ABSTRACT
We compared sequence types (STs) of Mycoplasma pneumoniae isolates from Japan during 2002-2019. ST3 and ST14 dominated during 2002-2016, and ST7 and ST33 dominated during 2018-2019. These STs were associated with a decrease in macrolide-resistant strains after an epidemic of infection with M. pneumoniae during 2011-2012.
Subject(s)
Mycoplasma pneumoniae , Pneumonia, Mycoplasma , Anti-Bacterial Agents/pharmacology , Anti-Bacterial Agents/therapeutic use , Drug Resistance, Bacterial , Humans , Japan/epidemiology , Macrolides/pharmacology , Microbial Sensitivity Tests , Mycoplasma pneumoniae/genetics , Pneumonia, Mycoplasma/drug therapy , Pneumonia, Mycoplasma/epidemiologyABSTRACT
The sensitivity and specificity of a new rapid Mycoplasma pneumoniae antigen immunochromatography (IC) test, DK-MP-001, were determined using particle agglutination (PA) antibody response and loop-mediated isothermal amplification (LAMP) gene detection as the gold standard. Of 165 patients, 59 were diagnosed with M. pneumoniae infection based on a ≥fourfold rise of serum PA antibody during the course of the illness. Of the first visit swabs, 60 were positive for M. pneumoniae on LAMP, and 49 were positive for M. pneumoniae antigen on IC test. Compared with PA antibody and LAMP, the sensitivity/specificity of the IC test were 81.4% (48/59) and 99.1% (105/106); and 81.7% (49/60) and 100% (105/105), respectively. IC test detected antigen in pharyngeal swabs more sensitively than in nasal swabs for the same subjects (P < 0.05). The IC test performs well enough to be used with pharyngeal swabs at the first examination.
