Academic Performance Colombia Drogas ilícitas Drug users Gram-positive bacteria Illicit drugs Listeria monocytogenes Problem Behavior Salmonella Staphylococcus aureus adolescent behavior agentes antibacterianos antibacterial agents bacterias Gram positivas calidad catheter related infections coliformes coliforms conducta del adolescente consumidores de drogas dairy products dispositivos de acceso vascular dispositivos de acesso vascular doenças profissionais drug resistance enfermedades profesionales enfermedades transmitidas por los alimentos food safety foodborne illness foos inspection