No influenza D virus detected among pigs, northern Vietnam

Coronaviruses Among Swine Workers in Northern Vietnam

“…From June 2019 to May 2020, as part of an influenza A virus surveillance study, we collected nasal washes from 401 swine workers on five swine farms in northern Vietnam as previously described [ 4 , 5 ]. Briefly, study team members performed monthly sampling visits to each farm and, after consent, collected nasal washes from swine workers by injecting 5 mL of sterile water into one nostril and collecting the expressed fluid.…”

“…Although we did not test swine samples in this study, it is possible that SCoV prevalence among the swine herds on these farms is low. Interestingly, we had low detections of other respiratory diseases including Influenza A virus [ 5 ] and Influenza D virus [ 4 ] among these swine herds and their workers previously despite seeing a high prevalence of influenza A viruses among poultry in the same areas [ 5 ]. This suggests that there may be a low prevalence of influenza and CoVs among the swine workers, and possibly their swine, potentially due to increased biosecurity protocols among these farms [ 4 ].…”

“…Interestingly, we had low detections of other respiratory diseases including Influenza A virus [ 5 ] and Influenza D virus [ 4 ] among these swine herds and their workers previously despite seeing a high prevalence of influenza A viruses among poultry in the same areas [ 5 ]. This suggests that there may be a low prevalence of influenza and CoVs among the swine workers, and possibly their swine, potentially due to increased biosecurity protocols among these farms [ 4 ]. Regardless, future studies should be conducting with a larger cohort of livestock workers and their animals to further understand the threat of novel CoVs spilling over into humans.…”

Influenza D virus was not detected among prospectively studied swine farm in multiple provinces of China

“…No IDV was detected in this study which is agreement with a previous study of Vietnamese swine farms. 24 A number of molecular and serological studies have demonstrated high IDV prevalence among swine workers. 7,25,26 As other groups have documented IDV among Chinese pigs, perhaps IDV is not homogeneously prevalent among swine farms in China.…”