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Update on Swine Enteric Coronavirus Disease in US

15 December 2014

US - The number of pig farm samples that are confirmed positive for porcine epidemic diarrhoea virus (PEDV) in the last week was 23, and there was one premises with dual infection of PEDV and porcine deltacoronavirus (PDCoV).

For the latest week – 30 November to 6 December 2014 – there were 23 new confirmed positive premises for PEDV and four presumed positive.

For the same period, no premises were confirmed for PDCoV and one presumed positive.

There was one confirmed premise with a dual infection (both PEDV and PDCoV) and two presumed positive.

The total numbers of confirmed positive premises for the latest week were 551, 25 and 20 for PEDV, PDCoV and the dual infection, respectively.

Since 5 June, for PEDV, there have been 568 confirmed positive premises, 344 presumed positive and nine previously positive premises that have attained negative status.

For PDCoV, the total for the same period are 27, 25 and two, respectively. For the dual infection, the totals are 20, 26 and one, respectively.

Table 1. Number of SECD confirmed and presumptive positive premises by month and production class
(includes PEDV, PDCoV and dual infections; confirmed/presumptive)
MonthNurseryWean to finishFarrow to finishFinisherSow/breedingUnknown
Jun-14 17 / 10 29 / 16 14 / 8 22 / 29 46 / 43 14 / 51
Jul-14 25 / 9 36 / 7 6 / 5 20 / 12 32 / 11 16 / 33
Aug-14 15 / 8 17 / 6 2 / 5 25 / 10 10 / 6 10 / 22
Sep-14 17 / 6 21 / 7 2 / 2 30 / 8 29 / 6 6 / 12
Oct-14 1 / 4 24 / 5 2 / 0 33 / 15 6 / 2 12 / 8
Nov-14 4 / 1 4 / 3 1 / 0 34 / 3 10 / 7 18 / 4
Missing 2 / 3 1 / 2 - 0 / 1 2 / 5 0 / 4
Total 81 / 38 132 / 44 27 / 20 164 / 78 135 / 80 76 / 135

 

Table 2. Biological accessions tested and number positive by month
(since 5 June 2014)
 PEDVPDCoV
MonthTestedPositive% positiveTestedPositive% positive
Total before 5 June 2014 21,228 6,976 29.4 2,172 260 12.0
Jun-14 2,768 407 14.7 824 80 9.7
Jul-14 3,555 410 11.5 1,195 46 3.8
Aug-14 3,095.0 312 10.1 1,193 18 1.5
Sep-14 3,143 261 8.3 1,338 11 0.8
Oct-14 3,304 299 9.0 1,899 19 1.0
Nov-14 2,504 304 12.1 1,554 30 1.9
Dec-14 to date 771 110 14.3 450 5 1.1
Total since Jun-14 19,140 2,103 11.0 8,453 209 2.5
Grand total 40,268 9,079 22.5 10,625 469 4.4

Location of Positive Premises

PEDV

There are currently 33 states with at least one confirmed positive case of PEDV, following the addition of Hawaii in mid-November 2014.

For the current week (30 November), there were 110 PEDV-positive laboratory accessions, bringing the total since 5 June 2014 to 2,103. Iowa reported 18 of these new cases; Kansas, 13; North Carolina, 12 and Minnesota, 11.

Also reporting positive results in this most recent week were California, Colorado, Illinois, Indiana, Michigan, Missouri, Nebraska, Oklahoma, South Dakota, Texas, Utah and Wisconsin.

USDA APHIS
Figure 1. PEDV: Cumulative confirmed and presumptive PEDV-positive premises since 5 June 2014

PDCoV

There are currently 17 states with at least one confirmed positive case of PDCoV.

For the current week (30 November), there were five PDCoV-positive laboratory accessions, bringing the total since 5 June 2014 to 204. There were two positive premises each in Iowa and Illinois and one in Minnesota.

USDA APHIS
Figure 2. PDCoV: Cumulative confirmed and presumptive PDCoV-positive premises since 5 June 2014

Dual infection with PEDV and PDCoV

There are currently 13 states with one or more confirmed positive cases of the dual infection with both PEDV and PDCoV.

USDA APHIS
Figure 3. Dual infection: Cumulative confirmed and presumptive positive premises with both PEDV and PDCoV since 5 June 2014

Critical notes about these data are provided at the end of the original report.

Further Reading

Find out more information on PED virus by clicking here
For more information on PDCoV by clicking here.

ThePigSite News Desk

Top image via Shutterstock



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