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2.4 Programme results 1995 – 2004 / Poultry
2.4.1 Laying hen production line
Salmonella was found at egg producing parent and grandparent holdings in 1995
to 2004 only once in 2004 (Table 13).
Salmonella was only isolated from 1- 6 flocks annually among flocks of production-generation
laying hens in 1995 to 2000 and 2004, and none at all in 2001 to
2003. For production-generation rearing facilities, Salmonella was found during
four years; 1995, 1997, 2003 and 2004 (Table 14).
Altogether seven serotypes were identified from laying hens (Table 15). Salmonella
Typhimurium was the most common serotype and DT 1 the most common
phage type (Appendix 1). The serotype Salmonella Enteritidis, transferred through
products containing raw eggs and thus presenting a greater health risk to people,
was found during two years (1995 and 1999, Table 15) and their phage types
were DT 1 and DT 4. As for the occurrence in 1995, eggs from a holding with
Enteritidis DT 1 caused two epidemics among people.
Poltry production
holdings
Rearing period
Production
period
Year
Total no.
of flocks
tested *
No. of
positive
flocks
Breeding flocks of Gallus gallus
Salmonella control and occurence of Salmonella from 1995 to 2004
% positive
flocks
No. of
positive
holdings
1996 544 0 0 0
1997 441 0 0 0
1998 303 0 0 0
1999 227 0 0 0
2000 318 0 0 0
2001 290 0 0 0
2002 221 0 0 0
2003 98 0 0 0
2004 102 0 0 0
1996 106 0 0 0
1997 62 0 0 0
1998 203 0 0 0
1999 36 0 0 0
2000 145 0 0 0
2001 144 0 0 0
2002 262 0 0 0
2003 74 0 0 0
2004 67 1 1,5 1
* Flocks are examined every second months at the holding. The same flock repeatedly
may appear in the numbers.
Table 13. Breeding flocks of
Gallus gallus egg production line
- sampling at holdings