Abstract
Abstract House flies, Musca domestica L. (Diptera: Muscidae), are of medical and veterinary importance due to their capacity to act as mechanical vectors of microorganisms originating in animal manure and other decaying organic substrates. House flies that disperse from rural to urban areas may also transport antibiotic resistant bacterial strains. To assess the potential of house flies to disperse from rural to urban areas and distribute antibiotic-resistant bacteria, we undertook a two part study: (i) we quantified the dispersal rate of house flies from farms (rural areas) into a city (urban area) using multilocus DNA fingerprinting and (ii) we profiled the antibiotic resistance patterns of enterococci harbored by house flies collected in rural and urban environments. The population genetic analysis indicated that there was considerable dispersal between rural and urban habitats. Although there was a significant difference in allele frequency between the urban and rural samples, genetic divergence was l...
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