Salmonella
Salmonella is a bacterium that can have devastating effects if an outbreak occurs on a dairy farm. It spreads through the faecal-oral route, with infected cows shedding the bacteria in their faeces, contaminating pasture that other cows then consume.
Symptoms and Impact:
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Diarrhoea: Infected cows typically exhibit profuse, watery diarrhoea.
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Milk Production: A significant decrease in milk production is common.
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Systemic Illness: Without treatment, Salmonella can lead to severe systemic illness and often death.
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Human Health Risk: Salmonella is also a concern due to its potential to spread to humans.
Vaccination:
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Annual Vaccination: Administering the vaccine annually prior to the risk period (e.g., calving) is highly effective in preventing outbreaks.
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Outbreak Response: Vaccination during an outbreak can help reduce its severity.
Additional Preventative Measures:
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Colostrum Management: Proper management of colostrum for calves to boost their immunity.
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Herd Management: Implementing strict herd management practices to minimize the risk of infection.
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Contact Reduction: Reducing contact with other animals to prevent the introduction and spread of Salmonella.