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The establishments and groups of aquaculture establishments keeping listed species within a surveillance zone must undergo surveillance as provided for in Article 98 to check for infection with the relevant category A disease. The surveillance must include health visits, including sampling from production units. Those visits must be carried out by the competent authority in accordance with Tables 1 and 2.
The criteria set out in point 1 of Annex XII, as appropriate for the species, apply to sampling.
Scheme for surveillance comprising health visits and samplings in establishments and groups of establishments for category A diseases in aquatic animals, except epizootic hematopoietic necrosis
| Category A disease | Number of health visits per year | Number of laboratory examinations per year | Number of animals in the sample | Period of the year for sampling | Residency period of the sampled animals in the establishment |
|---|---|---|---|---|---|
| Infection with Mikrocytos mackini | 1 | 1 | 150 | When the prevalence of infection is known to be maximal or April–May, after 3–4 months period when seawater temperatures are less than 10 °C | 4 months |
| Infection with Perkinsus marinus | 1 | 1 | 150 | When the prevalence of infection is known to be maximal or in the month of September, October or November | 4 months |
| Infection with Taura syndrome virus | 2 | 2 | 150 | In the period of the year when water temperature is likely to reach its highest annual level | 2 months |
| Infection with Yellow head syndrome virus | 2 | 2 | 150 | In the period of the year when water temperature is likely to reach its highest annual level | 2 months |
Specific scheme for surveillance comprising health visits and samplings in establishments for epizootic haematopoietic necrosis (EHN) in aquatic animals a
| a The sampling of fish for laboratory examination must be carried out whenever the water temperature is between 11 and 20 °C. The water temperature requirement must also apply to health inspections. In establishments where the water temperature does not reach 11 °C during the year, sampling and health visits must be carried out when the water temperature is at its highest level. | ||||
| b Samples from broodstock must not include gonadal fluids, milt or ova as there is no evidence of EHN causing reproductive tract infection. | ||||
| Type of establishment | Number of health inspections per year (2 years) | Number of samplings per year (2 years) | Number of fish in the sample | |
|---|---|---|---|---|
| Number of growing fish | Number of brood stock fishb | |||
| (a) Establishments with broodstock | 2 | 2 | 150 (first and second inspection) | 150 (first or second inspection) |
| (b) Establishments with broodstock only | 2 | 1 | 0 | 150b (first or second inspection) |
| (c) Establishments without broodstock | 2 | 2 | 150 (first and second inspection) | 0 |
| Maximum number of fish per pool: 10 | ||||
| Category A disease | Minimum periods of surveillance |
|---|---|
| Infection with Mikrocytos mackini | 3 years |
| Infection with Perkinsus marinus | 3 years |
| Infection with Taura syndrome virus | 2 years |
| Infection with Yellow head syndrome virus | 2 years |
| Epizootic haematopoietic necrosis | 2 years |
When the period of surveillance has elapsed and there has been no new detection of infection with the relevant category A disease, the measures in the surveillance zone must be lifted as provided for in Article 101 of this Regulation.