The Health Services of Yucatan (SSY) confirm the presence in the state of spiders of the genus "Latrodectus" of the species "Latrodectus mactans" (black widow) and "Latrodectus geometricus" (widow) in the municipalities of Mérida and Tzucacab since 2012.
Spiders of the genus "Latrodectus" belong to the family "Theridiidae" and among them stands out, due to its medical importance, the species "Latrodectus mactans", commonly known as black widow spider or capulina. Its poison can cause severe poisoning in humans, with important consequences; including death.
The genus "Latrodectus" is of cosmopolitan distribution and can be found from the United States to Chile, in the American Continent. Two species of this genus have been reported for Mexico: "Latrodectus mactans" (Fabricius, 1775) (black widow) and "Latrodectus geometricus" C. L. Koch, 1841 (brown widow).
In Mexico, the "mactans" is common in the southern states on the Pacific slope, such as Chiapas, Guerrero, and Oaxaca, as well as in Sonora, Guanajuato, Jalisco, Aguascalientes, Morelos.
The reported distribution of "L. mactans "in the Yucatan Peninsula currently includes Campeche, while the" L. geometricus "is only reported in Quintana Roo. In Yucatan, the presence of "L. mactans "and" L. geometricus "in two sites of Mérida and one of Tzucacab, both species of importance in public health.
From the records in 2012, the Yucatan Services established the program of intoxication and attention for intoxication of the black widow, in which the procedures and actions to be performed are defined in the presence of Latrodectismo, a general term that is assigned to the syndrome of poisoning by spider bites Latrodectus.