Commission Regulation (EU) No 517/2011Show full title

ANNEX Testing scheme necessary to verify the achievement of the Union target for the reduction of Salmonella Enteritidis and Salmonella Typhimurium in adult laying hens of Gallus gallus, as referred to in Article 1(2)

1. SAMPLING FRAME

The sampling frame shall cover all flocks of adult laying hens of Gallus gallus (‘laying flocks’) within the framework of the national control programmes provided for in Article 5 of Regulation (EC) No 2160/2003.

2. MONITORING IN LAYING FLOCKS

2.1. Frequency and status of sampling

Laying flocks shall be sampled at the initiative of the food business operator and by the competent authority.

Sampling at the initiative of the food business operator shall take place at least every 15 weeks. The first sampling shall take place at the flock-age of 24 +/– 2 weeks.

Sampling by the competent authority shall take place at least:

(a)

in one flock per year per holding comprising at least 1 000 birds;

(b)

at the age of 24 +/– 2 weeks in laying flocks housed in buildings where the relevant Salmonella was detected in the preceding flock;

(c)

in any case of suspicion of Salmonella infection when investigating food-borne outbreaks in accordance with Article 8 of Directive 2003/99/EC or any cases where the competent authority considers it appropriate, using the sampling protocol laid down in point 4(b) of Part D to Annex II to Regulation (EC) No 2160/2003;

(d)

in all other laying flocks on the holding in case Salmonella Enteritidis or Salmonella Typhimurium is detected in one laying flock on the holding;

(e)

in cases where the competent authority considers it appropriate.

A sampling carried out by the competent authority may replace one sampling at the initiative of the food business operator.

2.2. Sampling protocol

In order to maximise the sensitivity of the sampling, and to ensure the correct application of the sampling protocol, the competent authority or the food business operator shall ensure that samples are taken by trained persons.

2.2.1. Sampling by the food business operator

(a) In cage flocks, 2 × 150 grams of naturally pooled faeces shall be taken from all belts or scrapers in the house after running the manure removal system; however, in the case of step cage houses without scrapers or belts 2 × 150 grams of mixed fresh faeces must be collected from 60 different places beneath the cages in the dropping pits.

(b) In barn or free-range houses, two pairs of boot swabs or socks shall be taken.

Boot swabs used must be sufficiently absorptive to soak up moisture. The surface of the boot swab must be moistened using appropriate diluents.

The samples must be taken while walking through the house using a route that produces representative samples for all parts of the house or the respective sector. This shall include littered and slatted areas provided that slats are safe to walk on. All separate pens within a house must be included in the sampling. On completion of the sampling in the chosen sector, boot swabs must be removed carefully so as not to dislodge adherent material.

2.2.2. Sampling by the competent authority

At least one sample must be collected using the sampling protocol in addition to samples referred to under point 2.2.1. Further samples shall be taken in order to ensure representative sampling if required by the distribution or the size of the flock.

In the case of sampling referred to in point 2.1(b), (c), (d) and (e), the competent authority shall satisfy itself by conducting further checks, namely by laboratory tests and/or documentary checks as appropriate to ensure that the results of examinations for Salmonella in birds are not affected by the use of antimicrobials in the flocks.

Where the presence of Salmonella Enteritidis and Salmonella Typhimurium is not detected but antimicrobials or bacterial growth inhibitory effects are detected it shall be considered and accounted for as an infected laying flock for the purpose of the Union target.

The competent authority may decide to allow replacement of one faecal sample or one pair of boot swabs by a dust sample of 100 grams collected from multiple places throughout the house from surfaces with a visible presence of dust. As an alternative one or several moistened fabric swab(s) of at least 900 cm² surface area in total may be used instead to gather dust from multiple surfaces throughout the house, ensuring that each swab is well coated with dust on both sides.

The competent authority may decide to increase the minimum number of samples in order to ensure representative sampling on a case-by-case evaluation of epidemiological parameters, namely the biosecurity conditions, the distribution or size of the flock or other relevant conditions.

3. EXAMINATION OF THE SAMPLES

3.1. Transport and preparation of the samples

Samples shall preferably be sent by express mail or courier to the laboratories referred to in Articles 11 and 12 of Regulation (EC) No 2160/2003, within 24 hours after collection. If they are not sent within 24 hours, they shall be stored refrigerated. The samples may be transported at ambient temperature provided that excessive heat (namely over 25 °C) or exposure to sunlight is avoided. At the laboratory the samples shall be kept refrigerated until examination, which must be started within 48 hours following receipt and within 4 days after sampling.

Separate preparations shall be made of the boot swabs and dust or the fabric dust swab in the case of samples by the competent authority, but as regards samples by food business operators the different sample types may be combined in one test.

3.1.1. Boot and fabric swab samples

(a) The two pairs of boot swabs (or ‘socks’) or dust swabs shall be carefully unpacked to avoid dislodging adherent faecal material, pooled and placed in 225 ml of Buffered Peptone Water (BPW) which has been pre-warmed to room temperature, or the 225 ml of diluent must be added directly to the two pairs of boot swabs in their container as received in the laboratory. The boot/socks or fabric swab shall be fully submersed in BPW to provide sufficient free liquid around the sample for migration of Salmonella away from the sample and therefore more BPW may be added if necessary.

(b) The sample shall be swirled to fully saturate it and culture shall be continued by using the detection method set out in point 3.2.

3.1.2. Other faecal and dust material

(a) The faeces samples shall be pooled and thoroughly mixed and a 25-gram sub-sample shall be collected for the culture.

(b) The 25-gram sub-sample (or 50 ml of suspension containing 25 grams of the initial sample) shall be added to 225 ml of BPW which has been pre-warmed to room temperature.

(c) Culture of the sample shall be continued by using the detection method set out in point 3.2.

If ISO standards on the preparation of relevant samples for the detection of Salmonella are agreed on, they shall be applied and replace those set out in points 3.1.1 and 3.1.2.

3.2. Detection method

The detection of Salmonella shall be carried out according to Amendment 1 of EN/ISO 6579-2002/Amd1:2007 ‘Microbiology of food and animal feeding stuffs – Horizontal method for the detection of Salmonella spp. – Amendment 1: Annex D: Detection of Salmonella spp. in animal faeces and in environmental samples from the primary production stage’ of the International Organization for Standardization.

After incubation the samples in BPW shall not be shaken, swirled or otherwise agitated.

3.3. Serotyping

At least one isolate from each positive sample taken by the competent authority shall be serotyped, following the Kaufmann-White-LeMinor scheme. In isolates taken by the food business operators, at least the serotyping for Salmonella Enteritidis and Salmonella Typhimurium must be carried out.

3.4. Alternative methods

With regard to samples taken on the initiative of the food business operator, alternative methods may be used instead of the methods for the preparation of samples, detection methods and serotyping set out in points 3.1, 3.2 and 3.3 of this Annex, if validated in accordance with the most recent version of EN/ISO 16140.

3.5. Testing for antimicrobial resistance

The isolates shall be tested for antimicrobial resistance in accordance with Article 2 of Commission Decision 2007/407/EC(1).

3.6. Storage of strains

The competent authority shall ensure that at least one isolated strain of the relevant Salmonella serotypes from sampling as part of official controls per house and per year is stored for possible future phagetyping or antimicrobial susceptibility testing, using the normal methods for culture collection, which must ensure integrity of the strains for a minimum period of 2 years.

If the competent authority so decides, isolates from sampling by food business operators shall also be stored for these purposes.

4. RESULTS AND REPORTING

4.1. A laying flock shall be considered positive for the purpose of ascertaining the achievement of the Union target where:

(a)

the presence of the relevant Salmonella serotypes (other than vaccine strains) has been detected in one or more samples taken in the flock, even if the relevant Salmonella serotype is only detected in the dust sample or dust swab; or

(b)

antimicrobials or bacterial growth inhibitors have been detected in the flock.

This rule shall not apply in exceptional cases described in Annex II D point 4 of Regulation (EC) No 2160/2003, where the initial Salmonella positive result has not been confirmed by that respective sampling protocol.

4.2. A positive laying flock shall only be counted once regardless of:

(a)

how often the relevant Salmonella serotype has been detected in this flock during the production period;

or

(b)

whether the sampling was carried out at the initiative of the food business operator or by the competent authority.

However, if sampling during the production period is spread over 2 calendar years, the result of each year shall be reported separately.

4.3. Reporting shall include:

(a)

the total number of adult laying flocks which were tested at least once during the year of reporting;

(b)

the results of the testing including:

(i)

the total number of laying flocks positive with any Salmonella serotype in the Member State;

(ii)

the number of laying flocks positive at least once with Salmonella Enteritidis and Salmonella Typhimurium;

(iii)

the number of positive laying flocks for each Salmonella serotype or for Salmonella unspecified (isolates that are untypable or not serotyped);

(c)

explanations of the results, in particular concerning exceptional cases or any substantial changes in number of flocks tested and/or found positive.

The results and any additional relevant information shall be reported as part of the report on trends and sources provided for in Article 9(1) of Directive 2003/99/EC.

(1)

OJ L 153, 14.6.2007, p. 26.