RESUMEN
Nearly two thirds of persons suspected of having tickborne illness in central North Carolina, USA, were not tested for Ehrlichia. Failure to test may have resulted in a missed diagnosis for ≈13% of these persons, who were therefore substantially less likely to receive antimicrobial treatment and to have follow-up testing performed.
Asunto(s)
Vectores Arácnidos/microbiología , Ehrlichia/inmunología , Ehrlichiosis/diagnóstico , Ixodidae/microbiología , Enfermedades por Picaduras de Garrapatas/diagnóstico , Adulto , Anciano , Animales , Antibacterianos/uso terapéutico , Estudios de Cohortes , Demografía , Doxiciclina/uso terapéutico , Ehrlichia/aislamiento & purificación , Ehrlichiosis/tratamiento farmacológico , Ehrlichiosis/epidemiología , Ehrlichiosis/microbiología , Femenino , Humanos , Masculino , Persona de Mediana Edad , North Carolina/epidemiología , Estudios Retrospectivos , Estudios Seroepidemiológicos , Enfermedades por Picaduras de Garrapatas/tratamiento farmacológico , Enfermedades por Picaduras de Garrapatas/epidemiología , Enfermedades por Picaduras de Garrapatas/microbiologíaRESUMEN
Muscarinic receptors are known to play important biological roles and are drug targets for several human diseases. In a pilot study, novel muscarinic antagonists were synthesized and used as chemical probes to obtain additional information of the muscarinic pharmacophore. The design of these ligands made use of current orthosteric and allosteric models of drug-receptor interactions together with chemical motifs known to achieve muscarinic receptor selectivity. This approach has led to the discovery of several non-competitive muscarinic ligands that strongly bind at a secondary receptor site. These compounds were found to be non-competitive antagonists that completely abolished carbachol activation in functional assays. Several of these compounds antagonized functional response to carbachol with great potency at M1 and M4 than at the rest of receptor subtypes.