Terrestrial Animal Health Code |
Infectious bovine rhinotracheitis/ infectious pustular vulvovaginitis
General provisions
For the purposes of the Terrestrial Code,
the incubation period for
infectious bovine rhinotracheitis/infectious pustular vulvovaginitis
(IBR/IPV) shall be 21 days.
Standards for diagnostic tests and vaccines are described in the Terrestrial Manual.
Country or zone free from IBR/IPV
Qualification
To qualify as free from IBR/IPV, a country or zone should
satisfy the following requirements:
Maintenance of free status
For a country or zone to
maintain its status free from IBR/IPV:
a serological survey should
be carried out annually on a random sample of the cattle population
of the country or zone sufficient
to provide a 99 % level of confidence of detecting IBR/IPV if it
is present at a prevalence rate exceeding 0.2 % of the herds;
all imported bovines comply with Article 11.10.4.;
all imported bovine semen and embryos/ova fulfil the requirements referred to in Articles 11.10.6. or 11.10.7., and in Article 11.10.8., respectively.
Herd free from IBR/IPV
Qualification
To qualify as free from IBR/IPV, a herd of cattle should satisfy the following requirements:
all the animals in the herd have been subjected to a diagnostic test for IBR/IPV on a blood sample on two occasions with negative results, at an interval of not less than 2 months and not more than 12 months; or
if the herd contains only dairy cattle of which at least a quarter are lactating cows, each of the latter has been subjected to a diagnostic test on individual milk samples carried out on three occasions at intervals of two months with negative results;
animals introduced into the herd after the first tests referred to in point a) or point b) as relevant have been:
kept in an IBR/IPV free herd; or
placed in isolation for a period of 30 days, and during this period have been subjected to a diagnostic test for IBR/IPV on a blood sample on two occasions with negative results, at an interval of not less than 21 days;
all bovine semen and embryos/ova introduced into the herd after the first tests referred to in point a) or point b) as relevant have fulfilled the conditions provided in Articles 11.10.6. or 11.10.7. and in Article 11.10.8., respectively.
Maintenance of free status
For a herd to maintain its status free from IBR/IPV, it should be subjected to the following tests with negative results:
EITHER
diagnostic tests for IBR/IPV on blood samples for all the animals repeated at maximum intervals of 12 months; in herds composed entirely of fattening animals, blood sampling may be limited to animals sent for slaughter;
OR
diagnostic tests on individual milk samples from all lactating cows repeated at intervals of six months; Veterinary Authorities applying an IBR/IPV eradication programme may extend these intervals (under study) if more than 98 % of herds have been free from the disease for at least three years; and
diagnostic tests on blood samples for IBR/IPV of all breeding bulls repeated at maximum intervals of 12 months;
AND
diagnostic tests on blood samples for IBR/IPV of all cattle having aborted after more than three months of gestation.
Animals introduced into the herd should satisfy the conditions provided in point 1c) above, and semen and embryos/ova used in the herd should satisfy the conditions provided in Articles 11.10.6. or 11.10.7. and in Article 11.10.8., respectively.
Recommendations for the importation of cattle destined for herds free from IBR/IPV
Veterinary Authorities of importing countries should require the presentation of an international veterinary certificate attesting that the animals:
showed no clinical sign of IBR/IPV on the day of shipment;
come from an IBR/IPV free herd; or
were kept in a quarantine station for the 30 days prior to shipment and were subjected to a diagnostic test for IBR/IPV on a blood sample on two occasions with negative results, at an interval of not less than 21 days.
Recommendations for the importation of cattle intended for herds not qualified as free from IBR/IPV
Veterinary Authorities of importing countries should require the presentation of an international veterinary certificate attesting that the animals:
showed no clinical sign of IBR/IPV on the day of shipment;
were vaccinated with an inactivated virus vaccine not less than one month and not more than six months prior to shipment.
Recommendations for the importation of fresh semen
Veterinary Authorities of importing countries should require the presentation of an international veterinary certificate attesting that:
the donor animals were kept in an IBR/IPV free herd at the time of collection of the semen;
the semen was collected, processed and stored in accordance with Chapters 4.5. and 4.6.
Recommendations for the importation of frozen semen
Veterinary Authorities of importing countries should require the presentation of an international veterinary certificate attesting that:
the donor animals were kept in an IBR/IPV free herd at the time of collection of the semen; or
the donor animals were held in isolation during the period of collection and for the 30 days following collection and were subjected to a diagnostic test for IBR/IPV on a blood sample taken at least 21 days after collection of the semen, with negative results; or
if the serological status of the bull is unknown or if the bull is serologically positive, an aliquot of each semen collection was subjected to a virus isolation test or PCR, performed in accordance with the Terrestrial Manual, with negative results; and
the semen was collected, processed and stored in accordance with Chapters 4.5. and 4.6.
Recommendations for the importation of embryos/ova
Veterinary Authorities of importing countries should require the presentation of an international veterinary certificate attesting that the embryos/ova were collected, processed and stored in accordance with Chapters 4.7., 4.8. and 4.9., as relevant.
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