Coexistence of PMQR and ESBL genes among clinical Escherichia coli isolates from community-acquired UTI in Mexicali, on the US-Mexico border Dolores A. Marquez-Salazar; Ricardo Delgadillo-Valles; Gerson N. Hernandez-Acevedo; Edwin Barrios-Villa; Raquel Muñiz-Salazar; Gilberto Lopez-Valencia; Paulina Haro; Enrique Trasviña-Muñoz; Rafael Martinez-Miranda; Jonathan Arauz-Cabrera;