BackgroundEnteroaggregative Escherichia coli (EAEC) are defined by their stacked-brick adherence pattern to human epithelial cells. There is no all-encompassing genetic marker for EAEC. The category is commonly implicated in diarrhea but research is hampered by perplexing heterogeneity.Methodology/Principal FindingsTo identify key EAEC lineages, we applied multilocus sequence typing to 126 E. coli isolates from a Nigerian case-control study that showed aggregative adherence in the HEp-2 adherence assay, and 24 other EAEC strains from diverse locations. EAEC largely belonged to the A, B1 and D phylogenetic groups and only 7 (4.6%) isolates were in the B2 cluster. As many as 96 sequence types (STs) were identified but 60 (40%) of the EAEC strains belong to or are double locus variants of STs 10, 31, and 394. The remainder did not belong to predominant complexes. The most common ST complex, with predicted ancestor ST10, included 32 (21.3%) of the isolates. Significant age-related distribution suggests that weaned children in Nigeria are at risk for diarrhea from of ST10-complex EAEC. Phylogenetic group D EAEC strains, predominantly from ST31- and ST394 complexes, represented 38 (25.3%) of all isolates, include genome-sequenced strain 042, and possessed conserved chromosomal loci.Conclusions/SignificanceWe have developed a molecular phylogenetic framework, which demonstrates that although grouped by a shared phenotype, the category of ‘EAEC’ encompasses multiple pathogenic lineages. Principal among isolates from Nigeria were ST10-complex EAEC that were associated with diarrhea in children over one year and ECOR D strains that share horizontally acquired loci.

OBJECTIVE: To assess outcomes of medication abortion provided through telemedicine compared with standard medication abortion at Planned Parenthood health centers in four U.S. states. METHODS: In this retrospective cohort study, we analyzed electronic health records for patients receiving telemedicine compared with standard medication abortion at 26 health centers in Alaska, Idaho, Nevada, and Washington from April 2017 to March 2018. All patients had on-site ultrasound scans, laboratory testing, and counseling and provided informed consent before meeting with the clinician. Telemedicine patients met with a clinician by secure videoconference platform; standard patients met with a clinician in person. We also reviewed adverse event reports submitted during this period. Study outcomes included ongoing pregnancy, receipt of or referral for aspiration procedure, and clinically significant adverse events. To compare outcomes between the telemedicine and standard groups, we performed logistic regression accounting for gestational age and health center clustering. RESULTS: A total of 5,952 patients underwent medication abortion (738 telemedicine and 5,214 standard). Mean gestational age was 50.4 days for telemedicine patients compared with 48.9 days for standard patients (prevalence ratio 1.02; 95% CI 1.00–1.03). We had outcome data for 4,456 (74.9%) patients; follow-up within 45 days of abortion was lower among telemedicine patients (60.3%) than standard patients (76.9%) (prevalence ratio 0.83; 95% CI 0.78–0.88). Among patients with follow-up data, ongoing pregnancy was less common among telemedicine patients (2/445, 0.5%) than standard patients (71/4,011, 1.8%) (adjusted odds ratio [OR] 0.23; 95% CI 0.14–0.39). Aspiration procedures were less common among telemedicine patients (6/445, 1.4%) than standard patients (182/4,011, 4.5%) (adjusted OR 0.28; 95% CI 0.17–0.46). Fewer than 1% of patients in each group reported clinically significant adverse events. No deaths were reported. CONCLUSION: Findings from this study conducted across geographically diverse settings support existing evidence that outcomes for medication abortion provided through telemedicine are comparable with standard provision of medication abortion. Differences in observed outcomes may be due to differential follow-up between groups.