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Query: UMLS:C0032285 (pneumonia)
 54,520 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Methicillin resistant Staphylococcus aureus (MRSA) is a major nosocomial pathogen that causes severe morbidity and mortality worldwide. MRSA strains are endemic in many American and European hospitals and account for 29%-35% of all clinical isolates. Recent studies have documented the increased costs associated with MRSA infection, as well as the importance of colonisation pressure. Surveillance strategies have been proposed especially in high risk areas such as the intensive care unit. Pneumonia and bacteraemia account for the majority of MRSA serious clinical infections, but intra-abdominal infections, osteomyelitis, toxic shock syndrome, food poisoning, and deep tissue infections are also important clinical diseases. The traditional antibiotic therapy for MRSA is a glycopeptide, vancomycin. New antibiotics have been recently released that add to the armamentarium for therapy against MRSA and include linezolid, and quinupristin/dalfopristin, but cost, side effects, and resistance may limit their long term usefulness.
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PMID:Methicillin resistant Staphylococcus aureus (MRSA) in the intensive care unit. 1215 52

To characterize the clinical and bacteriologic characteristics of community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) infections, we reviewed 14 cases that were diagnosed in previously healthy patients during an 18-month period in France. Eleven patients had skin or soft-tissue infections. Two patients died of CA-MRSA necrotizing pneumonia. A case of pleurisy occurred in a child who acquired CA-MRSA from his mother, who had a breast abscess. The Panton-Valentine leukocidin genes and the lukE-lukD leukocidin genes were detected in all 14 isolates. The clonal origin of all of the isolates was demonstrated on the basis of their pulsotypes and antibiotic resistance profiles. All isolates had an agr3 allele. The combination of the Panton-Valentine leukocidin determinant (which encodes a virulence factor for primary skin infection and pneumonia) with the mecA gene (which confers antibiotic resistance and epidemicity) appears to have created a superadapted S. aureus strain that is spreading in the community.
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PMID:Community-acquired methicillin-resistant Staphylococcus aureus infections in France: emergence of a single clone that produces Panton-Valentine leukocidin. 1222 18

A 68-year-old woman with Parkinson's disease (PD) was admitted due to aspiration pneumonia. The symptoms improved partly by administration of antimicrobial agents and a steroid-pulse treatment, but she suffered repeated MRSA pneumonia, which caused a long-term bed confinement. Shoulder pain that appeared after she started rehabilitation did not improve on administration of NSAIDs. We suspected pyogenic spondylitis in the cervical vertebraes based on the cervical X-rays and the cervical MRI. Patients of PD often have a shoulder pain due to various causes. When a patient with PD has a severe shoulder pain, we should suspect pyogenic spondylitis in the cervical vertebraes as one of the differential diagnoses. It is necessary to do immediately thorough imaging examinations.
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PMID:[A case of Parkinson's disease associated with pyogenic spondylitis in the cervical vertebrae]. 1240 52

Studies evaluating the risk of methicillin-resistant Staphylococcus aureus (MRSA)-associated sequelae in colonized or infected inpatients have not extended follow-up into the period after discharge from the hospital. We determined the 18-month risk of MRSA infection among 209 adult patients newly identified as harboring MRSA. Twenty-nine percent of patients (60 patients) developed subsequent MRSA infections (90 infections). These infections were often severe. Twenty-eight percent of infections (25 of 90) involved bacteremia, and 56% (50 of 90) involved pneumonia, soft tissue infection, osteomyelitis, or septic arthritis. Eighty percent of patients (48 of 60) with subsequent MRSA infection developed the infection at a new site, and 49% of new MRSA infections (44 of 90) first became manifest after discharge from the hospital. Accurate assessment of the risk of MRSA-associated sequelae requires prolonged follow-up after discharge.
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PMID:Risk of methicillin-resistant Staphylococcus aureus infection after previous infection or colonization. 1253 68

Enterococcus faecium is usually known as a pathogen of nosocomial infections in compromised patients. Recently it is a problem that some of the E. faecium become resistant to many antibiotics. It is not usual that this pathogen causes pneumonia. We report a community-acquired pneumonia by multidrug-resistant E. faecium in an outpatient who had been receiving hemodialysis for the past year. The patient recovered from pneumonia with vancomycin, but had nosocomial pneumonia caused by MRSA later but recovered.
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PMID:[A critical pneumonia by multidrug-resistant Enterococcus faecium in a chronic hemodialysis patient. A case report]. 1260 51

Extubation failure is one of the most serious complications in extremely low birth weight infants (ELBWI) on mechanical ventilation therapy. We performed a 5-year retrospective analysis to realize the status of extubation failure in ELBWI. Extubation failure was defined as requirements of re-intubation within 72 hours after extubation. The extubation failure rate was 21% (29/138). The mean birth body weight was 808.3 +/- 140.4 gm. The mean gestational age was 25.8 +/- 1.2 wks. The incidence of chronic lung disease (CLD) in infants with extubation failure was 100% (29/29). Apnea of prematurity 49% (14/29) and post-extubation atelectasis 39% (11/29) were the most common reasons for reintubation. The major microbiology findings which correlated with nosocomial pneumonia in infants with extubation failure were Acinetobacter baumanni (21%), Klebsiella pneumonia (21%), Pseudomonas aeroginosa (14%), and Methicillin resistant staphylococcus aureus (14%). In conclusion, post-extubation atelectasis and apnea were the most common reasons for reintubation. ELBWI with extubation failure had higher incidences of post-extubation atelectasis, CLD, and nosocomial pneumonia. Further prospective studies are needed in order to clarify the appropriate extubation program for ELBWI and to prevent post-extubation atelectasis and nosocomial pneumonia.
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PMID:Risk factors of extubation failure in extremely low birth weight infants: a five year retrospective analysis. 1263 84

Infection surveillance in ICU is fundamental to monitor endemic rates, to identify outbreaks on-time in order to activate control procedures implementing a correct empirical antibiotic treatment. The data collection surveillance software CIN-20002 was established in the Teaching Hospital Umberto I ICU to monitor the following site-specific infection rates: urinary tract infections (UTI), pneumonia (PNE), blood stream infections (BSI), surgical site infections (SSI). According to CDC definitions all patients developing infection 48 hours or more after ward admission were included. Furthermore risk factors (i.e. age, sex, SAPS II), invasive procedures (i.e. endotracheal intubation, vascular and urinary catheterisation), microbiological isolates and their antibiotic susceptibility were screened. Overall 279 patients (183 men and 96 women) were admitted; age 54,8 20,3 years (mean), SAPS II 44,4 17,1 (mean) and average ward stay 13,3 17,8 days. Results showed a total of 121 infection episodes (56 PNE, 51 BSI, 10 UTI e 4 SSI) in 80 patients (28,7%). Standardized infection rates associated to invasive procedures were: Urinary catheter-associated UTI rate (2.9/1000), Ventilator-associated PNE rate (20.4/1000), Vascular catheter-associated BSI rate (19.1/1000). Among the infected patients the most common microrganisms isolated were P. aeruginosa (31,8%), MRSA (14,8%), A. baumanni (12,5%) e S. maltophilia (8,5%). Considering site-specific infections: PNE (P. aeruginosa 38,3% and MRSA 18,1%), BSI (MR CNS 21,9% and P. aeruginosa 17,2%), UTI (P. aeruginosa 70,0%). The surveillance software CIN-2000 proved to be very accurate, usefull and easy to use. The results showed a high incidence of infections associated to invasive procedures and the presence of multiresistant bacteria
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PMID:[Microbiological surveillance in an intensive care unit of a large Roman hospital]. 1270 86

CONTRIBUTION OF CLINICAL EPIDEMIOLOGY: Clinical epidemiology goes beyond simply counting cases of resistance. The goal is to collect clinical data contributing to an explication of epidemiological observations enabling a classification into 4 types of resistance. GRAM POSITIVE BACTERIA: Depending on the specialty, Gram positive bacteria are the cause of a variable percentage of clinical infections. In oncology and hematology, Gram-positive infections appear to be on the rise due to the increase in the number of coagulase-negative staphylococcal infections. The percentage appears to be unchanged in intensive care. Community-acquired streptococcal infections include a growing number caused by Streptococcus viridans, with the development of resistance and an aggravation of Streptococcus pneumoniae resistance. Nosocomial Gram-positive infections show that the increase in the number of meticillin-resistant Staphylococcus aureus infections is slowing down with the emergence of exceptional Staphylococcus aureus strains exhibiting intermediary resistance to glycopeptides. STREPTOCOCCUS VIRIDANS: Isolation of Streptococcus viridans is becoming increasingly frequent, particularly in immunodepressed patients or in patients with surgical conditions such as peritonitis. Several risk factors have been identified. In vitro glycopeptides and linezolide would have 100% activity against S. viridans. METICILLIN-RESISTANT STAPHYLOCOCCUS AUREUS (MRSA): Infections caused by MRSA strains are rather exceptional compared with simple colonization. All patients with suspected Staphylococcus aureus infections should not be treated as if they had a MRSA infection. STREPTOCOCCUS PNEUMONIA: Beta-lactame resistant pneumococci have shown some progression.
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PMID:[Epidemiology of Gram-positive infections in France: changing resistance]. 1275 42

METHICILLIN-RESISTANT STAPHYLOCOCCUS AUREUS (MRSA) INFECTIONS: A growing number of MRSA strains with an increased minimum inhibitory concentration (MIC) and intermediary susceptibility to glycopeptides (GISA) or vancomycin (VISA) are encountered in clinical practice. In patients on mechanical ventilation who develop acute pneumonia, it would appear appropriate to achieve a vancomycin concentration in serum and the lung 2 to 4 times above the MIC, while carefully monitoring the risk of toxicity. POSSIBLE SOLUTIONS: Better prevention of severe MRSA infections, a more rational use of glycopeptides, using a recycling scheme, i.e. altering prescriptions with antibiotics other than glycopeptides or using combinations. OTHER AGENTS CURRENTLY AVAILABLE: Several antibiotic classes can now be used to preserve the efficacy of glycopeptides: cotrimoxazole, quinupristine/dalfopristine and linezolide. Linezolide is the first compound of a new family of antibiotics called oxazolidinones which are active against aerobic and anaerobic Gram positive strains, particularly those exhibiting intermediary sensitivity or resistance to other antibiotics. Its pharmacokinetic properties are quite favorable. ANTIBIOTIC COMBINATIONS: In case of severe MRSA infection, antibiotics that can be combined with vancomycin include gentamycin, rifampicin, or fosfonycine. For GISA infections, vancomycin could be combined with a ss-lactam, or quinupristine/dalfopristine. Combination with linezolide appears to be antagonistic.
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PMID:[Treatment of severe Gram-positive infections: current situation and new opportunities]. 1275 43

A 15-year-old girl developed a severe Staphylococcus aureus pneumonia following an influenza virus infection. The patient was admitted to a paediatric intensive-care facility because of respiratory and circulatory failure. Despite aggressive therapy, she died on the third day following admission to the intensive care unit due to secondary hypoxic-ischaemic encephalopathy. Blood and respiratory aspirate cultures showed community-acquired methicillin-resistant S. aureus (CA-MRSA) with a normal antibiotic sensitivity except for betalactam antibiotics. PCR-based methods demonstrated that the isolate possessed the Panton-Valentine-leukocidin (PVL) gene, encoding an S. aureus exotoxin that is associated with fulminant necrotising pneumonia. This case shows that clinicians in the Netherlands should also be aware of the possibility of CA-MRSA in patients without risk factors for MRSA carriage. Especially in children and adolescents with an influenza virus infection, pneumonia due to PVL-positive S. aureus strains may be life-threatening.
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PMID:[Fatal pneumonia in an adolescent due to community-acquired methicillin-resistant Staphylococcus aureus positive for Panton-Valentine-leukocidin]. 1281 14


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