Molecular epidemiology of influenza A H1N1 pandemic 2009 virus in humans and swine in Sri Lanka.

Perera HKK, Vijaykrishna D, Jayamaha J, Wickramasinghe G, Cheung CL, Premarathna AG, Yeung MF, Poon LLM, Perera AKC, Barr IG, Guan Y, Peiris JSM. 2014. Emerg Infect Dis 20: 2080-2084.


After multiple discrete introductions of influenza A(H1N1)pdm09 virus into Sri Lanka, the virus was transmitted among humans, then swine. The spread of virus between geographically distant swine farms is consistent with virus dispersal associated with a vehicle used for swine transportation, although this remains unproven.