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From: TSS (
Date: November 9, 2004 at 7:01 am PST

-------- Original Message --------
Date: Mon, 8 Nov 2004 12:06:29 -0600
From: "Terry S. Singeltary Sr."
Reply-To: Bovine Spongiform Encephalopathy

##################### Bovine Spongiform Encephalopathy #####################


National Center for Animal Health Programs
Eradication and Surveillance Team
September 30, 2004

Scrapie Flock Certification Program

As of September 30, 2004, there were 1,868 flocks participating in the Scrapie Flock Certification Program (SFCP) Of these flocks 135 were certified flocks. 1,726 were complete monitored flocks, and 7 were selective monitored flocks (figure 1) New status from 1997 to
2004 are depicted in chart 1. There were 11 flocks newly enrolled or certified in September
2004 (figure 2). New statuses in FY 2004 are depicted in chart 2.

Infected and Source Flocks

As of September 30, 2004, there were 70 scrapie infected and source flocks (figure 3). There
were 5 new infected and source flocks reported in September (figure 4) with a total of 103 flocks reported for FY 2004 (figure 5). The total infected and source flocks that have been released in FY 2004 are 77 (figure 6), with 5 flocks released in September. The ratio of infected and source flocks released to newly infected and source flocks for F Y 2004 = 0.75 :
1. In addition, as of September 30. 2004, 368 scrapie cases have been confirmed and reported
by the National Veterinary Services Laboratories (NVSL) in FY 2004, of which 54 were RSSS
cases (figure 7). This includes 6 newly confirmed cases in September 2004 (figure 8)
Thirteen cases of scrapie in goats have been reported since 1990 (figure 9). One new
goat case was reported in FY 2004. New infected flocks, source flocks, and flocks released
or put on clean-up plans for FY 2004 are depicted in figure 10.

Scrapie: Ovine Slaughter Surveillance (SOSS)

The Center for Epidemiology and animal Health (CEAH)has released the results of the Phase II: SOSS study . The objective of SOSS was
to estimate the national and regional prevalence of scrapie in mature cull ewes. Prior to the SOSS study, the prevalence of scrapie in the Unted Stales was estimated to be 0.07 percent (based on information from NAHMS Sheep '96 unpublished data). The SOSS study estimate for the national prevalence in mature ewes is 0.20 percent. The prevalence phase of the SOSS study started April 1, 2002, and continued through March 31, 2003. During this time period, samples were collected from 12,508 mature sheep at 22 slaughter facilities, as well as a major livestock market

SOSS Continued:

Of the 12,508 sheep tested, 33* were found to be scrape positive: 27 black face; 3 mottled
face; 1* white face; and 2 of unknown face color. Note: The raw prevalence is higher than the weighted prevalence. The difference is the result of weighing each positive based on the number of sheep sampled and the number of sheep killed at each plant.

Regulatory Scrape Slaughter Surveillarce (RSSS)+

RSSS started April 1, 2003. It is a targeted slaughter surveillance program which is designed
to identify infected flocks forclean-up. Samples have been collected from 31,237 sheep since Apiil 1, 2003, of which results have been reported for 28,677. Samples have been submtted from 41 plants. There have been 77 NVSL confirmed positive sheep. There have been 54 NVSL confirmed positive cases in FY 2004. Face colors of these postimes were 46 black, 6 mottled, and 2 white. During September 2004, 1,546** animals were sampled and test results were reported on 2,118 by NVSL. Three new confirmed positives were reported by NVSL in September 2004. The number of RSSS samples collected by month, region and total in FY 2004 are shown in figure 11.

Scrapie Testing

In FY 2004, 25,006 animals have been tested for scrapie: 21,754 RSSS; 2,687 regulatory field cases; 461 regulatory third eyelid biopsies; 13 third eyelid validations; and 91 necropsy validations (figure 12).

Animal ID

As of September 30, 2004, 90,322 sheep and goat premises have been assigned identification numbers in the Sciapie National Genenic Database. Official eartags have been issued to 64,040
of these premises.

* This number was decreased by one case as a result of a clerical error compared to the FY
2003 annual report.

** The number of animals sampled in August has increased from the August report due to late
reporting; a similar increase is likely to be seen for September in the October report.

+ As of May 2004 we are reporting only NVSL confirmed postive cases.

The U.S. sheep industry had 7.6 million sheep and lambs on farms as
of July 2004. 11/8/04 11:22 AM


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