2012년 4월 26일 미국 농무부 수석 수의관 존 클리포드 박사가 국제수역사무국(OIE)에 보낸 미국 캘리포니아주 광우병 확정진단 보고 내용입니다.

*4월 19일…  렌더링 공장에서 10년 7개월령 젖소에 대한 광우병 검사를 위해 샘플 채취함.
* 해당 동물은 파행(lameness) 증상을 보여 도태시킴(culled) (설명 – 다리를 절고 주저앉는 다우너 증상을 보여 안락사시킴.)
* 캘리포니아 주립대학의 광우병 검사 : 4월 19일 ELISA 검사를 실시했는데 결과는 Doubtful (uncertain)으로 나옴.
* 미국 국립수의과학연구소(NVSL)의 광우병 검사 : 4월 21일 ELISA 검사를 실시했는데 결과는 Doubtful (uncertain)으로 나옴.
4월 23일 면역조직화학검사(IHC)를 실시했는데 광우병 양성으로 나옴.
4월 23일 웨스턴 블로팅 검사를 실시했는데 광우병 양성으로 나옴.
4월 26일 국제수역사무국(OIE)에 비전형 광우병(atypical BSE) 발생 사례 보고함.

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Information received on 26/04/2012 from Dr John Clifford, Deputy Administrator, Animal and Plant Health Inspection Service, United States Department of Agriculture, Washington, United States of America

출처 : http://web.oie.int/wahis/public.php?page=single_report&pop=1&reportid=11893

Summary

Report type	Immediate notification
Start date	19/04/2012
Date of first confirmation of the event	23/04/2012
Report date	26/04/2012
Date submitted to OIE	26/04/2012
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	2006
Manifestation of disease	Sub-clinical infection
Causal agent	Prion (atypical BSE)
Nature of diagnosis	Laboratory (advanced)
This event pertains to	the whole country

New outbreaks

Outbreak 1	Tulare, County, Tulare, County, CALIFORNIA
Date of start of the outbreak	19/04/2012
Outbreak status	Continuing (or date resolved not provided)
Epidemiological unit	Farm
Affected animals	Species Susceptible Cases Deaths Destroyed Slaughtered Cattle 1 1 0
Affected Population	As part of a targeted BSE surveillance at rendering facilities, a deceased dairy cow (10 years and seven months old) was tested for BSE.
Summary of outbreaks	Total outbreaks: 1
Outbreak statistics	Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost* Cattle ** ** ** ** * Removed from the susceptible population through death, destruction and/or slaughter ** Not calculated because of missing information

Epidemiology

Source of the outbreak(s) or origin of infection

Unknown or inconclusive Random mutation

Epidemiological comments

As part of the United States targeted bovine spongiform encephalopathy (BSE) surveillance system a case of BSE classified as atypical was identified in a dead dairy cow that was to be rendered. The dead animal’s carcass will be destroyed. • The cow was culled due to lameness. • The identified animal was never presented for slaughter for human consumption, did not enter food supply channels, and at no time presented any risk to human health. • An epidemiological investigation into the incident has been initiated. • Movement controls have been placed on the index premises.

Control measures

Measures applied	Quarantine Screening No vaccination No treatment of affected animals
Measures to be applied	No other measures

Diagnostic test results

Laboratory name and type	University of California (Local laboratory)
Tests and results	Species Test Test date Result Cattle enzyme-linked immunosorbent assay (ELISA) 19/04/2012 Doubtful (uncertain)
Laboratory name and type	National Veterinary Services Laboratories (NVSL) (National laboratory)
Tests and results	Species Test Test date Result Cattle enzyme-linked immunosorbent assay (ELISA) 21/04/2012 Doubtful (uncertain) Cattle immunohistochemical test 23/04/2012 Positive Cattle western blotting 23/04/2012 Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations

Location of current outbreaks

Click on map to zoom in.