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The prevalence of co-infection of DNA viruses in PCV2-positive samples (n = 78) in Vietnamese pig herds in 2016.
| Co-infection combination | Number of viruses | Number of positives (%) in 2016 |
|---|---|---|
| Negative | 0 | 7 (9.0) |
| PPV2 | 1 | 18 (23.1) |
| TTV2 | 1 | 5 (6.4) |
| PPV3-TTV2 | 2 | 2 (2.6) |
| PPV2-PPV3-PPV4 | 3 | 9 (11.5) |
| PPV2-PPV3-TTV2 | 3 | 21 (26.9) |
| PPV3-PPV4-TTV2 | 3 | 1 (1.3) |
| PPV2-PPV3-PPV4-TTV2 | 4 | 15 (19.2) |
PPV=Porcine parvovirus (e.g., PPV2, PPV3, and PPV4), TTV=Torque teno virus (TTV2)
