No Change in US Pig Farm Samples Positive for Porcine Delta Corona Virus

US - No new positive results for Porcine Delta Corona virus (PDCoV) have been detected in the US in the last week, so the total number of positive samples so far remains at 381 from pig farms in 17 states.

5 September 2014

4 minute read

By: Jackie Linden

North America

For the latest weekly report - for the week of 24 August in a report dated 3 September from the USDA Animal Health Inspection Service and made available by the American Association of Swine Veterinarians (AASV) - no pig farms (termed "swine accessions") have tested positive for the PDCoV, so the cumulative total to 381.

The National Animal Health Laboratory Network (NAHLN) began collating testing data on PDCoV for the week of 30 March 2014. So far, 5,262 accessions have been tested, 266 in the most recent week reported, so the overall percentage found positive is 7.2 per cent.

The total number of states affected remains at 17 (Table 1 and Figure 1).

Test week	Posi- tive acces- sions	CA	IA	IL	IN	KS	MI	MN	MO	MT	NC	NE	OH	OK	PA	SD	TX	WY	Un- known
Table 1. PDCoV summary by state
30-Mar	25	-	3	4	1	-	4	6	-	1	-	-	6	-	-	-	-	-	-
6-Apr	32	-	4	2	7	-	2	5	-	-	-	1	7	-	1	1	1	-	1
13-Apr	29	-	5	8	4	-	1	7	-	-	1	-	1	-	1	-	-	-	1
20-Apr	28	-	2	3	3	-	-	10	1	-	1	1	3	-	3	-	1	-	-
27-Apr	33	-	3	7	3	1	1	11	1	-	1	2	2	-	-	1	-	-	-
4-May	41	-	3	10	5	-	2	6	1	-	4	2	5	-	1	1	-	-	1
11-May	23	-	2	2	3	-	-	8	-	-	-	2	3	-	-	2	-	-	1
18-May	19	-	-	2	3	-	1	5	-	-	1	-	3	-	-	3	-	-	1
25-May	15	-	-	5	2	-	-	4	-	-	1	-	2	-	1	-	-	-	-
1-Jun	22	-	-	3	4	1	-	5	-	1	-	-	4	1	-	2	-	-	1
8-Jun	20	-	-	2	1	-	1	4	2	-	1	2	1	-	2	3	-	-	1
15-Jun	17	-	3	1	2	-	-	3	1	-	-	-	4	-	1	1	-	-	1
22-Jun	15	-	1	-	2	-	-	3	-	-	-	-	5	-	1	2	-	-	1
29-Jun	8	-	2	-	-	-	1	1	1	-	1	-	-	-	1	-	-	-	1
6-Jul	17	-	7	1	1	-	1	5	-	-	-	-	1	-	1	-	-	-	-
13-Jul	14	1	2	1	2	-	-	1	-	-	-	-	5	-	-	1	-	1	-
20-Jul	5	1	1	1	-	-	-	2	1	-	-	-	-	-	-	-	-	-	-
27-Jul	8	-	2	-	-	-	-	2	-	-	-	-	2	-	-	-	2	-	-
3-Aug	3	-	-	-	-	-	-	-	1	1	-	2	-	-	-	-	-	-	-
10-Aug	3	1	-	1	-	-	-	-	-	-	-	-	1	-	-	-	-	-	-
17-Aug	6	-	1	-	1	-	1	-	1	-	-	2	-	-	-	-	-	-	-
23-Aug	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
Total	381	3	41	53	43	2	15	87	9	2	11	14	55	1	13	17	4	1	10
*A single accession may include samples tested over more than one week; total accessions are calculated- as the distinct number of accessions tested rather than the sum of accessions tested by week.

Figure 1. PDCoV-positive samples from biological accessions (pig farms)

PDCoV was previously known as Swine Delta Corona virus (SDCv). It is related and causes similar effects to the virus that causes Porcine Epidemic Diarrhoea (PED).

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