Page 111 - JRT Magazine - 2023 Issue 2
P. 111
to the virus, then no other action is necessary. If, in
contrast, none of the dogs have an antibody titer
(which would be a rare situation), one strategy might
be to try to continue to keep the kennel CVH1-free
(which would be a challenge), or to vaccinate all the
dogs against the virus (CHV1 vaccine is not licensed
in the USA). In the majority of kennels, however, the
tests will show that there are both dogs with and
without titers, with younger dogs usually being the about
ones without a CHV1 titer. In those situations, the Catharina Linde Forsberg
unprotected dogs should be vaccinated against CHV1
(if the vaccine is available in that country) at the time
of breeding and again two weeks before whelping.
All new introductions should be kept isolated from the DVM, PhD, Dipl ECAR, Professor em. of
other dogs and tested before they are allowed into the Small Animal Reproduction, Specialist in
kennel. Dog and Cat Reproduction.
In a kennel with acute problems from CHV1, a Catharina is a founding member and
veterinarian might be able to provide so called hyper- Honorary Member of the European Society
immune serum. This is serum collected from a dog for Small Animal Reproduction (EVSSAR)
with a high antibody titer against CHV1. Such serum and the Swedish Society for Small Animal
can be stored in a freezer, to be used in newborn Reproduction.
puppies if the bitch does not have enough antibodies.
Some breeders in the USA regularly use commercially Catharina Linde Forsberg has been involved
available fresh frozen plasma (FFP) orally for newborn with research into canine reproduction
puppies within the first 24 hours to ensure they since 1973. Her research results on AI
receive high levels of a variety of protective antibodies, and preservation of dog semen are today
regardless of the bitch’s colostrum. used with great success on a global basis
and in assisted reproduction of the dog.
A vaccine against CHV1 is available in Europe, and Catharina’s knowledge about canine
some breeders choose to vaccinate even when they semen freezing is extremely valuable and
have no reason to expect problems. The vaccine informative. Catharina has published a
should be given in connection with mating or early wonderful and complete review of canine
in pregnancy and again as a booster 2 weeks before semen freezing in the IVIS textbook on
expected whelping. The effect is short, and the small animal reproduction. By many this
vaccinations should, therefore, be repeated when the book is referred to as a ‘bible’ it is an
bitch is mated again. Studies of the protective effects informative book that appeals to people
of this vaccine published so far are not entirely clear. who are wanting to learn the basic
knowledge about dealing with semen
A CHV1 vaccine is not approved in the USA and so freezing and transportation.
breeders depend on naturally developed immunity.
Bitches that had a show or performance career prior Catharina is also a successful Beagle
to being bred rarely have problems because they have Breeder since 1968.
antibodies from prior exposure even if they showed F.C.I Judge and Field trial judge.
minimal to no clinical signs at the time. Bitches with
CHV1-infected litters are usually those who had few e-mail: canirephb@gmail.com
to no interactions with outside dogs before being Website: www.canirep.com
bred but then are exposed during the later stage of
gestation.
A Worldwide Magazine for the Jack Russell Terrier / Russell Terrier • Issue 2/2023 | 111
