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Update on Swine Enteric Coronavirus Disease in US

11 May 2015

US - The number of pig farm samples that are confirmed positive for porcine epidemic diarrhoea virus (PEDV) in the last week was 17, while three premises were confirmed with porcine deltacoronavirus (PDCoV) and none with the dual infection (PEDV and PDCoV).

For the latest week – 26 April to 2 May – there were 17 new confirmed positive premises for PEDV and one presumed positive, according to the latest report from USDA Animal and Plant Health Inspection Service (APHIS).

For the same period, three premises were confirmed positive for PDCoV but none presumed positive. For the dual infection, one premised was confirmed positive for the virus and one presumed positive.

The total numbers of premises with confirmed positive status for the current week are 1,223, 58 and 47 for PEDV, PDCoV and the dual infection, respectively.

Since 5 June, for PEDV, there have been 1,307 confirmed positive premises, 428 presumed positive and 72 previously positive premises that have attained negative status.

For PDCoV, the total for the same period are 64, 29 and five, respectively. For the dual infection, the totals are 49, 28 and one, respectively.

Table 1. Number of swine enteric coronavirus disease (SECD) confirmed and presumptive positive
premises by month and production class

(includes PEDV, PDCoV and dual infections; confirmed/presumptive)
MonthNurseryWean to
finish
Farrow to
finish
FinisherSow/
breeding
Un-
known
Jun-14 21 / 13 31 / 17 14 / 8 24 / 28 47 / 46 13 / 52
Jul-14 25 / 12 39 / 8 6 / 5 21 / 15 35 / 14 13 / 30
Aug-14 15 / 8 17 / 8 2 / 5 25 / 10 12 / 7 11 / 18
Sep-14 17 / 5 21 / 7 2 / 3 31 / 9 30 / 6 6 / 12
Oct-14 4 / 4 30 / 7 4 / 0 37 / 16 11 / 3 5 / 7
Nov-14 7 / 1 19 / 3 3 / 0 45 / 6 13 / 10 14 / 7
Dec-14 19 / 1 45 / 2 12 / 4 62 / 8 21 / 4 8 / 4
Jan-15 20 / 3 72 / 7 9 / 0 74 / 12 19 / 1 40 / 5
Feb-15 20 / 1 48 / 2 7 / 0 60 / 7 17 / 1 32 / 2
Mar-15 18 / 4 44/ 0 6 / 1 29 / 1 15 / 0 21 / 3
Apr-15 4 / 0 4 / 1 2 / 0 8 / 2 3 / 0 1 / 0
Total 170 / 52 372 / 62 67 / 26 418 / 115 224 / 91 169 / 139

 

Table 2. Biological accessions tested and number positive by month
(since 5 June 2014)
 PEDVPDCoV
MonthTestedPositive% positiveTestedPositive% positive
Total before 5 June 2014 21,128 6,976 33.0 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 3,095 312 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 2,505 305 12.2 1,555 30 1.9
Dec-14 3,237 446 13.8 1,982 50 2.5
Jan-15 3,089 500 16.2 1,845 44 2.4
Feb-15 2,981 461 15.5 1,802 49 2.7
Mar-15 3,304 597 18.1 1,898 58 3.1
Apr-15 3,019 451 14.9 1,788 31 1.7
May-15 to date 121 21 17.4 69 3 4.3
Total since Jun-14 34,139 4,476 13.1 17,421 443 2.5
Grand total 55,267 11,452 20.7 19,593 703 3.6
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.

For the current week (26 April), there were 76 PEDV-positive laboratory accessions, bringing the total since 5 June 2014 to 4,478. Iowa reported 20 of these new cases, Minnesota 14 and North Carolina 13.

Also reporting positive results in this most recent week were Illinois, Indiana, Kansas, Michigan, Missouri, Nebraska, Ohio, Oklahoma, Utah, Wyoming and "unknown".

USDA APHIS
Figure 3. PEDV: Cumulative confirmed and presumptive PEDV-positive premises since 5 June 2014

PDCoV

There are currently 19 states with at least one confirmed positive case of PDCoV.

For the current week (26 April), there were 10 PDCoV-positive laboratory accessions, bringing the total since 5 June 2014 to 439. There was four positive premises in Iowa, three in Illinois, two in Minnesota and one in Texas.

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 14 states with one or more confirmed positive cases of the dual infection with both PEDV and PDCoV.

Most-affected states with the dual infection are Iowa and Minnesota, with 20 and 10 confirmed positive results, respectively.

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



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