OIE: Highly pathogenic avian influenza, South Africa

OIE: Highly pathogenic avian influenza, South Africa
submited by kickingbird at Apr, 13, 2011 7:34 AM from OIE

Information received on 12/04/2011 from Dr Bothle Michael Modisane, Chief Director Partnerships, Department of Agriculture, Forestry and Fisheries, Food Safety and Biosecurity, PRETORIA, South Africa

Summary

Report type	Immediate notification
Start date	01/02/2011
Date of first confirmation of the event	16/03/2011
Report date	11/04/2011
Date submitted to OIE	12/04/2011
Reason for notification	Reoccurrence of a listed disease
Date of previous occurrence	07/2006
Manifestation of disease	Clinical disease
Causal agent	Highly pathogenic avian influenza virus
Serotype	H5N2
Nature of diagnosis	Laboratory (advanced)
This event pertains to	the whole country

New outbreaks

Summary of outbreaks

Total outbreaks: 5

Location(s)

WESTERN CAPE PROVINCE (AI_WCP2011_01, Oudtshoorn; AI_WCP2011_02, Uniondale; AI_WCP2011_03, Oudtshoorn; AI_WCP2011_04, Oudtshoorn; AI_WCP2011_05, Uniondale)

Total animals affected

Species	Susceptible	Cases	Deaths	Destroyed	Slaughtered
Birds	14913	100 **	100	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Birds	**	0.67%	**	0.67%

* 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
Epidemiological comments	Commercial ostrich farms. Farms tested positive on serology during routine surveillance, but tested negative on PCR and no virus could be found. Diagnosis only confirmed after several follow-up PCR tests. South Africa only reports outbreaks on confirmation on PCR tests. Initially no clinical signs or mortalities were seen.

Control measures

Measures applied	Quarantine Screening Vaccination prohibited No treatment of affected animals
Measures to be applied	Stamping out

Diagnostic test results

Laboratory name and type

Agricultural Research Council - Onderstepoort Veterinary Institute (ARC – OVI) (National laboratory)

Tests and results

Species	Test	Test date	Result
Birds	haemagglutination inhibition test (HIT)	16/03/2011	Positive
Birds	real-time PCR	09/04/2011	Positive
Birds	real-time PCR	12/04/2011	Positive

Future Reporting

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

See Also:

http://www.oie.int

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