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PED-Positive Submissions: Half of New Virus-positive Results in Iowa

20 December 2013

US - The total number of swine accessions and diagnostic case submissions testing positive for the Porcine Epidemic Diarrhoea (PED) virus now stands at 1,645, writes Jackie Linden. New York has reported its first virus-positive environmental sample since June 2013.

By farm class, this figure for the total number of positive laboratory swine accessions/diagnostic case submissions breaks down as follows between the weeks of 15 April and 8 December: suckling, 355 (+22); nursery, 311 (+36); grower/finisher, 515 (+37); sows/boars, 208 (+9) and 270 (+29) unknown. The total is up 132 from the previous week.

No states have reported their first positive results in the last week and so the total number of states affected remains at 20. Those states with 10 or more positive tests are: Iowa, 559; Oklahoma, 262; North Carolina, 258; Minnesota, 153; Kansas, 131; Indiana, 52; Ohio, 47; Colorado and Illinois, 34; Pennsylvania, 27 and Texas, 23.

For the most recent week, Iowa again leads the 'league table' in the number of new positive results, accounting for 65 of the total of 132 new cases, followed by Minnesota with 18 and North Carolina with 12.

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 week of 8 December, the total number of biological (swine) samples testing positive is 5,137, up from 4,694 the previous week (+445). The most-affected states by this measure are: North Carolina, 1,474; Iowa, 969; Oklahoma, 964; Kansas, 605; Minnesota, 379; Ohio, 169; Illinois, 130; Colorado, 111; Pennsylvania, 80; Texas, 74 and Indiana, 67. Other states, where positive, reported 50 positives or fewer.

In the most recent week reported (week of 8 December), the following states reported one or more positive results: Iowa (126), Illinois (27), Indiana (8), Kansas (13), Michigan (2), Minnesota (33), Missouri (20), North Carolina (167), Ohio (6), Oklahoma (25), Pennsylvania (1) and Texas (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 1,215, which is 65 more than the previous week's figure. The totals for each state are as follows (with the increase in brackets: Colorado, 18 (=); Iowa, 156 (+13); Illinois, 32 (=); Kansas, 151 (+3); Minnesota, 406 (+27); Missouri, 21 (=); North Carolina, 65 (+7); Nebraska, 4 (=); New York 1 (+1); Ohio, 47 (+5); Oklahoma 247 (+5); Pennsylvania, 9 (+5); South Dakota, 2 (=); Tennessee, 3 (=); Texas, 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 18 December.

Total number of swine samples testing positive for PEDv per week.
(Laboratories began reporting number of samples the week of 16 June 2013)

Cumulative number of swine samples testing positive for PEDv.
(Laboratories began reporting number of samples the week of 16 June 2013)

Further Reading

Find out more information on PED by clicking here.

Jackie Linden

Jackie Linden

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