Chapter 11.5.

Infection with Perkinsus olseni

Article 11.5.1.

For the purposes of the Aquatic Code, infection with Perkinsus olseni means infection only with P. olseni.

Information on methods for diagnosis are provided in the Aquatic Manual.

Article 11.5.2.

The recommendations in this Chapter apply to: primarily venerid clams (Austrovenus stutchburyi, Venerupis pullastra, V. aurea, Ruditapes decussatus and R. philippinarum), abalone (Haliotis rubra, H. laevigata, H. Cyclobates and H. scalaris) and other species (Anadara trapezia, Barbatia novaezelandiae, Macomona liliana, Paphies australis, Crassostrea gigas and C. ariakensis). These recommendations also apply to any other susceptible species referred to in the Aquatic Manual when traded internationally.

Article 11.5.3.

1. When authorising the importation or transit of the following commodities, the Competent Authorities should not require any P. olseni related conditions, regardless of the P. olseni status of the exporting country, zone or compartment:

   1. For the species referred to in Article 11.5.2. intended for any purpose:

      1. commercially sterile canned or other heat treated products.

   2. The following commodities destined for human consumption from the species referred to in Article 11.5.2. which have been prepared in such a way as to minimise the likelihood of alternative uses:

      1. chemically preserved products (e.g. smoked, salted, pickled, marinated);

      2. non commercially sterile products (e.g. ready prepared meals) that have been heat treated in a manner to ensure the inactivation of the parasite.

   For the commodities referred to in point 1b), OIE Members may wish to consider introducing internal measures to address the risks associated with the commodity being used for any purpose other than for human consumption.

2. When authorising the importation or transit of commodities of a species referred to in Article 11.5.2., other than commodities referred to in point 1 of Article 11.5.3., the Competent Authorities should require the conditions prescribed in Articles 11.5.7. to 11.5.11. relevant to the P. olseni status of the exporting country, zone or compartment.

3. When considering the importation or transit from an exporting country, zone or compartment not declared free of P. olseni of a commodity from bivalve and gastropod species not covered in Article 11.5.2., the Competent Authorities should conduct an analysis of the risk of introduction, establishment and spread of P. olseni, and the potential consequences, associated with the importation of the commodity prior to a decision. The exporting country should be informed of the outcome of this assessment.

Article 11.5.4.

A country may make a self-declaration of freedom from P. olseni if it meets the conditions in points 1, 2 or 3 below.

If a country shares a zone with one or more other countries, it can only make a self-declaration of freedom from P. olseni if all the areas covered by the shared water are declared P. olseni free zones (see Article 11.5.5.).

1. A country where the susceptible species referred to in Article 11.5.2. are present but there has been no observed occurrence of the disease for at least the past 10 years despite conditions – in all areas where the species are present – that are conducive to its clinical expression, as described in the corresponding chapter of the Aquatic Manual, may make a self-declaration of freedom from P. olseni when basic biosecurity conditions have been continuously met in the country for at least the past 3 years and infection with P. olseni is not known to be established in wild populations.

OR

2. A country where the last known clinical occurrence was within the past 10 years or where the infection status prior to targeted surveillance was unknown (e.g. because of the absence of conditions conducive to clinical expression as described in the corresponding chapter of the Aquatic Manual) may make a self-declaration of freedom from P. olseni when:

   1. basic biosecurity conditions have been continuously met for at least the past 3 years; and

   2. targeted surveillance, as described in Chapter 1.4. of the Aquatic Code, has been in place for at least the past 3 years without detection of P. olseni.

OR

3. A country that has previously made a self-declaration of freedom from P. olseni but in which the disease is subsequently detected may not make a self-declaration of freedom from P. olseni again until the following conditions have been met:

   1. on detection of the disease, the affected area was declared an infected zone and a buffer zone was established; and

   2. infected populations have been destroyed or removed from the infected zone by means that minimise the risk of further spread of the disease, and the appropriate disinfection procedures (see Aquatic Manual) have been completed; and

   3. targeted surveillance, as described in Chapter 1.4. of the Aquatic Code, has been in place for at least the past 3 years without detection of P. olseni; and

   4. previously existing basic biosecurity conditions have been reviewed and modified as necessary and have continuously been in place for at least the past 3 years.

   In the meantime, part of the non-affected area may be declared a free zone provided that such part meets the conditions in point 2 of Article 11.5.5.

Article 11.5.5.

A zone or compartment free from P. olseni may be established within the territory of one or more countries of infected or unknown status for infection with P. olseni and declared free by the Competent Authority(ies) of the country(ies) concerned if the zone or compartment meets the conditions referred to in points 1, 2 or 3 below.

If a zone or compartment extends over more than one country, it can only be declared a P. olseni free zone or compartment if the conditions outlined below apply to all areas of the zone or compartment.

1. In a country of unknown status for P. olseni, a zone or compartment where the susceptible species referred to in Article 11.5.2. are present but there has been no observed occurrence of the disease for at least the past 10 years despite conditions – in all areas where the species are present – that are conducive to its clinical expression, as described in the corresponding chapter of the Aquatic Manual, may be declared free from P. olseni when basic biosecurity conditions have been continuously met in the zone or compartment for at least the past 3 years and infection with P. olseni is not known to be established in wild populations.

OR

2. A zone or compartment where the last known clinical occurrence was within the past 10 years or where the infection status prior to targeted surveillance was unknown (e.g. because of the absence of conditions conducive to clinical expression as described in the corresponding chapter of the Aquatic Manual) may be declared free from P. olseni when:

   1. basic biosecurity conditions have been continuously met for at least the past 3 years; and

   2. targeted surveillance, as described in Chapter 1.4. of the Aquatic Code, has been in place for at least the past 3 years without detection of P. olseni.

OR

3. A zone previously declared free from P. olseni but in which the disease is detected may not be declared free from P. olseni again until the following conditions have been met:

   1. on detection of the disease, the affected area was declared an infected zone and a buffer zone was established; and

   2. infected populations have been destroyed or removed from the infected zone by means that minimise the risk of further spread of the disease, and the appropriate disinfection procedures (see Aquatic Manual) have been completed; and

   3. targeted surveillance, as described in Chapter 1.4. of the Aquatic Code, has been in place for at least the past 3 years without detection of P. olseni; and

   4. previously existing basic biosecurity conditions have been reviewed and modified as necessary and have continuously been in place for at least the past 3 years.

Article 11.5.6.

A country, zone or compartment that is declared free from P. olseni following the provisions of point 1 of Articles 11.5.4. or 11.5.5. (as relevant) may maintain its status as P. olseni free provided that basic biosecurity conditions are continuously maintained.

A country, zone or compartment that is declared free from P. olseni following the provisions of point 2 of Articles 11.5.4. or 11.5.5. (as relevant) may discontinue targeted surveillance and maintain its status as P. olseni free provided that conditions that are conducive to clinical expression of infection with P. olseni, as described in the corresponding chapter of the Aquatic Manual, exist and basic biosecurity conditions are continuously maintained.

However, for declared free zones or compartments in infected countries and in all cases where conditions are not conducive to clinical expression of infection with P. olseni, targeted surveillance needs to be continued at a level determined by the Competent Authority on the basis of the likelihood of infection.

Article 11.5.7.

When importing live aquatic animals of species referred to in Article 11.5.2. from a country, zone or compartment declared free from P. olseni, the Competent Authority of the importing country should require an international aquatic animal health certificate issued by the Competent Authority of the exporting country or a certifying official approved by the importing country.

This certificate must certify, on the basis of the procedures described in Articles 11.5.4. or 11.5.5. (as applicable), whether the place of production of the aquatic animal is a country, zone or compartment declared free from P. olseni.

The certificate should be in accordance with the Model Certificate in Chapter 5.10.

This Article does not apply to commodities referred to in point 1 of Article 11.5.3.

Article 11.5.8.

When importing, for aquaculture, live aquatic animals of species referred to in Article 11.5.2. from a country, zone or compartment not declared free from P. olseni, the Competent Authority of the importing country should assess the risk and apply risk mitigation measures such as:

1. the direct delivery into and holding of the consignment in quarantine facilities;

2. the continuous isolation of the imported aquatic animals from the local environment;

3. the treatment of all effluent and waste material from the processing in a manner that ensures inactivation of P. olseni.

This Article does not apply to commodities referred to in point 1 of Article 11.5.3.

Article 11.5.9.

When importing, for processing for human consumption, live aquatic animals of species referred to in Article 11.5.2. from a country, zone or compartment not declared free from P. olseni, the Competent Authority of the importing country should require that:

1. the consignment be delivered directly to and held in quarantine facilities until processing and/or consumption; and

2. all effluent and waste material from the processing be treated in a manner that ensures inactivation of P. olseni.

This Article does not apply to commodities referred to in point 1 of Article 11.5.3.

Article 11.5.10.

When importing aquatic animal products of species referred to in Article 11.5.2. from a country, zone or compartment declared free from P. olseni, the Competent Authority of the importing country should require that the consignment be accompanied by an international aquatic animal health certificate issued by the Competent Authority of the exporting country or a certifying official approved by the importing country.

This certificate must certify, on the basis of the procedures described in Articles 11.5.4. or 11.5.5. (as applicable), whether or not the place of production of the consignment is a country, zone or compartment declared free from P. olseni.

The certificate should be in accordance with the Model Certificate in Chapter 5.10.

This Article does not apply to commodities referred to in point 1 of Article 11.5.3.

Article 11.5.11.

When importing aquatic animal products of species referred to in Article 11.5.2. from a country, zone or compartment not declared free from P. olseni, the Competent Authority of the importing country should assess the risk and apply appropriate risk mitigation measures such as:

1. the direct delivery into and holding of the consignment in biosecure/quarantine facilities for processing to one of the products referred to in point 1 of Article 11.5.3. or other products authorised by the Competent Authority;

2. the treatment of all effluent and waste material from the processing in a manner that ensures inactivation of P. olseni.

This Article does not apply to commodities referred to in point 1 of Article 11.5.3.