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Dr. Ian M. Gould  Medical Microbiology  Aberdeen Royal Infirmary Empirical Antibiotic Therapy; a Need for Innovation “ At least the waiting lists are improving - I only had to wait one week to get MRSA”
IF YOU DON’T LOOK PROPERLY , YOU WON’T SEE IT
How well do you know your enemy:  How long have bacteria existed on our planet? ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Enemy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Stromatolites are the fossalized remains of a  colony or mat of Cyanobacteria that normally exhibits either a domed or a column-like shape.  The oldest known stromatolites occur in rocks in Warrawoona Group of Western Australia and are some 3.4 to 3.5 billion years old.  Homo sapiens lived from 250,000 years ago.
 
 
 
[object Object],[object Object],[object Object]
Paradox 1 ,[object Object]
“ Haven’t you heard  – we’ve got MRSA sweeping the hospital”
MRSA Infection Control Just the hands Frickerson!
Environmental contamination 20-50 % antibiotic use in humans not necessary 40-80% antibiotics used for animals questionable value
 
 
 
Integron MULTIPLE ANTIBIOTIC RESISTANT DETERMINANT GENE CASSETTES conserved  DNA 4FQ integrase tet macrolide  -lactam promoter Amino- glycoside conserved  DNA
 
Paradox 3 ,[object Object]
Deaths from HAI, USA ,[object Object],[object Object],[object Object]
Jan 96 Jan 97 Jan 98 Jan 99 Jan 00 % MRSA Sum of lagged antimicrobial series % MRSA Total ab. Consumption: DDD/1000 bed days Relationship between % MRSA and antibiotic use.  (3 rd  GC, FQ, MAC) Emerg. Inf. Dis 2004, 1432 3 rd  GC lags = 4 – 7 months FQ lags = 4 & 5 months MAC lags = 1 – 3 months
 
CID 2008:46 (Suppl 1) S25 MA of Risk of C diff v Antibiotic Exposure
HPS Reported bacteraemia
The Antibiotic Resistance Spiral Adapted from: J. Carlet. resistance RESISTANCE CONCERN SELECTION BROAD-SPECTRUM EMPIRIC THERAPY cross- transmission dosage duration new antibiotics (promotion from pharmaceutical industry)
 
Current MDR Concerns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
ESBLs ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
 
Courtesy of D Livermore, HPA
Carbapenemases ,[object Object],[object Object],[object Object],[object Object]
Pseudomonas aeruginosa: proportion of invasive isolates resistant to  carbapenems in 2006
McGowan & Tenover ‘04 Nature Reviews Microbiology  2 251
SPAIN – EARSS data 2007
 
Incidence of inadequate antibiotic therapy in hospitals N=147 N =1255 N = 34 n = 146 N = 27 Bloodstream infection Nosocomial/Ventialor-associated pneumonia Ibrahim et al  Chest 2000; 118:146-155 Leibovici et al  J Intern Med  1998; 244:379-386 Luna et al  Chest 1997; 111:676-685. Alvarez-Lerma Inten Care Med 1996; 22:387-394 Rello et al  Am J Respir Crit Care 1997; 156:196-200
Bloodstream infections Nosocomial/Ventilator-associated pneumonia Influence of inadequate antibiotic therapy on mortality Ibrahim et al  Chest 2000; 118:146-155 Leibovici et al  J Intern Med  1998; 244:379-386 Luna et al  Chest 1997; 111:676-685. Alvarez-Lerma Inten Care Med 1996; 22:387-394 Rello et al  Am J Respir Crit Care 1997; 156:196-200
For Septic shock: Each hour delay in antibiotic initiation over the  first 6 hours has been shown to be associated with an average decrease in survival of 7.6% Adapted from Kumar A, Critical Care medicine 2006 Vol.34, No 6.
 
 
ViResiST
Conclusions ,[object Object],[object Object],[object Object]
Thanks

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La resistencia bacteriana, necesidad de innovación. dr. ian m. gould

  • 1. Dr. Ian M. Gould Medical Microbiology Aberdeen Royal Infirmary Empirical Antibiotic Therapy; a Need for Innovation “ At least the waiting lists are improving - I only had to wait one week to get MRSA”
  • 2. IF YOU DON’T LOOK PROPERLY , YOU WON’T SEE IT
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  • 10. “ Haven’t you heard – we’ve got MRSA sweeping the hospital”
  • 11. MRSA Infection Control Just the hands Frickerson!
  • 12. Environmental contamination 20-50 % antibiotic use in humans not necessary 40-80% antibiotics used for animals questionable value
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  • 16. Integron MULTIPLE ANTIBIOTIC RESISTANT DETERMINANT GENE CASSETTES conserved DNA 4FQ integrase tet macrolide  -lactam promoter Amino- glycoside conserved DNA
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  • 20. Jan 96 Jan 97 Jan 98 Jan 99 Jan 00 % MRSA Sum of lagged antimicrobial series % MRSA Total ab. Consumption: DDD/1000 bed days Relationship between % MRSA and antibiotic use. (3 rd GC, FQ, MAC) Emerg. Inf. Dis 2004, 1432 3 rd GC lags = 4 – 7 months FQ lags = 4 & 5 months MAC lags = 1 – 3 months
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  • 22. CID 2008:46 (Suppl 1) S25 MA of Risk of C diff v Antibiotic Exposure
  • 24. The Antibiotic Resistance Spiral Adapted from: J. Carlet. resistance RESISTANCE CONCERN SELECTION BROAD-SPECTRUM EMPIRIC THERAPY cross- transmission dosage duration new antibiotics (promotion from pharmaceutical industry)
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  • 32. Courtesy of D Livermore, HPA
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  • 34. Pseudomonas aeruginosa: proportion of invasive isolates resistant to carbapenems in 2006
  • 35. McGowan & Tenover ‘04 Nature Reviews Microbiology 2 251
  • 36. SPAIN – EARSS data 2007
  • 37.  
  • 38. Incidence of inadequate antibiotic therapy in hospitals N=147 N =1255 N = 34 n = 146 N = 27 Bloodstream infection Nosocomial/Ventialor-associated pneumonia Ibrahim et al Chest 2000; 118:146-155 Leibovici et al J Intern Med 1998; 244:379-386 Luna et al Chest 1997; 111:676-685. Alvarez-Lerma Inten Care Med 1996; 22:387-394 Rello et al Am J Respir Crit Care 1997; 156:196-200
  • 39. Bloodstream infections Nosocomial/Ventilator-associated pneumonia Influence of inadequate antibiotic therapy on mortality Ibrahim et al Chest 2000; 118:146-155 Leibovici et al J Intern Med 1998; 244:379-386 Luna et al Chest 1997; 111:676-685. Alvarez-Lerma Inten Care Med 1996; 22:387-394 Rello et al Am J Respir Crit Care 1997; 156:196-200
  • 40. For Septic shock: Each hour delay in antibiotic initiation over the first 6 hours has been shown to be associated with an average decrease in survival of 7.6% Adapted from Kumar A, Critical Care medicine 2006 Vol.34, No 6.
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Editor's Notes

  1. The final point I want to briefly mention is that we have looked at the relationships between prevalence of the ALERT organisms and antibiotic use.