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Update on Swine Enteric Coronavirus Disease in US

04 May 2015

US - The number of pig farm samples that are confirmed positive for porcine epidemic diarrhoea virus (PEDV) in the last week was 16, while no premises were confirmed with porcine deltacoronavirus (PDCoV) or the dual infection (PEDV and PDCoV).

For the latest week – 19 to 25 April – there were 16 new confirmed positive premises for PEDV and three presumed positive, according to the latest report from USDA Animal and Plant Health Inspection Service (APHIS).

For the same period, no premises were confirmed or presumed positive for PDCoV or the dual infection.

The total numbers of premises with confirmed positive status for the current week are 1,206, 55 and 46 for PEDV, PDCoV and the dual infection, respectively.

Since 5 June, for PEDV, there have been 1,290 confirmed positive premises, 427 presumed positive and 72 previously positive premises that have attained negative status.

For PDCoV, the total for the same period are 61, 29 and five, respectively. For the dual infection, the totals are 48, 27 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 16 / 1 48 / 2 6 / 0 59 / 6 17 / 1 32 / 2
Mar-15 16 / 4 43/ 0 6 / 1 29 / 1 14 / 0 21 / 3
Apr-15 3 / 0 3/ 1 1 / 0 7 / 1 1 / 0 0 / 0
Total 167 / 52 368 / 62 65 / 26 416 / 113 220 / 91 163 / 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 to date 2,480 396 16.0 1,454 24 1.7
Total since Jun-14 33,479 4,400 13.1 17,018 433 2.5
Grand total 54,607 11,376 20.8 19,190 693 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. Maryland has reported its first positive result in this week's report.

For the current week (19 April), there were 94 PEDV-positive laboratory accessions, bringing the total since 5 June 2014 to 4,402. Iowa reported 35 of these new cases, North Carolina 25 and North Carolina 10.

Also reporting positive results in this most recent week were Illinois, Indiana, Kansas, Minnesota, Ohio, Oklahoma, Pennsylvania, Utah, Virginia, Wisconsin, 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 (19 April), there were eight PDCoV-positive laboratory accessions, bringing the total since 5 June 2014 to 429. There was four positive premises in Iowa, two in Illinois and one each in Minnesota and Ohio.

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 19 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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