Influenza pandemic is mainly caused by –
Correct Answer: Type A
Description: ↵
Influenza
Influenza is an acute respiratory tract infection caused by influenza virus.
There are three viral subtypes
Type A → Causes all Pandemics and most of the epidemics
Type B → Can cause epidemics
Type C → Causes endemic infection
Three types of influenza viruses are circulating in world → A (H1N1), A (H3 N2) and B
A New type has been recognized → A (H5 N1)
Source of infection → case or subclinical case
Mode of transmission → Droplet infection by respiratory route
Incubation period →18-72 hours
Clinical manifestations
Most infections are subclinical
fever, headache and myalgia
Respiratory → coughing
There is no virernia
Complications
Pneumonia → M.C. by str. pneumoniae
Worsening of COPD
Encephalitis
Reye's Syndrome → with type B virus
GB. Syndrome
G I Symptoms (gastric flu) → type B virus
Laboratory diagnosis
Most commonly, the diagnosis is established by the use of rapid viral tests that detect viral nucleoprotein or neuraminidase - Harrison - 1069
Best specimen is nasopharyngeal secretion.
Category:
Social & Preventive Medicine
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now