The current medical therapy for Mycobacterium avium complex is controversial. American Thoracic Society recommendations advocate empiric therapy with drug susceptibility testing only for clarithromycin. At National Jewish, where we mainly see cases complicated by treatment failure and drug intolerance, we use in vitro susceptibility testing and therapeutic drug monitoring to optimize efficacy a...

In Papua, Indonesia, the antimalarial susceptibility of Plasmodium vivax (n = 216) and P. falciparum (n = 277) was assessed using a modified schizont maturation assay for chloroquine, amodiaquine, artesunate, lumefantrine, mefloquine, and piperaquine. The most effective antimalarial against P. vivax and P. falciparum was artesunate, with geometric mean 50% inhibitory concentrations (IC50s) (95%...

The effects of protein binding on the activities of caspofungin, anidulafungin, and micafungin were evaluated against Candida and Aspergillus species. Adding human serum sharply increased the MICs of micafungin and anidulafungin and modestly affected the MIC of caspofungin. The increase in MICs does not appear consistent with the rate of protein binding for the three compounds.

We find the article by MIGLIORI et al. [1], on extensively drug-resistant tuberculosis (XDR-TB), very informative and would like to commend them for the excellent meta-analysis. Without any doubt, XDR-TB is an extensive global problem; the use of the lower susceptibility breaking points that we recently suggested [2] mean that the burden of XDR-TB could be even higher. Although there are recent...

Methods: Isolates were cultured directly from porcine lung sections and positively identified as M. hyopneumoniae using an indirect-fluorescent antibody (IFA) method. A Sensititre® plate broth microdilution technique was used to determine the minimum inhibitory concentrations (MICs) of each of the antimicrobials. Inocula concentrations were determined by serial tenfold dilutions of the 14 M. hy...

A total of 60 clinical isolates of Paracoccidioides brasiliensis were tested for susceptibility to sulfadiazine and sulfadimethoxyne by the agar dilution technique. A modification of the Mueller-Hinton medium was devised which gave good growth of the yeast form. The minimum inhibitory concentrations for only 51.6% of the isolates were in the range of the recommended blood serum concentration (5...

Penicillin class antibiotics have demonstrated varying degrees of in vivo and in vitro success when tested against Chlamydia trachomatis. The activity of ampicillin-sulbactam, an agent commonly utilized in the treatment of pelvic infections, was tested to ascertain if any antichlamydial activity is present. Up to six endocervical isolates of C. trachomatis were tested against each of five antib...

We performed bedaquiline broth microdilution susceptibility testing using Clinical and Laboratory Standards Institute (CLSI) guidelines on 103 respiratory isolates of Mycobacterium avium complex (MAC), including multidrug-resistant isolates. Approximately 90% of isolates had bedaquiline MICs of ≤0.008 μg/ml, and 102/103 isolates had MICs of ≤0.015 μg/ml. Bedaquiline has excellent potential for ...