| Teaching Workshop: Bovine Spongiform Encephalopathy
(BSE)
APHIS BSE Surveillance Program
Targeted surveillance
(These are broad categories of US surveillance. )
- Non-ambulatory animal
- Dead stock
- Field CNS Cases and on-farm suspects
- Veterinary Diagnostic Laboratory data
- Public health laboratories
- CNS condemns at slaughter and other antemortem condemns in
certain categories
Surveillance goals
- Surveillance at a level sufficient to find 1 case per 1 million
adult cattle, 95% confidence
- Based on estimates of targeted high risk population
- Non-ambulatory - 195,000
- Broader estimate, including deads and other condemns -
600,000
- Adult cattle population - 45 million
- Estimate high risk population
- FSIS condemns (CNS, emaciation, tetanus, deads, injuries,
moribund) - 194,225
- CNS on farm FAD's - 129
- Dead on farm of unknown causes (NAHMS, NASS estimates)
- 340,000
- Total - 534,354
- Rounded total estimate = 600,000
- FY 02 and FY 03 - goal was 12,500
- Based on estimate of non-ambulatory animals as targeted
population (195,000)
- FY 04 - goal is at least 40,000
- Based on broader estimate of targeted population (600,000)
- Statistical calculation is 38,462 samples necessary, rounded
up to 40,000
Surveillance: US Regions
(Surveillance of free ranging cervids.)
- GRAPHIC - Map of U.S. showing surveillance regions: Northwest,
Southwest, North Central, Central, South Central, Northeastern,
Eastern, Southeastern
US Regional Goals
BSE Surveillance (through 12/31/03)
| |
FY01
Goal |
FY01 |
FY02
Goal |
FY02 |
FY03
Goal |
FY03 |
FY04
Goal |
FY04 |
| NW |
564 |
695 |
1,205 |
2,224 |
1,205 |
781 |
4832 |
489 |
| SW |
466 |
564 |
1,976 |
2,753 |
1,976 |
3,645 |
4172 |
470 |
| C |
766 |
332 |
1,590 |
2,356 |
1,590 |
2,628 |
6640 |
1403 |
| SC |
734 |
872 |
1,509 |
1,810 |
1,509 |
1,690 |
6380 |
1251 |
| NC |
606 |
620 |
2,561 |
3,780 |
2,561 |
5,620 |
5180 |
1990 |
| NE |
462 |
805 |
2,140 |
2,190 |
2,140 |
2,595 |
3912 |
1004 |
| E |
312 |
401 |
363 |
1,381 |
363 |
514 |
2644 |
507 |
| SE |
644 |
953 |
1,005 |
3,156 |
1,005 |
2,800 |
5580 |
1030 |
BSE Surveillance: Yearly totals May 1990 - FY 2004 (thru 12/31/2003)
BAR GRAPH - datasheet provided below.
| |
1990 |
1991 |
1992 |
1993 |
1994 |
1995 |
1996 |
1997 |
1998 |
1999 |
2000 |
2001 |
2002 |
2003 |
2004 |
| NVSL |
22 |
73 |
67 |
412 |
495 |
465 |
584 |
856 |
731 |
993 |
2305 |
4870 |
19777 |
20277 |
8150 |
| VDL's |
18 |
102 |
184 |
324 |
197 |
279 |
395 |
1857 |
349 |
309 |
376 |
402 |
213 |
266 |
|
| CDC |
|
|
|
|
|
|
163 |
|
|
|
|
|
|
|
|
Surveillance: NVSL Bovine Brain Submissions FY 93-04 (through 12/31/03)
BAR GRAPH - datasheet provided below.
| |
93 |
94 |
95 |
96 |
97 |
98 |
99 |
'00 |
'01 |
'02 |
'03 |
'04 |
| Total Submissions |
412 |
495 |
465 |
584 |
855 |
731 |
988 |
2309 |
4870 |
19777 |
20277 |
8150 |
| Downers (fallen stock) |
|
199 |
223 |
266 |
219 |
344 |
651 |
1895 |
4464 |
14951 |
16560 |
6360 |
| Dead stock |
|
|
|
|
|
|
|
|
|
2759 |
3090 |
1266 |
Adustments to U.S. BSE Surveillance?
- Our surveillance objective remains the same
- Have taken an even more conservative approach by re-evaluating
the size of our at-risk population and increasing the number sampled
- Bulk of the sampling still dead and non-ambulatory animals
(on farm, renderers, pet food plants)
- Will adjust geographic sampling distributions if needed
What are we asking of FSIS?
- Call APHIS-Veterinary Services if you condemn an adult animal
ante-mortem for CNS signs - as requested in the past
- Call APHIS-Veterinary Services if you condemn an adult animal
ante-mortem for non-ambulatory disabled.
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