Table 3.
Percentages (%) of institutions reporting viral and parasitic outbreaks from the 3 most recent surveys of adventitial outbreaks in biomedical research facilities
| Agent | 1998 survey21 | 2008 survey10 | Current study |
| Mouse parvovirus | 27% SPF; 40% nonSPF | 94% | 37% |
| Epizootic diarrhea of infant mice | 6% SPF; 28% non SPF | 30% | 14% |
| Mouse hepatitis virus | 12% SPF; 75% nonSPF | 40% | 10% |
| Minute virus of mice | not evaluated | 38% | 5% |
| Theiler murine encephalomyelitis virus | 4% SPF; 35% nonSPF | 10% | 1% |
| Pinworms | 32% SPF; 68% nonSPF | 92% | 43% |
| Fur mites | 17% SPF; 38% nonSPF | 55% | 56% |