First record of snakebites by Micrurus ortoni and Micrurus hemprichii (Serpentes: Elapidae) in Colombia and Perú.

We report two snakebites by Micrurus ortoni in Colombia and one by M. hemprichii in Perú. In two of the cases, we observed mild to moderate motor neurological involvement and in all patients, there was a marked sensory effect with hyperesthesia and hyperalgesia radiating from the bite site to the entire ipsilateral hemibody. The only patient who received antivenom, which did not correspond with the type of envenomation, developed equine serum sickness eight days after its administration. The results of the laboratory tests, including an electromyographic study, the photographic record of the clinical manifestations, and the causative agents are presented and discussed.