Why is there no effective commercial vaccine against Streptococcus suis?
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In this third article, we want to to talk about a common guest in the nurseries: Streptococcus suis, the causative agent of clinical pictures that can include meningitis, arthritis and sudden deaths.
PRRSV favours the appearance of secondary infections like the one caused by S. suis due to the impairment of the alveolar macrophages cleaning functions.
Pathogens that are transmitted mostly through direct, pig to pig, contact are generally contained with today’s biosecurity programs and pig flow strategies. However, pathogens using multiple routes of transmission seem to evade standard biosecurity programs.
The abattoir is a useful endpoint to collect data on herd health status and a valuable tool for monitoring the effect of disease control measures.
PRRSV by itself may induce mild-to-severe respiratory disease but rarely results in mortality.
Currently, the human risk factors associated with S. suis infection are: 1) Eating raw/undercooked pork meat, 2) Being a farm worker with hog contact or 3) Butchers. To date, there is no evidence of human-to-human transmission of S. suis.