Porcine Astrovirus 4 Detection in Lesions of Epitheliotropic Viral Infection in the Porcine Respiratory Tract

Table 2

Distribution and proportion of positive PoAstV4 cases in the US. For comparison, confirmed positive IAV cases with histopathological lesions in pigs <6 weeks old, from the same time frame as PoAstV4-positive cases.

States	PoAstV4 (+) cases	IAV diagnoses
Iowa	40 (47%)	922 (50%)
South Dakota	8 (9%)	38 (2%)
Illinois	8 (9%)	168 (9%)
North Carolina	8 (9%)	110 (6%)
Missouri	4 (5%)	94 (5%)
Indiana	4 (5%)	87 (5%)
Virginia	3 (4%)	35 (2%)
Nebraska	2 (2%)	53 (3%)
Ohio	2 (2%)	53 (3%)
Arkansas	1 (1%)	42 (2%)
Kentucky	1 (1%)	6 (<1%)
Minnesota	1 (1%)	100 (6%)
Oklahoma	1 (1%)	8 (<1%)
Tennessee	1 (1%)	1 (<1%)
Wisconsin	1 (1%)	28 (2%)
Pennsylvania	0 (0%)	43 (2%)
Arizona, California, Colorado, Kansas, Michigan, Utah	0 (0%)	44 (2%)
Total	85 cases (100%)	1832 cases (100%)