Page 2 of articles about streptococcus in Articles

Why is there no effective commercial vaccine against Streptococcus suis?

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.

At least 25% of the pigs from 2 to 3 weeks old were reported to be lame, some so severe that they lay in the arcs shaking and unable to stand.

An erythema multiforme (EM) was noticed in the majority (90%) of breeding stock, associated with respiratory problems and without mortality.

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.

In reproductive disease, submission of several whole affected litters is advisable to provide material for diagnosis of PRRSV and other diseases causing reproductive or neonatal problems.

You might also say that there are a variety of conditions which occur to the skin because it is a limiting membrane surrounding the pig’s organs.

In the diagnosis of nervous conditions it is difficult to establish initially, whether the problems lie in the bones, joints, muscles, or tendons or nerves. We should rule out anatomical or pathological problems in the former four systems before we assume we are dealing with nervous system problems.

H. parasuis is a gram-negative bacillus of small size, which belongs to the Pasteurellaceae family. The group characterized by fibrinous polyserositis and fibrinous arthritis became known as Glässer’s disease.

Wild animals which may spread infection between farms include wild pigs, birds, flies, rats and mice.

Pathogens which are highly infectious and only require small doses to establish infection in susceptible pigs and/or those which are able to survive environmentally for relatively long periods can be spread from farm to farm as fomites

There are consistent strains of Streptococcus suis usually types 1 and 2 across Europe but the other strains vary from country to country.