# Presentation: 137397

## Teaching WorkshopBovine Spongiform Encephalopathy (BSE)

- APHIS BSE Surveillance Program

## Targeted surveillance

**Non-ambulatory animals**
**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**

**Notes:**
These are broad categories of US surveillance.

VDL - State veterinary diagnostic labs

## 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

## Surveillance goals

- 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

## Surveillance goals

- 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

**US Regions**

**Notes:**
Surveillance of free ranging cervids.

## 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)

**40**

**175**

**251**

**736**

**692**

**744**

**1143**

**2713**

**1080**

**1302**

**2681**

**5272**

**19,990**

**20,543**

**8150**

## Surveillance: NVSL Bovine Brain Submissions FY 93-04 (through 12/31/03)

## Adustments to U.S. BSE Surveillance? 

**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.