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PED-Positive Submissions: New Cases Breaks Record Again

20 January 2014

US - The total number of swine accessions and diagnostic case submissions testing positive for the Porcine Epidemic Diarrhoea (PED) virus now stands at 2,271, writes Jackie Linden. The virus has now been found in 23 states as South Carolina has reported its first positive test result.

By farm class, this figure for the total number of positive laboratory swine accessions/diagnostic case submissions as follows between the weeks of 15 April and 5 January: suckling, 467 (+30); nursery, 447 (+47); grower/finisher, 671 (+38); sows/boars, 248 (+7) and 471 (+70) unknown. The total is up 188 from the previous week, representing another record in new cases reported in one week.

South Carolina has reported its first positive test results in the most recent week, bringing the total number of states affected to 23.

Those states with 20 or more positive tests are: Iowa, 852; North Carolina, 316; Oklahoma, 276; Minnesota, 263; Kansas, 152; Illinois, 81; Indiana, 69; Ohio, 66; Colorado, 38; Pennsylvania, 28 and Texas, 26.

For the most recent week, Iowa once again leads the 'league table' in the number of new positive results, accounting for 82 of the total of 188 new cases, followed by Minnesota with 46 and North Carolina with 15.

At 70, an unusually high number of the positive results in the most recent week (5 January) are of "unknown" origin in terms of production phase at this point. Of those results that are attributed to a phase of production, seven were in sows/boars, and a further 30, 47 and 38 cases in the "suckling", "nursery" and "grow-finish" categories, respectively.

In mid-June, the reporting system was adjusted. For the weeks prior to 16 June, laboratories were able to provide diagnostic case submissions as well as the number of premises testing positive for the PED virus (PEDv). Since 16 June, the data refer only to diagnostic cases submissions ('swine accessions').

From the week of 16 June to that of 5 January, the total number of biological (swine) samples testing positive is 7,175 - up 576 from the previous week and another record increase. The most-affected states by this measure are: North Carolina, 1,958; Iowa, 1,579; Oklahoma, 1,024; Kansas, 674; Minnesota, 652; Illinois, 435; Ohio, 217; Colorado, 119, Missouri, 106, Texas, 100; Indiana, 85 and Pennsylvania, 84. Other states, where positive, reported 50 positives or fewer.

In the most recent week reported (week of 5 January), the following states reported one or more positive results: Colorado (4), Iowa (187), Illinois (65), Kansas (28), Kentucky (8), Michigan (2), Minnesota (87), North Carolina (154), Nebraska (1), Ohio (13), Oklahoma (8), South Carolina (3), South Dakota (2), Texas (10) and Unknown (4).

The total number of environmental samples testing positive for PEDv has been reported weekly since the week of 16 June. The total has reached 1,508, which is 134 more than the previous week's figure. The totals for each state are as follows (with the increase in brackets: Colorado, 19 (=); Iowa, 216 (+34); Illinois, 60 (+20); Kansas, 193 (+14); Michigan 1 (=), Minnesota, 463 (+36); Missouri, 43 (+8); North Carolina, 105 (+14); Nebraska, 9 (+1); New York 1 (=); Ohio, 47 (=); Oklahoma 264 (+3); Pennsylvania, 9 (=); South Dakota, 4 (+2); Tennessee, 8 (=); Texas, 12 (+1); Virginia, 2 (=); unknown, 50 (=).

These data are collated by USDA APHIS VS NVSL National Animal Health Laboratory Network (NAHLN) and cited by the American Association of Swine Veterinarians (AASV) in a report dated 15 January 2014.

Further Reading

Find out more information on PED by clicking here.

Jackie Linden

Jackie Linden

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