Question
Biology Question on viruses and subviral particles
Rabies is caused by
A
virus
B
bacteria
C
Protozoa
D
All of these
Answer
virus
Explanation
Solution
Rabies (hydrophobia) is a 100% fatal disease. It is caused by a rabies virus. The virus enters the human body with saliva of an infected (rabid) animal, generally by the bite of a dog but also of cat. Fear of water is the main symptom, hence, hydrophobia. Incubation period is commonly 1−3 months, but may vary from 10 days to one year. Treatment of rabies was discovered by Louis Pasteur. It involves a series of 14 injections given after the bite of a dog. Bacteria cause diseases like typhoid, diphtheria, tetanus, cholera, TB, etc. Protozoans cause diseases, like kala azar, malaria, sleeping sickness, amoebiasis etc.