VIRKON® S disinfectant
AT THE HEART OF YOUR ON FARM BIOSECURITY.
Investments have been made in international product
registrations. As a result, DuPont has extensive data file
evidence on Virkon® S demonstrating efficacy against more
than 60 strains of virus in 19 viral families; over 400 strains
of bacteria and over 60 strains of fungi, all at a variety of
contact times, temperatures and organic challenge levels.
You too can benefit from this wealth of experience by putting
Virkon® S disinfectant at the heart of your on farm biosecurity.
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the science to kill pathogens
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viewed by contrasting the germ-free bird
versus those exposed to varying microbial-protozoa loads. Lev and Forbes (1959) were
the first to report that chickens reared in
axenic (germ-free) environments grew
more than 10% faster than those exposed
to conventional flora.
Coccidiosis, mediated by protozoa
of the genus Eimeria, is among the
major disease challenges facing the
poultry industries. Though a variety of
therapeutics is available to minimize
coccidiosis incidence and severity, birds
will normally develop immunity during
the production cycle. Vaccination at
the time of hatching speeds immunity,
and immunity timing can be critical to
performance as late challenges have
higher costs for birds lacking immunity. Coccidiosis mediated lesions are
associated with elevated maintenance
energy need, malabsorption, depressed
appetite, reduced BWT and worsened
ECV and FCR.
Reductions in bird performance
(Figure 2) due to coccidiosis intestinal
lesions are also related to bird energy
metabolism. Maintenance increases
(Figure 3) in proportion to metabolic
body size for the unchallenged lesion-0
birds as they mature. Bird maintenance
needs are elevated slightly for immunity development and markedly so for
coccidiosis, thereby impacting FCR
(Figure 4). Indeed, energy needed for
immunity development was just 5%
higher compared to 28% for coccidiosis. This cost becomes disproportionately elevated as birds age.
An additional cost of coccidiosis
is feed passage. Figure 5 displays
bird calories lost in the excreta with
the control birds averaging just 3.6%
loss while birds with full coccidiosis
averaged over a 50 Kcal additional
loss each day in excreta and reached
values exceeding 110 kcal per day with
age. Considering that the coccidiosis
period is thought to run about six days,
this would total 660 kcal loss in the