PROVIDENCE: Prognosis and Virulence Determination of Capsule and Endotoxin During Klebsiella Spp. Ventilator-associated Pneumonias
Study Details
Study Description
Brief Summary
Ventilator-associated pneumonia is the leading cause of nosocomial infection in the ICU. The pathogens responsible are multiple, but enterobacteria constitute a major source of pathogens involved. Within this family, Klebsiella spp. and Escherichia coli are the two most frequent genera, with Klebsiella spp. often present in severe forms. The factors associated with the occurrence of Ventilator-associated pneumonia and its adverse course depend on host defenses and the virulence of the pathogen. The virulence of Klebsiella spp. depends on several structures, notably the presence of a capsule, the particularities of its lipopolysaccharide, its adhesins (type 3 fimbriae), its capacity to capture iron (siderophores). The objective of this work is to evaluate the role of these different virulence mechanisms in the evolution of Ventilator-associated pneumonia and the hospital prognosis.
| Condition or Disease | Intervention/Treatment | Phase |
|---|---|---|
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Study Design
Outcome Measures
Primary Outcome Measures
- Role of 2-hydroxymyristate within lipid A of lipopolysaccharide in the prognosis of mechanically ventilated pneumonia caused by Klebsiella spp. [Month 1]
This outcome corresponds to the prognostic value (prediction of clinical cure) of the studied virulence parameters (myristate hydroxylation, presence of fimbriae, expression of siderophores, expression of capsule) at D7 of effective antibiotic treatment, according to the virulence parameters of the pathogen, after adjustment on known prognostic factors. This value will be estimated by the adjusted HR, the improvement of the model fit, the number of patients who change classification (cured/not cured) after inclusion of this factor.
Secondary Outcome Measures
- Effect of other virulence factors on the evolution of ventilator-associated pneumonia [Month 1]
This outcome corresponds to the prognostic value (accuracy of recurrence of pulmonary infection under mechanical ventilation with the same germ (Klebsiella spp.) during the stay in intensive care.
Eligibility Criteria
Criteria
Inclusion Criteria:
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Patient whose age is ≥ 18 years
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Patient hospitalized in an intensive care unit
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Patient with ventilator-associated Klebsiella spp. pneumonia
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French-speaking patient
Exclusion Criteria:
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Patient with a severe psychiatric disorder
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Patient under guardianship or curatorship
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Patient deprived of liberty
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Patient under court protection
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Patient who objects to the use of his or her data for this research
Contacts and Locations
Locations
| Site | City | State | Country | Postal Code | |
|---|---|---|---|---|---|
| 1 | Groupe Hospitalier Paris Saint-Joseph | Paris | France | 75014 |
Sponsors and Collaborators
- Groupe Hospitalier Paris Saint Joseph
Investigators
- Principal Investigator: François BEAUSSIER, MD, Groupe Hospitalier Paris Saint Joseph
Study Documents (Full-Text)
None provided.More Information
Publications
- Berra L, Panigada M, De Marchi L, Greco G, Z -Xi Y, Baccarelli A, Pohlmann J, Costello KF, Appleton J, Mahar R, Lewandowski R, Ravitz L, Kolobow T. New approaches for the prevention of airway infection in ventilated patients. Lessons learned from laboratory animal studies at the National Institutes of Health. Minerva Anestesiol. 2003 May;69(5):342-7. Review.
- Bouadma L, Sonneville R, Garrouste-Orgeas M, Darmon M, Souweine B, Voiriot G, Kallel H, Schwebel C, Goldgran-Toledano D, Dumenil AS, Argaud L, Ruckly S, Jamali S, Planquette B, Adrie C, Lucet JC, Azoulay E, Timsit JF; OUTCOMEREA Study Group. Ventilator-Associated Events: Prevalence, Outcome, and Relationship With Ventilator-Associated Pneumonia. Crit Care Med. 2015 Sep;43(9):1798-806. doi: 10.1097/CCM.0000000000001091.
- Chastre J, Fagon JY. Ventilator-associated pneumonia. Am J Respir Crit Care Med. 2002 Apr 1;165(7):867-903. Review.
- Crnich CJ, Safdar N, Maki DG. The role of the intensive care unit environment in the pathogenesis and prevention of ventilator-associated pneumonia. Respir Care. 2005 Jun;50(6):813-36; discussion 836-8. Review.
- Damas P, Layios N, Seidel L, Nys M, Melin P, Ledoux D. Severity of ICU-acquired pneumonia according to infectious microorganisms. Intensive Care Med. 2011 Jul;37(7):1128-35. doi: 10.1007/s00134-011-2255-8. Epub 2011 May 26.
- Vincent JL, Rello J, Marshall J, Silva E, Anzueto A, Martin CD, Moreno R, Lipman J, Gomersall C, Sakr Y, Reinhart K; EPIC II Group of Investigators. International study of the prevalence and outcomes of infection in intensive care units. JAMA. 2009 Dec 2;302(21):2323-9. doi: 10.1001/jama.2009.1754.
- Wang Y, Eldridge N, Metersky ML, Verzier NR, Meehan TP, Pandolfi MM, Foody JM, Ho SY, Galusha D, Kliman RE, Sonnenfeld N, Krumholz HM, Battles J. National trends in patient safety for four common conditions, 2005-2011. N Engl J Med. 2014 Jan 23;370(4):341-51. doi: 10.1056/NEJMsa1300991.
- PROVIDENCE