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Use of Artificial Sputum Medium to Test Antibiotic Efficacy Against Pseudomonas aeruginosa in Conditions More Relevant to the Cystic Fibrosis Lung
Published on: June 5, 2012
[Drug resistance and floral distribution of Pseudomonas aeruginosa]
1Plastic Surgery Center, Xijing Hospital, Fourth Military Medical University, Xi-an.
Abstract:
100 strains of pseudomonas aeruginosa were isolated from June, 1986 to Sept. 1989. Results of antibiotic susceptibility test indicated that resistance to convenient antibiotics was serious. Minimum inhibitory concentration showed pseudomonas aeruginosa was more susceptible to ceftazidime, norfloxacin and amikacin. Typing investigation indicated that pseudomonas aeruginosa infection in this burn ward was mainly serotype P 11, cross-infection was existent, so isolation measure should be strengthened.
Insights
Pseudomonas aeruginosa strains showed serious antibiotic resistance. Ceftazidime, norfloxacin, and amikacin were most effective, indicating a need for strengthened isolation measures in burn units.
Area of Science:
- Clinical microbiology
- Infectious diseases
- Burn wound infections
Background:
- Pseudomonas aeruginosa is a common opportunistic pathogen in burn wound infections.
- Antibiotic resistance in P. aeruginosa poses a significant challenge in clinical settings.
Purpose of the Study:
- To investigate the antibiotic susceptibility patterns of Pseudomonas aeruginosa strains isolated from a burn ward.
- To identify prevalent serotypes and assess the extent of cross-infection.
Main Methods:
- Isolation and identification of 100 P. aeruginosa strains from burn patients between June 1986 and September 1989.
- Antibiotic susceptibility testing and minimum inhibitory concentration (MIC) determination.
- Serotyping investigation to determine the predominant serotype.
Main Results:
- High levels of resistance to commonly used antibiotics were observed.
- Ceftazidime, norfloxacin, and amikacin demonstrated the lowest MIC values, indicating higher susceptibility.
- Serotype P 11 was identified as the predominant strain, with evidence of cross-infection.
Conclusions:
- The study highlights a serious antibiotic resistance problem with P. aeruginosa in the burn ward.
- Ceftazidime, norfloxacin, and amikacin are potential therapeutic options.
- Strengthened isolation protocols are crucial to control the spread of P. aeruginosa, particularly serotype P 11, and prevent cross-infection.
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