title: Superinfection compatibility of R factors in Shigella dysenteriae type 1 from Central America and Salmonella typhi from Mexico.
mesh_terms: D001435:Bacteriophages; D002489:Central America; D003227:Conjugation, Genetic; D004352:Drug Resistance, Microbial; D004926:Escherichia coli; D005111:Extrachromosomal Inheritance; D005827:Genetics, Microbial; D006801:Humans; D008800:Mexico; D012475:Salmonella; D012762:Shigella dysenteriae