Lohmann vaccine protects layers against
of Article: http://www.worldpoultry.net/news/lohmann-vaccine-protects-layers-against-salmonella-4229.html
24 Aug 2009
Lohmann Animal Health's AviProŽ
MeganŽ Egg is a live attenuated Salmonella vaccine specifically developed
to protect egg layers against Salmonella Enteritidis infection.
The vaccine reduces the
colonization of the intestinal tract and ceca by Salmonella Enteritidis,
and is the only commercial live Salmonella vaccine with a claim to protect
ovaries and oviducts, says the company.
AviProŽ MeganŽ Egg is for
use in pullets and laying hens to protect against infection from Salmonella
Enteritidis that is known to contaminate eggs. Pullets generally receive 3
vaccinations during the growing period, providing protection against Salmonella Enteritidis during
the laying cycle. AviProŽ MeganŽ Egg is proven to protect hens during molt.
It can also be used in a comprehensive Salmonella protection programme in
association with inactivated, autogenous Salmonella vaccines, which
stimulate the production of long-lasting circulating antibodies.
The vaccine, which is
administered through coarse spray vaccination at 2, 4 and 16 weeks of age,
is derived from a naturally-occurring Salmonella
Typhimurium that has been genetically modified to impair 2
genes that are important for normal growth and metabolism. The
modifications to the cya and crp genes result in an organism that is
completely distinct from Salmonella species. AviProŽ MeganŽ Egg does not
interfere with Salmonella monitoring programs. When cultures are examined
using a rapid identification system, the results show a biochemical profile
that is considerably distinct from other Salmonella.