Question

give an account of various types of infectious agents.​

Answer 1

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Important infectious agents are - viruses, bacteria, protozoans, fungi and forms.

• VIRUSES :- Viruses are obligate parasites, i.e., they live only inside a living host. Viruses have no cell like structure, so they cannot multiply by themselves. So they must capture a living host to show its multiplication.
• BACTERIA :-These are prokaryotic organisms . All bacteria are not disease causing. Many of them are beneficial for us. But some bacteria causes serious diseases, like tuberculosis and leprosy etc. Bacteria also multiply rapidly.
• PROTOZOANS :- These are unicellular organisms. Only a few protozoans are pathogenic to man. Some of these are Plasmodium (causing malaria), Entamoeba hystolytica (causing amoebic dysentery).
• WORMS :- These are small animals belonging to helminth group. Their reproductive rate is comparatively low. Important worms are - Ascaris, Taenia solium, hook worm etc.

Answer 2

Answer:

Important infectious agents are - viruses, bacteria, protozoans, fungi and forms.

VIRUSES :- Viruses are obligate parasites, i.e., they live only inside a living host. Viruses have no cell like structure, so they cannot multiply by themselves. So they must capture a living host to show its multiplication.

• BACTERIA :-These are prokaryotic organisms . All bacteria are not disease causing. Many of them are beneficial for us. But some bacteria causes serious diseases, like tuberculosis and leprosy etc. Bacteria also multiply rapidly.
• PROTOZOANS :- These are unicellular organisms. Only a few protozoans are pathogenic to man. Some of these are Plasmodium (causing malaria), Entamoeba hystolytica (causing amoebic dysentery).
• WORMS :- These are small animals belonging to helminth group. Their reproductive rate is comparatively low. Important worms are - Ascaris, Taenia solium, hook worm etc.