Pneumococcal susceptibility to antibiotics in carriage: a 17 year time series analysis of the adaptive evolution of non-vaccine emerging serotypes to a new selective pressure environment.

BACKGROUND: Pneumococcal conjugate vaccine (PCV) implementations led to major changes in serotype distribution and antibiotic resistance in carriage, accompanied by changes in antibiotic consumption. OBJECTIVES: To assess the dynamic patterns of antimicrobial non-susceptibility across non-PCV13 serotypes following PCV implementations. METHODS: We conducted a quasi-experimental interrupted time series analysis based on a 17 year French nationwide prospective cohort. From 2001 to 2018, 121 paediatricians obtained nasopharyngeal swabs from children with acute otitis media who were aged 6 months to 2 years. The main outcome was the rate of penicillin-non-susceptible pneumococci (PNSP), analysed by segmented regression. RESULTS: We enrolled 10 204 children. After PCV13 implementation, the PNSP rate decreased (-0.5% per month; 95% CI -0.9 to -0.1), then, after 2014, the rate slightly increased (+0.7% per month; 95% CI +0.2 to +1.2). Global antibiotic use within the previous 3 months decreased over the study period (-22.2%; 95% CI -33.0 to -11.3), but aminopenicillin use remained high. Among the main non-PCV13 serotypes, four dynamic patterns of penicillin susceptibility evolution were observed, including unexpected patterns of serotypes emerging while remaining or even becoming penicillin susceptible. In contrast to PNSP strains, for these latter patterns, the rate of co-colonization with Haemophilus influenzae increased concomitant with their emergence. CONCLUSIONS: In a context of continuing high antibiotic selective pressure, a progressive increase in PNSP rate was observed after 2014. However, we highlighted an unexpected variability in dynamic patterns of penicillin susceptibility among emerging non-PCV13 serotypes. Antibiotic resistance may not be the only adaptive mechanism to antimicrobial selective pressure, and co-colonization with H. influenzae may be involved.

Breastfeeding Assessment Score: Systematic Review and Meta-analysis.

BACKGROUND: Previous studies have revealed conflicting results for the Breastfeeding Assessment Score (BAS) in predicting early breastfeeding cessation. Our objective was to externally validate the BAS and provide summary accuracy estimates for this clinical prediction model. METHODS: We used the original data from a prospective cohort study. Additional studies were identified by searching electronic databases (Medline, Embase, Cumulative Index to Nursing and Allied Health Literature, and Cochrane) from 2002 to 2013 and contacting research groups that had derived or validated the BAS. Prospective cohort studies were eligible if the BAS was computed at baseline and mothers were followed up for breastfeeding cessation. Two physicians extracted relevant information and independently assessed the methodological quality for the included studies. RESULTS: In the external validation cohort, 22 of 424 mothers (5.2%) discontinued breastfeeding within 14 days of infant age. The BAS predicted early breastfeeding cessation with an area under the curve of 0.70 (95% confidence interval [CI]: 0.65 to 0.74) and inadequate calibration. When restricting the meta-analysis to 3169 mother-infant pairs enrolled in 4 higher-quality studies, a BAS value <8 predicted early cessation with 0.80 sensitivity (95% CI: 0.69 to 0.91) and 0.51 specificity (95% CI: 0.32 to 0.70) summary estimates. CONCLUSIONS: Substantial between-study heterogeneity limited the interpretation of summary accuracy estimates. The BAS predicts early breastfeeding cessation with moderate accuracy, although local recalibration is advised before implementation. Further study is warranted to determine whether the BAS can help pediatricians in identifying mother-infant pairs that may benefit from more extensive breastfeeding assessment and support.

Determinants of 6-month maternal satisfaction with breastfeeding experience in a multicenter prospective cohort study.

Although a personally defined experience, successful breastfeeding is usually measured with regard to duration. This study investigated the determinants of maternal satisfaction with breastfeeding experience for 907 mothers enrolled in a prospective cohort study. Despite a median breastfeeding duration (18 weeks) that fell short of recommendations, 822 mothers (90.6%) rated their breastfeeding experience as very or fairly satisfactory. Anticipated breastfeeding duration was a determinant of satisfaction only for women who actually breastfeed < 2 months; in this subgroup of mothers, satisfaction rates ranged from 84.6% for those who anticipated breastfeeding < 2 months to 69.8% for those who anticipated breastfeeding > 4 months (P = .01). Smoking during pregnancy and experiencing breastfeeding difficulties after discharge were independently associated with decreased satisfaction. Eliciting the mother's expectations regarding breastfeeding duration may help the lactation consultant in providing appropriate guidance. Future studies should assess maternal satisfaction using validated instruments.

CD-ROM-based program for breastfeeding mothers.

The vast majority of breastfeeding mothers in Western countries have routine access to multimedia and Internet resources at home. The aim of this study was to assess the effectiveness of a CD-ROM-based intervention in increasing the rates of breastfeeding. We conducted a pre- and post-intervention study involving four control and four intervention maternity units in France. All breastfeeding mothers in intervention units were given a CD-ROM-based program addressing various breastfeeding topics. The primary outcome was any breastfeeding at 4 weeks assessed by follow-up telephone interview. The secondary outcomes included breastfeeding duration, breastfeeding difficulties after discharge and satisfaction with the breastfeeding experience. The rates of any breastfeeding at 4 weeks varied from 88.6% (209/236) to 87.9% (211/240) and from 86.0% (222/258) to 88.0% (228/259) for mothers enrolled in intervention and control maternity units, respectively (P for interaction=0.54). The hazard of breastfeeding discontinuation for mothers enrolled in intervention units did not vary significantly across study periods after adjusting for education level, epidural anaesthesia, breastfeeding assessment score and return to work (P for interaction=0.18). The rates of breastfeeding at 4 weeks remained unchanged when restricting the analysis to the mothers who actually received (87.8% [173/197]) or used [88.2% (105/119)] the CD-ROM during the post-intervention period. No significant differences were found in secondary outcomes between the two study groups. A CD-ROM-based intervention for breastfeeding mothers provides no additional benefit to usual post-natal care. Further study is needed to assess the effectiveness of multimedia packages as part of more intensive multifaceted interventions.

Breastfeeding outcomes for mothers with and without home access to e-technologies.

AIM: To estimate the percentage of breastfeeding mothers with home access to e-technologies and to compare breastfeeding outcomes for mothers with and without access to e-technologies. METHODS: We conducted a prospective observational study of 550 breastfeeding mothers discharged from nine maternity units in France. RESULTS: Overall, 435 mothers (79%; 95% confidence interval [95% CI], 75-82) had home access to e-technologies. Mothers with access to e-technologies were less likely to be unemployed (6% vs. 15%, p = 0.004), to smoke during pregnancy (8% vs. 16%, p = 0.03), to have a breastfeeding assessment score <8 (39% vs. 59%, p < 0.001) and to use a pacifier (23% vs. 41%, p < 0.001). Although mothers with access to e-technologies had a longer median breastfeeding duration than those without home access to e-technologies (19 vs. 16 weeks, p = 0.02), adjusted hazard ratios for breastfeeding discontinuation (0.85; 95% CI, 0.60-1.21), overall satisfaction rates (73% vs. 67%, p = 0.19) and breastfeeding difficulties after discharge (58% vs. 61%, p = 0.60) were not different for the two groups. CONCLUSION: A vast majority of breastfeeding mothers have home access to e-technologies in France. However, access to e-technologies was not independently associated with better breastfeeding outcomes in this study.

Efficacy of breastfeeding support provided by trained clinicians during an early, routine, preventive visit: a prospective, randomized, open trial of 226 mother-infant pairs.

BACKGROUND: Despite growing evidence of the benefits of prolonged breastfeeding for mother and infant health, the rate of breastfeeding at infant age of 6 months remains below the Healthy People 2010 goal. The greatest decrease in the breastfeeding rate occurs during the first 4 postpartum weeks. Mothers who discontinue breastfeeding early are more likely to report lack of confidence in their ability to breastfeed, problems with the infant latching or suckling, and lack of individualized encouragement from their clinicians in the early postdischarge period. Observational studies suggest that primary care physicians can increase breastfeeding rates through specific advice and practices during routine preventive visits. However, robust scientific evidence based on randomized, controlled trials is currently lacking. OBJECTIVE: The purpose of this study was to determine whether attending an early, routine, preventive, outpatient visit delivered in a primary care physician's office would improve breastfeeding outcomes. DESIGN: The study was a prospective, randomized, parallel-group, open trial. SETTING: Participants were recruited at a level 3 maternity facility, with an average of 2000 births per year, in France. PARTICIPANTS: A total of 231 mothers who had delivered a healthy singleton infant (gestational age: > or =37 completed weeks) and were breastfeeding on the day of discharge were recruited and randomized (116 were assigned to the intervention group and 115 to the control group) between October 1, 2001, and May 31, 2002; 226 mother-infant pairs (112 in the intervention group and 114 in the control group) contributed data on outcomes. INTERVENTION: Support for breastfeeding in the control group included the usual verbal encouragement provided by the maternity ward staff members, a general health assessment and an evaluation for evidence of successful breastfeeding behavior by the pediatrician working in the obstetrics department on the day of discharge, provision of the telephone number of a peer support group, mandatory routine, preventive, outpatient visits at 1, 2, 3, 4, 5, and 6 months of infant age, and 10 weeks of paid maternity leave (extended to 18 weeks after the birth of the third child). In addition to the usual predischarge and postdischarge support, the mothers in the intervention group were invited to attend an individual, routine, preventive, outpatient visit in the office of 1 of the 17 participating primary care physicians (pediatricians or family physicians) within 2 weeks after the birth. The participating physicians received a 5-hour training program on breastfeeding, delivered in 2 parts in 1 month, before the beginning of the study. OUTCOME MEASURES: The primary outcome was the prevalence of exclusive breastfeeding reported at 4 weeks (defined as giving maternal milk as the only food source, with no other foods or liquids, other than vitamins or medications, being given). The secondary outcomes included any breastfeeding reported at 4 weeks, breastfeeding duration, breastfeeding difficulties, and satisfaction with breastfeeding experiences. Classification into breastfeeding categories reported at 4 weeks was based on 24-hour dietary recall. RESULTS: Ninety-two mothers (79.3%) assigned to the intervention group and 8 mothers (7.0%) assigned to the control group reported that they had attended the routine, preventive, outpatient visit in the office of 1 of the 17 primary care physicians participating in the study. Mothers in the intervention group were more likely to report exclusive breastfeeding at 4 weeks (83.9% vs 71.9%; hazard ratio: 1.17; 95% confidence interval [CI]: 1.01-1.34) and longer breastfeeding duration (median: 18 weeks vs 13 weeks; hazard ratio: 1.40; 95% CI: 1.03-1.92). They were less likely to report any breastfeeding difficulties (55.3% vs 72.8%; hazard ratio: 0.76; 95% CI: 0.62-0.93). There was no significant difference between the 2 groups with respect to the rate of any breastfeeding at 4 weeks (89.3% vs 81.6%; hazard ratio: 1.09; 95% CI: 0.98-1.22) and the rate of mothers fairly or very satisfied with their breastfeeding experiences (91.1% vs 87.7%; hazard ratio: 1.04; 95% CI: 0.95-1.14). CONCLUSIONS: Although we cannot exclude the possibility that findings might differ in other health care systems, this study provides preliminary evidence of the efficacy of breastfeeding support through an early, routine, preventive visit in the offices of trained primary care physicians. Our findings also suggest that a short training program for practicing physicians might contribute to improving breastfeeding outcomes. Multifaceted interventions aiming to support breastfeeding should involve primary care physicians.