Question

Which of the following is the causative organism of influenza?
A.Rhinovirus
B.Myxovirus influenza
C.Streptococcus
D.Salmonella

Answer 1

Hint: Influenza is known as the common flu. It is an illness that is caused by an RNA virus from the Orthomyxoviridae family.

Complete step by step answer:
-The causative agent of influenza is Myxovirus influenzae virus.
-The common symptoms of influenza include high fever, runny nose, headaches, muscle pains, coughing, sneezing, sore throat and tiredness.
-Myxovirus influenzae is divided into 2 groups – orthomyxoviruses and paramyxoviruses.
The orthomyxoviruses again subdivided into types A, B and C.
-Influenza B and C are human pathogens of influenza.
-All influenza A viruses are related to each other irrespective of their chemical, biological and genetical origin. Influenza A includes a large number of pathogens like pigs, horses, birds and man.

So, the correct answer is option B. Myxovirus influenzae.

Note:
-The rhinovirus is the most common viral infectious agent in humans. It mainly causes the common cold that is seen in case of humans. The infection increases the body temperature as well as the temperature of the nose.
-Streptococcus is a gram-positive spherical bacterium (coccus bacteria). It belongs to the family Streptococcaceae.
-Salmonella is an infectious bacterium that causes salmonellosis. This bacterial disease affects the intestinal tract of animals. The Salmonella bacteria live in the intestines of animals and humans and shed through feces. Humans are infected by this bacterium through contaminated water or food. The common symptoms include diarrhea.