: brightness of skin, normal metabolism, no black rings around eyes, knows his capacity.


 20

In the manufacturing of anti-venom injection against snake bite, antibodies produced in the horse are being used. Mention the type of immunity involved.