Health Dictionary
Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.
Swine influenza classification
Introduction
Overview
Overview
Swine influenza may be classified according to the genera of the infective agent into either influenza A (common) or influenza C (rare). Influenza B has not been associated with development of swine influenza.
Classification
Classification
Swine influenza may be classified according to the genera of the infective agent into either influenza A (common) or influenza C (rare). Influenza B has not been associated with development of swine influenza.
Influenza A
- Influenza A subtypes include the following:
- H1N1
- H1N2
- H2N3
- H3N1
- H3N2
A new strain of H1N1, A/Veracruz/2009, emerged in 2009 and was responsible for the 2009 swine influenza outbreak in humans.
Influenza C
- Influenza C has been described in a few case reports in the USA and Japan.
- Influenza C is not thought to be genetically diverse, and accordingly it has not been associated with outbreaks among humans.
References
References
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]