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SAPUVETNET. MENINGITIS STREPTOCOCICA PORCINA; ANTIBIOTIC RESISTANCE FROM PIGS PUBLIC HEALTH INVOLVEMENTS. Additional material: Manual on DISEASE OUTBREAK INVESTIGATION Manual on PRUDENT USE OF ANTIBIOTICS. SAPUVETNET. - PowerPoint PPT PresentationTRANSCRIPT
MENINGITIS STREPTOCOCICA PORCINA; ANTIBIOTIC
RESISTANCE FROM PIGS
PUBLIC HEALTH INVOLVEMENTS
Additional material:
Manual on DISEASE OUTBREAK INVESTIGATION
Manual on PRUDENT USE OF ANTIBIOTICS
The case: a little region of a developing country where stock breeding is trying to develop to improve the economy of the
regionFirst case of disease in humans appeared on
15th June of 2005
In the next week, 12 cases were described:- Slight cutaneous symptoms on hands and arms- Inflammation and red skin in these zones. - Little grazes
On the 21th June, one person died with septicaemia, toxic shock, meningitis and
subcutaneous haemorrhage
• A bacterial cause was suspected, so:
• A treatment with broad spectrum penicillinpenicillin was carried out
• It wasn’t effective and three days later the treatment was changedwas changed to a
quinolonequinolone
• It wasn’t effective too, so doctors started to look for a antibiotic of third antibiotic of third
generationgeneration
• While this was happening, another another person diedperson died. He also had a septicaemiasepticaemia
As a Veterinary Public Health (VPH) expert
do you think they (doctors) have acted in a right way to deal with the human
cases?
In case they did notIn case they did not:Which mistakes do you think they made?
What do you think they should do?
The microbiological investigation of the two dead patients detected the presence of
Streptococcus suis. Moreover this micro-organism was resistant to almost all
antibiotic assessed
• As public concern was growing, a working team involving doctors, veterinarians and politicians was
created. The veterinarians suggested to study if this micro organism had an
animal origin
How would you carry out the STUDY OF THE DISEASE?
Which aspects do you think would be important to study?
The investigation showed that:
• Before 15th June, some more 20 (minor) cases have came up during the year. Those people got
better in 12-15 days
• There have been higher mortality than normal in two pig farms during the last months. The pigs died with meningitis. No cause was found for
these deaths, but it was thought that it happened because of over-crowding and very
humid and hot weather
• One of the dead patients worked in the pig farm and the other worked in the
slaughterhouse. Most of the affected people had taken part in domestic pig slaughtering
(which is a tradition in the area) Other affected people were
slaughterhouse workers and the others were close relatives of the affected people
In the last years some people had been sick with similar but less severe symptoms, and
cases in pigs had been also described
The investigation showed that:
What is your conclusion with the information so far available?
The study in pigs of the region showed that Streptococcus suis type 2 was detected
in the 70% of the farms
• This bacteria has the same serotype and genotype as the bacteria isolated from the dead
people
• Also the same antibiotic resistance patterns were showed
• All these strains were multi-resistant.
• Pig farms related people were also investigated and the bacteria was isolated in 40% of them.
Do you still held your previous conclusion with the available
information?
Could you now think of a new / different conclusion?
The study at the pig farms showed that:
• Most of the famers didn’t have veterinary advice
• There were a constant movement and mixing of animals amongst the farms
• The farmers gave antibiotics to animals in order to prevent diseases:
– Antibiotics are given with food and half of the standard dosis
– During the last two years, at the farms a mix of two penicillins and a tetracicline had been used
…Cont.
• The farms were cleaned with running water once a month
• When a animal died, the carcases were disposed of (thrown away) without any treatment
With all these information:
Do you consider that these practices are appropriate?
Cont.
How would you suggest to solve this problem both in animals and
humans?Case study developed by the SAPUVETNET II member – University
of Zaragoza, Fac. Veterinary Medicine (contact: Carmelo Ortega/ola Gimeno [email protected])
Do you think these practices are related with Public Health problems or may have something to do with it in future? In that case, explain which practices, why and how