A review of clinical failures associated with macrolide-resistant Streptococcus pneumoniae.
The emerging reports of clinical failures using macrolides and their associations with macrolide-resistant Streptococcus pneumoniae prompted us to review the literature describing these cases. Thirty-three cases reporting macrolide treatment failure during treatment of pneumococcal infections were available for review. The most prevalent diagnosis (24/27 or 88.8% of available diagnoses) was community-acquired pneumonia (CAP). Previous medical history included cardiopulmonary disease in eight (24.2%) and immunocompromised states in five (15.1%) patients. The majority, 31/33 (93.9%) of patients received oral macrolide treatment in an outpatient setting. S. pneumoniae was isolated from the blood in 26 (78.8%) of 33 patients, three (9.1%) patients had bacteria present in both blood and cerebrospinal fluid, two (6%) patients grew S. pneumoniae from blood and bronchial washings and two (6%) patients had positive sputum cultures. The MLS(B) phenotype was the most predominant phenotype present in 12 (63.2%) of 19 patients. After failing initial macrolide treatment, 26 (78.8%) of 33 patients received parenteral antibiotic treatment. Of 33 patients admitted to hospital, 29 (87.8%) had their outcome described as 'survived'.
Rzeszutek
Marek
M
Department of Medical Microbiology, Faculty of Medicine, Health Sciences Centre, University of Manitoba, Winnipeg, Man. R3A 1R9, Canada.
Wierzbowski
Aleksandra
A
Hoban
Daryl J
DJ
Conly
John
J
Bishai
William
W
Zhanel
George G
GG
D000293:Adolescent; D000328:Adult; D000900:Anti-Bacterial Agents / Q000494:pharmacology* / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D024881:Drug Resistance, Bacterial; D005260:Female; D006801:Humans; D007223:Infant; D018942:Macrolides / Q000494:pharmacology* / Q000627:therapeutic use; D008297:Male; D008826:Microbial Sensitivity Tests; D011008:Pneumococcal Infections / Q000188:drug therapy* / Q000382:microbiology; D011018:Pneumonia, Pneumococcal / Q000188:drug therapy / Q000382:microbiology; D013296:Streptococcus pneumoniae / Q000187:drug effects*; D017211:Treatment Failure
D000900:Anti-Bacterial Agents; D018942:Macrolides