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Citrex |
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The Truth
About
Salmonellosis
Controls
Treatment and prevention |
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Salmonellosis has been, throughout history, one of the most serious
problems challenging the expansion of the poultry industry worldwide.
Institutions like the National Poultry Improvement Plan (NPIP) in the USA
were created, among other goals, to control infections caused by
Salmonella. In most developed countries, host-adapted species of
Salmonella (S. pullorum and S. gallinarum) have been eradicated, but
other non-host-adapted species (S. enteritidis and S. typhymurium) still
represent a very serious public health problem. In developing countries,
both types of species, host-adapted and non-host-adapted, continue to
pose a threat to the health of poultry and humans who consume poultry
products. During the last decade, scientific publications report an increase
of more than 85% in the number of human infections caused by ST and
SE. As a result, producers are facing more pressure from the public and
the regulatory agencies controlling the management of eggs and chicken
meat. All this makes prevention and control of such infections a critical
issue.
Traditionally there have been different types of treatments, including the
use of prebiotics, competitive exclusion (probiotics), antimicrobial agents,
acidifiers (organic and inorganic acids), and the administration of live or
killed vaccines. Competitive exclusion has shown a consistent reduction
in intestinal colonization and further invasion of internal organs by several
Salmonella species. This method has been used worldwide and is
generally considered one of the most efficient. On the other hand,
inactivated vaccines represent a prevention method that helps decrease
susceptibility to infections. Frequently, vaccination plus probiotics are
used in combination, together with a strict biosecurity program to avoid or
reduce the possibility of any field challenge in the farms.
Antimicrobial agents have also been used extensively for many years.
They work well to control clinical symptoms during an outbreak, but as it
happens with mycoplasmosis, it is not possible to control infections
permanently with the use of such products.
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Usted necesita actualizar su Flash Player
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