US - The number of pig farm samples that are confirmed positive for porcine epidemic diarrhoea virus (PEDV) in the last week was 26, two premises were confirmed with porcine deltacoronavirus (PDCoV) but one had the dual infection (PEDV and PDCoV). The first PED-positive farm has been reported in Maryland.
For the latest week – 12 to 18 April – there were 26 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, two premises were confirmed and one presumed positive for PDCoV; one was confirmed positive but none presumed positive for the dual infection.
The total numbers of premises with confirmed positive status for the current week are 1,195, 55 and 46 for PEDV, PDCoV and the dual infection, respectively.
Since 5 June, for PEDV, there have been 1,274 confirmed positive premises, 424 presumed positive and 67 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)
|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||15 / 3||42/ 0||6 / 1||29 / 1||11 / 0||19 / 1|
|Apr-15||3 / 0||1/ 1||0 / 0||5 / 1||1 / 0||0 / 0|
|Total||162 / 51||365 / 62||64 / 26||412 / 112||217 / 92||162 / 137|
|Table 2. Biological accessions tested and number positive by month
(since 5 June 2014)
|Month||Tested||Positive||% positive||Tested||Positive||% positive|
|Total before 5 June 2014||21,128||6,976||33.0||2,172||260||12.0|
|Apr-15 to date||1,802||302||16.8||1,033||15||1.5|
|Total since Jun-14||32,800||4,306||13.1||16,595||424||2.6|
Location of Positive Premises
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 (12 April), there were 113 PEDV-positive laboratory accessions, bringing the total since 5 June 2014 to 4,308. Iowa reported 39 of these new cases, North Carolina 25 and Missouri 13.
Also reporting positive results in this most recent week were Illinois, Indiana, Kansas, Maryland, Michigan, Minnesota, Nebraska, Ohio, Oklahoma, South Dakota, Texas, Utah and "unknown".
There are currently 19 states with at least one confirmed positive case of PDCoV.
For the current week (12 April), there were four PDCoV-positive laboratory accessions, bringing the total since 5 June 2014 to 421. There was one positive premises in each of the following states: Illinois, Indiana, Minnesota and North Carolina.
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. APHIS has not updated the table giving the location of the new positive results this week.
Critical notes about these data are provided at the end of the original report.
ThePigSite News Desk