Volume 29, Number 7—July 2023
Research
Long-Term Epidemiology and Evolution of Swine Influenza Viruses, Vietnam
Jonathan Cheung, Anh Ngoc Bui, Sonia Younas, Kimberly M. Edwards, Huy Quang Nguyen, Ngoc Thi Pham, Vuong Nghia Bui, Malik Peiris1
, and Vijaykrishna Dhanasekaran1
, and Vijaykrishna Dhanasekaran1
Table 1
Summary of swine influenza virus isolates, by province, from samples collected at Van Phuc slaughterhouse in Vietnam during 2010–2019*
| Province of origin | No. samples | No. (%) positive |
|---|---|---|
| Ha Noi | 2,178 | 52 (2.39)† |
| Ha Nam | 855 | 10 (1.17) |
| Hai Phong | 61 | 7 (11.48) |
| Bac Ninh | 51 | 4 (7.84) |
| Thai Nguyen | 199 | 3 (1.51) |
| Ninh Binh | 22 | 1 (4.55) |
| Nghe An | 51 | 1 (1.96) |
| Hung Yen | 96 | 1 (1.04) |
| Vinh Phuc | 215 | 1 (0.47) |
| Hoa Binh | 465 | 2 (0.43) |
| Phu Tho | 301 | 1 (0.33) |
| Bac Giang | 200 | 0 |
| Yen Bai | 150 | 0 |
| Thanh Hoa | 45 | 0 |
| Thua Thien Hue | 31 | 0 |
| Nam Dinh | 29 | 0 |
| Dien Bien | 2 | 0 |
| Thai Binh | 135 | 0 |
| Tuyen Quang | 27 | 0 |
| Dong Nai, SV | 195 | 11 (5.64) |
| Binh Duong, SV | 16 | 0 |
| Binh Dinh, SV | 10 | 0 |
| Kieu Ninh, SV | 7 | 0 |
| Location not specified |
509 |
20 (3.93) |
| Total | 5,850 | 114 (1.95)† |
*SV, southern Vietnam. †Includes 1 mixed infection of H1N2 and H3N2.
1These senior authors contributed equally to this article.
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