Question

Bird flu is caused by
A. Bacteria
B. Protozoan
C. Fungi
D. Virus

Answer 1

Hint: Bird Flu is a contagious disease that affects humans and other animals in addition to birds. H5N1 infection is commonly responsible for bird flu. This type of disease does not have medicines usually.

Complete answer: Bird Flu is also known as avian influenza. It is caused by a virus. It is caused by strains of the influenza virus which commonly infect birds. The symptoms of bird flu include fever, sore throat, cough, nausea. All these symptoms may lead to severe breathing problems, pneumonia, acute respiratory distress syndrome (ARDS). Bird flu is a contagious disease as it spreads easily among birds but uncommon in transmission in humans. In late 1990, bird-flu caused the death of hundreds of millions of birds, including poultry birds. Antiviral medication is advised against bird flu. Preventive measures like vaccination of healthy birds, the limited spread of strains of highly pathogenic bird flu strains, etc. are also advised. There is no commercially available vaccine for humans against bird flu. The disease caused by bacteria is known as a bacterial disease, e.g. typhoid. The disease caused by protozoa is called a protozoan disease. E.g. malaria. While the disease caused by fungi is known as fungal disease. E.g. various skin infections.
Hence, the correct answer is option D.

Note: In 1997, the first case of bird flu was observed in humans. It killed nearly 60% of the infected people. The year 2005 is dubbed as ‘the year of bird flu’. There has been no single H5N1 case detected since February 2017.