Question

A biological agent of the disease is
A) Vitamin deficiency
B) Virus
C) Does
D) Carbohydrate deficiency

Answer 1

A biological agent is one that exists in the natural environment- soil, water, air, plants, and animals. Biological agents are biohazards. Not all biological agents have the potential to cause disease in humans. Some are pretty harmless. A biological agent may be a microorganism, an endoparasite, or maybe a cell culture.

Complete answer:
● There are three categories of biological agents – bacteria, viruses and fungi.
● They cause disease in man in a number of ways and can cause infection
● Attack the host through toxins that the biological agents produce and secrete.
● The host may be allergic to some substance that the agent produces, for example- enzyme.
● The biological agents can cause health hazards mainly because they can affect at a minimal dose.
● They survive in the worst of conditions – heat, cold, moisture, damp.
● They are able to tolerate even harsh environmental conditions and replicate very rapidly.
● The effect on humans ranges from mild allergies to even death.
● So, the correct answer is option B.
● Viruses are submicroscopic microorganisms that invade the host system and use it to multiply and thrive there. They can infect all life forms and have the ability to cause severe health hazards.
So, the right answer is option B.

Note: These biological agents may enter the body through a number of routes: inhalation, through wounds, absorbed through skin/ mucous membrane, animal bites, needle stick, etc. They are so deadly that they are being used to develop biological weapons. Bacillus anthrax, a bacteria, serves as the deadliest biological weapon ever. After entering the body, their mechanism of action is to interfere with the normal physiology of the body thus leading to disease.