Highly Pathogenic Avian Influenza In The Netherlands

NETHERLANDS - An outbreak of avian influenza has been reported in the Netherlands.
calendar icon 7 March 2003
clock icon 3 minute read
See also: 23 May 2003, 16 May 2003, 9 May 2003, 2 May 2003, 25 April 2003, 18 April 2003, 11 April 2003, 4 April 2003, 28 March 2003, 21 March 2003, 14 March 2003, 7 March 2003

Information received on 5 March 2003 from Dr Frederik H. Pluimers, Chief Veterinary Officer, Ministry of Agriculture, Nature Management and Fisheries, The Hague:

End of previous report period: 2 March 2003 (see Disease Information, 16 [10], 58, dated 7 March 2003).

End of this report period: 5 March 2003.

Nature of diagnosis: clinical and laboratory.

Date of initial detection of animal health incident: 28 February 2003.

Estimated date of first infection: 21 February 2003.


Registration No. Location
03/01 Gelderland
03/02 Gelderland

Description of affected population in the outbreaks: laying hens / free range poultry holdings.

Total number of animals in the outbreaks:

species susceptible cases deaths destroyed slaughtered
avi 44,600 20-95% 20-95% 44,600 0


A. Laboratory where diagnosis was made: Central Institute for Animal Disease Control (CIDC), Lelystad.

B. Diagnostic tests used: virus isolation in embryonated fowl eggs, haemagglutination inhibition test.

C. Causal agent: Highly pathogenic avian influenza virus subtype H7. For outbreak No. 03/01, nucleotide sequencing has demonstrated the presence of multiple basic amino acids at the cleavage site of the haemagglutinin.


A. Source of agent / origin of infection: the type of strain isolated on one of the infected holdings and the fact that both of the holdings had free-housing facilities strongly suggests introduction via waterfowl.

B. Mode of spread: possibly by indirect contact with waterfowl.

Control measures during reporting period:

- quarantine, and movement control inside the country;

- stamping out;

- screening;

- zoning;

- Outbreak 03/01 and outbreak 03/02 were culled on 5 March 2003;

- All carcasses are being destroyed by incineration.


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