Question

Smallpox and rabies are caused by
A. Viruses
B. Protozoans
C. Bacteria
D. Nematodes

Answer 1

Hint: The microorganisms can be dangerous to the animals and the humans. The viruses are the most harmful microorganisms. Smallpox infection is the contagious infection. It affects the skin of the humans and large fluid filled rashes formed on the skin. Rabies spread by the bite of an infected dog or cat.

Complete answer:
Smallpox is an infection which is contagious and deadly disease. It affects humans for thousands of years. It is caused by one of the two virus variants on the skin, variola major and variola minor. These viruses belong to the family of Poxviridae, subfamily Chordopoxvirinae and genus Orthopoxvirus. Variola virus infects only humans in nature. The vaccinia, cowpox, and monkeypox viruses infect both humans and other animals. It is transmitted by inhaling the airborne Variola virus. The sores in mouth and skin rash occur due to this infection. The fluid- filled bumps appear on skin.
Rabies virus causes the rabies infection. It is caused by lyssaviruses. The infection spread through the saliva of the infected animals. The infected animal bites the animal or person and spreads the infection in it. The virus in saliva gets into an open wound or the mucous membranes, such as mouth or eyes. From the above information we have found that smallpox and rabies are caused by the viruses.

Hence, the correct answer is option (A).

Note: Smallpox can be treated naturally by taking sugar free popsicles and bathe in oatmeal, taking soda baths, applying calamine lotion. These treatments give relief in itching. The antiviral drugs are effective in the treatment of the small pox. Humans are vaccinated with replication competent smallpox vaccines. The rabies can be prevented by vaccinating dogs and cats against rabies. Keep dogs and cats under control, do not keep wild animals alone and do not keep wild animals as pets.