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Update on Swine Enteric Coronavirus Disease in US

30 December 2014

US - The number of pig farm samples that are confirmed positive for porcine epidemic diarrhoea virus (PEDV) in the last week was 12, and there was one premises confirmed with porcine deltacoronavirus (PDCoV).

For the latest week – 14 to 21 December 2014 – there were 12 new confirmed positive premises for PEDV and two presumed positive.

For the same period, one premises was confirmed for PDCoV and none presumed positive.

There were no premises found with a dual infection (both PEDV and PDCoV).

The total numbers of confirmed positive premises for the latest week were 584, 23 and 21 for PEDV, PDCoV and the dual infection, respectively.

Since 5 June, for PEDV, there have been 603 confirmed positive premises, 352 presumed positive and 15 previously positive premises that have attained negative status.

For PDCoV, the total for the same period are 28, 26 and five, respectively. For the dual infection, the totals are 21, 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 18 / 11 30 / 16 15 / 8 22 / 28 47 / 45 14 / 52
Jul-14 25 / 12 36 / 8 6 / 5 20 / 13 33 / 12 15 / 33
Aug-14 15 / 8 17 / 6 2 / 5 25 / 10 10 / 6 10 / 22
Sep-14 17 / 3 21 / 5 2 / 2 30 / 8 31 / 7 6 / 14
Oct-14 2 / 4 24 / 5 2 / 0 33 / 15 6 / 2 11 / 8
Nov-14 5 / 1 10 / 3 1 / - 40 / 5 11 / 8 21 / 8
Dec-14 2 / - 1 / 1 2 / - 4 / - 3 / 1 5 / -
Missing - / 1 1 / 1 - / - 1 / - - / 1 - / 1
Total 84 / 39 140 / 45 30 / 20 175 / 79 141 / 82 82 / 139

 

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 2,506 305 12.2 1,556 30 1.9
Dec-14 to date 2,293 338 14.7 1,367 31 2.3
Total since Jun-14 20,665 2,332 11.3 9,373 235 2.5
Grand total 41,793 9,308 22.3 11,545 495 4.3
5m Publishing
Figure 1. PED-positive biological accessions in the US, by week (since 5 June 2014)
5m Publishing
Figure 2. PDCoV-positive biological accessions in the US, by week (since 5 June 2014)

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 (14 December), there were 115 PEDV-positive laboratory accessions, bringing the total since 5 June 2014 to 2,332. Iowa reported 26 of these new cases, Missouri 11 and Minnesota, 10.

Also reporting positive results in this most recent week were Arizona, California, Colorado, Idaho, Illinois, Indiana, Kansas, Michigan, North Carolina, Nebraska, Ohio, Oklahoma, South Dakota, Texas, Utah, Wisconsin and Wyoming.

USDA APHIS
Figure 3. 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 (14 December), there were 15 PDCoV-positive laboratory accessions, bringing the total since 5 June 2014 to 235. There were five positive premises in Illinois, three in Iowa and one each in Idaho, lndiana and South Dakota, and four "unknown".

USDA APHIS
Figure 4. 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 5. 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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