Koomanachai P, Tiengrim S, Kiratisin P, et al. Efficacy and safety of colistin (colistimethate sodium) for therapy of infections caused by multidrug-resistant Pseudomonas aeruginosa and Acinetobacter baumannii in Siriraj Hospital, Bangkok, Thailand

Division of Infectious Diseases and Tropical Medicine, Department of Medicine, Siriraj Hospital, Mahidol University, Prannok Road, Bangkok, Thailand.
International Journal of Infectious Diseases (Impact Factor: 1.86). 10/2007; 11(5):402-6. DOI: 10.1016/j.ijid.2006.09.011
Source: PubMed


To determine the efficacy and safety of colistin (colistimethate sodium) produced by a local pharmaceutical company in Thailand for the treatment of infections caused by multidrug-resistant (MDR) Pseudomonas aeruginosa and Acinetobacter baumannii.
Patients hospitalized at Siriraj Hospital between January 2005 and April 2006, who had infections caused by MDR P. aeruginosa or A. baumannii, were enrolled in the study. Colistin (colistimethate sodium) at a dosage of 5 mg/kg/day was given intravenously in two divided doses. Primary outcomes were the clinical response and 30-day mortality; secondary outcomes were microbiological response and adverse events.
Ninety-three patients infected with MDR P. aeruginosa and A. baumannii were enrolled. Seventy-eight patients (71 with A. baumannii and seven with P. aeruginosa) received colistin, whereas 15 patients (12 with A. baumannii and three with P. aeruginosa) received other antibiotics. The mean age, gender, underlying conditions and severity of illness of the patients in both groups were not significantly different. In the colistin group, 63 patients (80.8%) had a favorable clinical response and 94.9% had a microbiological response. The overall mortality of the patients in the colistin group was 46.2% and that in the non-colistin group was 80%. Nephrotoxicity was found in 24 patients (30.8%) in the colistin group and 17 of them had predisposing factors contributing to their renal dysfunction. No neurotoxicity was observed among the 78 patients.
Locally produced colistin appears to be safe and effective for the treatment of infections caused by MDR P. aeruginosa and A. baumannii in Thai adult patients.

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Available from: Pattarachai Kiratisin, Dec 27, 2014
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    • "Similar rates of nephrotoxicity are reported by other studies [24-26]. please, delete reference No 11 On the contrary, Koomanachai et al. and Kim et al. reported a colistin-induced nephrotoxicity in approximately 30% of patients [27,28]. "
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    ABSTRACT: ABSTRACT: Recent clinical studies performed in a large number of patients showed that colistin "forgotten" for several decades revived for the management of infections due to multidrug-resistant (MDR) Gram-negative bacteria (GNB) and had acceptable effectiveness and considerably less toxicity than that reported in older publications. Colistin is a rapidly bactericidal antimicrobial agent that possesses a significant postantibiotic effect against MDR Gram-negative pathogens, such as Pseudomonas aeruginosa, Acinetobacter baumannii, and Klebsiella pneumoniae. The optimal colistin dosing regimen against MDR GNB is still unknown in the intensive care unit (ICU) setting. A better understanding of the pharmacokinetic-pharmacodynamic relationship of colistin is urgently needed to determine the optimal dosing regimen. Although pharmacokinetic and pharmacodynamic data in ICU patients are scarce, recent evidence shows that the pharmacokinetics/pharmacodynamics of colistimethate sodium and colistin in critically ill patients differ from those previously found in other groups, such as cystic fibrosis patients. The AUC:MIC ratio has been found to be the parameter best associated with colistin efficacy. To maximize the AUC:MIC ratio, higher doses of colistimethate sodium and alterations in the dosing intervals may be warranted in the ICU setting. In addition, the development of colistin resistance has been linked to inadequate colistin dosing. This enforces the importance of colistin dose optimization in critically ill patients. Although higher colistin doses seem to be beneficial, the lack of colistin pharmacokinetic-pharmacodynamic data results in difficulty for the optimization of daily colistin dose. In conclusion, although colistin seems to be a very reliable alternative for the management of life-threatening nosocomial infections due to MDR GNB, it should be emphasized that there is a lack of guidelines regarding the ideal management of these infections and the appropriate colistin doses in critically ill patients with and without multiple organ failure.
    Annals of Intensive Care 08/2011; 1(1):30. DOI:10.1186/2110-5820-1-30 · 3.31 Impact Factor
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    • "Among these patients, 50% exhibited typical features consistent with critical illness polymyoneuropathy, but none had evidence of neuromuscular junction blockade [4]. Of note, no cases of clinically significant neurotoxicity were observed in a large group of patients with underlying neurological disease or disorders admitted to a neurosurgical ICU [11]. Finally, neuromuscular blockade was never seen in prospective studies evaluating CMS treatment [2-4,8,12,13,15]. "
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    ABSTRACT: Colistin is a complex polypeptide antibiotic composed mainly of colistin A and B. It was abandoned from clinical use in the 1970s because of significant renal and, to a lesser extent, neurological toxicity. Actually, colistin is increasingly put forward as salvage or even first-line treatment for severe multidrug-resistant, Gram-negative bacterial infections, particularly in the intensive care setting. We reviewed the most recent literature on colistin treatment, focusing on efficacy and toxicity issues. The method used for literature search was based on a PubMed retrieval using very precise criteria. Despite large variations in dose and duration, colistin treatment produces relatively high clinical cure rates. Colistin is potentially nephrotoxic but currently used criteria tend to overestimate the incidence of kidney injury. Nephrotoxicity independently predicts fewer cures of infection and increased mortality. Total cumulative colistin dose is associated with kidney damage, suggesting that shortening of treatment duration could decrease the incidence of nephrotoxicity. Factors that may enhance colistin nephrotoxicity (i.e., shock, hypoalbuminemia, concomitant use of potentially nephrotoxic drugs) must be combated or controlled. Neurotoxicity does not seem to be a major issue during colistin treatment. A better knowledge of colistin pharmacokinetics in critically ill patients is imperative for obtaining colistin dosing regimens that ensure maximal antibacterial activity at minimal toxicity.
    Annals of Intensive Care 05/2011; 1(1):14. DOI:10.1186/2110-5820-1-14 · 3.31 Impact Factor
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    ABSTRACT: This paper proposes an adaptive channel selection method that reduces signal distortion due to frequency selective fading and thereby improving the performance of mobile communication. In this method a channel is adaptively selected by estimating current channel condition with mean square decision error as a measure. This selected frequency channel corresponds to the channel in which the delayed signals add-up inphase. Hence, BER performance is improved with the proposed scheme. Computer simulation results show the effectiveness of the proposed scheme for a system with multiple terminals and also for a multiple base station (cellular) system
    Communications, 1999. ICC '99. 1999 IEEE International Conference on; 02/1999
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