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• W3136558412 abstract "The ongoing emergence of antibiotic resistant strains and high frequencies of antibiotic resistance of Streptococcus pneumoniae poses a major public health challenge. How and which ecological and evolutionary mechanisms maintain the coexistence of antibiotic resistant and susceptible strains remains largely an open question. We developed an individual-based, stochastic model expanding on a previous pneumococci modelling framework. We explore how between- and within-host mechanisms of competition can sustain observed levels of resistance to antibiotics in the pre-vaccination era. Our framework considers that within-host competition for co-colonization between resistant and susceptible strains can arise via pre-existing immunity (immunological competition) or intrinsic fitness differences due to resistance costs (ecological competition). We find that beyond stochasticity, population structure or movement, competition at the within-host level can explain observed resistance frequencies. We compare our simulation results to pneumococcal antibiotic resistance data in the European region using approximate Bayesian computation. Our results demonstrate that ecological competition for co-colonization can explain the variation in co-existence of resistant and susceptible pneumococci observed in the pre-vaccination era. Furthermore, we show that within-host pneumococcal competition can facilitate the maintenance of resistance in the pre-vaccination era. Accounting for these competition-related components of pneumococcal dynamics can improve our understanding of drivers for the emergence and maintenance of antibiotic resistance in pneumococci." @default.
• W3136558412 created "2021-03-29" @default.
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• W3136558412 date "2021-03-16" @default.
• W3136558412 modified "2023-10-16" @default.
• W3136558412 title "Pneumococcal Competition Modulates Antibiotic Resistance in the Pre-Vaccination Era: A Modelling Study" @default.
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• W3136558412 doi "https://doi.org/10.3390/vaccines9030265" @default.
• W3136558412 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8002235" @default.
• W3136558412 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33809706" @default.
• W3136558412 hasPublicationYear "2021" @default.
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