The requirement for pre-housing swabs to be taken from a poultry house is not new. Indeed, it has long been a requirement of the Lion Code. What is new, however, is that version 8 of the Lion Code requires the results of the samples submitted for Salmonella testing to be available and be negative for a regulated Salmonella serovar before restocking.
The challenge from Salmonella has not gone away and we occasionally see cases. If a flock were to be housed before the site receives a negative result for a regulated Salmonella serovar (S. enteritidis, S. typhimurium, monophasic S. typhimurium, S.hadar, S.Infantis, S.Virchov) and the result was to be confirmed positive, this would require the suspension of the positive house from the Lion scheme. As it is a requirement that all houses on site are Lion registered, this would in effect be the removal of the site from the Lion scheme for that flock cycle.
The Lion Code states, ‘post cleaning’, therefore this could be carried out after washing with a detergent and prior to disinfection. Whilst the best approach would be to conduct swabbing after full disinfection, taking swabs part-way through the cleaning and disinfection programme could help ensure results are available without having to extend turnround times.
We understand that the process will potentially add 5 days to turnaround hence why a 12-month derogation until 31st May 2024 has been introduced to adjust programming to accommodate the requirement that a negative result must be obtained prior to housing.
Veterinary advice is that it is simply too risky to place ‘clean’ pullets into a house without knowing its Salmonella status. It would certainly be very risky from a financial point of view and added to this, there could be some awkward questions asked by an insurance provider if birds were housed before the house had tested negative and the flock subsequently went positive.
The majority of vets would also agree that allowing the house to rest for a few extra days can help to reduce the general disease challenge to the replacement flock and birds/production could benefit.
If post cleaning swab results are not available when pullets are due to be placed, arrangements should be made to postpone delivery. If birds are placed before the results are received but they are negative the site will receive a CRITICAL NC and will be put on special measures (i.e. 6 monthly audits).
In summary, the amendment protects producers as well as the Lion scheme in general.