PED-Positive Submissions: No Sign of Decline in Positive Cases

US - The total number of swine accessions and diagnostic case submissions testing positive for the Porcine Epidemic Diarrhoea (PED) virus now stands at 1,161, writes Jackie Linden. There is no sign of a decline in the rate of increase.
calendar icon 25 November 2013
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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 3 November: suckling, 249 (+16); nursery, 207 (+29); grower/finisher, 388 (+35); sows/boars, 179 (+4) and 144 (+12) unknown. The total is up 92 from the previous week.

No states have reported a first positive result in the last week and so the total affected remains at 19. Those states with 10 or more positive tests are: Iowa, 355; Oklahoma, 227; North Carolina, 205; Kansas, 115; Minnesota, 77; Colorado, 30; Indiana, 29; Ohio, 25; Pennsylvania, 23; and Illinois and Texas, each with 11.

For the week of 10 to 16 November, Iowa again leads the 'league table' in the number of new positive results, accounting for 55 of the total of 92 new cases, with North Carolina and Minnesota reporting 15 and eight, 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 PEDv. Since 16 June, the data refer only to diagnostic cases submissions ('swine accessions').

From the week of 16 June to week of 10 November, the total number of biological (swine) samples testing positive is 3,609, up from 3,241 the previous week (+368). The most-affected states are: North Carolina, 1,042; Oklahoma, 819; Iowa, 567; Kansas, 550; Minnesota, 199; Ohio, 91; Colorado, 84; Pennsylvania, 73; Illinois, 54; Pennsylvania, 50; Indiana and Texas, both 32. Other states, where positive, reported 20 positives or fewer.

In the most recent week reported (week of 10 November), the following states reported one or more positive results: Colorado (2), Iowa (125), Michigan (7), Minnesota (36), Missouri (4), North Carolina (120), Ohio (10), Oklahoma (31), Pennsylvania (23) and Texas (10).

The total number of environmental samples testing positive for PEDv has been reported weekly since the week of 16 June. The total has reached 763, which is 69 more than the previous week's figure. The totals for each state are as follows (with the increase in brackets: Colorado, 14 (=); Iowa, 77 (+24); Illinois, 24 (=); Kansas, 125 (+6); Minnesota, 207 (+19); Missouri, 8 (=); North Carolina, 34 (+14); Ohio, 19 (=); Oklahoma 189 (+6); Pennsylvania, 4 (=); South Dakota, 1 (=); Virginia, 2 (=); unknown, 49(=).

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 20 November.

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

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

Further Reading

Find out more information on PED by clicking here.

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