Salmonella cases drop after vaccination drive
London: Mass vaccination drives have brought about a sharp drop in salmonella cases since the late 1990s, according to the latest finding.
Salmonella, a food-borne pathogen, causes diarrhoea, vomiting, nausea, fever and abdominal pain. Currently six million cases are reported annually from the European Union alone, the bulk being accounted for by eggs, chicken, beef, pork, salad vegetables and dairy products.
Sarah O`Brien, professor of epidemiology and zoonoses, from the University of Liverpool Institute of Infection and Global Health, who led the study, attributes the sharp drop in salmonella cases to mass vaccination drives, reports the journal Clinical Infectious Diseases.
"We have seen a marked decline in the number of incidences of salmonella infection, shown by two significant studies conducted 10 years apart," O`Brien was quoted as saying in a Liverpool statement.
"The number of laboratory-confirmed cases of illness dropped from more than 18,000 in 1993 to just 459 in 2010," she added.
Between 1981 and 1991, the number of salmonella cases rose by 170 percent in Britain, driven primarily by an epidemic of salmonella enteritidis which peaked in 1993.
A raft of control measures were introduced into the poultry industry including movement restrictions, compulsory slaughter and disinfection procedures, as well as a voluntary industry-led vaccination scheme that began in breeding flocks in 1994 and in laying flocks in 1998.
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