Many early taxonomic works on North American bees were published by Europeans using specimens collected in the New World, some with type locations so imprecise that uncertainty nomenclatural status remains to this day. Two examples come from Fabricius (1745–1808) who described Andrena virescens Fabricius, 1775 and Apis viridula 1793 “America” “Boreal America”, respectively. The former species o...

Bellare, Guérin, and Rogaway proposed a very efficient and secure message authentication scheme. By slightly modifying it, this article shows that the security is improved.

bcg (bacille calmette–guérin) vaccine is administered worldwide to prevent severe forms of tuberculosis. it is considered to be safe; however, occasional complications are seen. the most serious complication is bcgosis. we report a case of bcgosis with granulomatous hepatitis and acid-fast bacilli in liver and spleen. we treated the patient with antituberculosis drugs without any response to tr...

Antecedentes: Los errores innatos de la inmunidad se manifiestan con una mayor susceptibilidad a infecciones, autoinmunidad, enfermedades autoinflamatorias, alergia o malignidad. Uno estos es mendeliana infecciones micobacterianas. La etiología más frecuente deficiencia completa autosómica recesiva subunidad β1 del receptor interleucina 12.Caso clínico: Paciente que comenzó los seis meses edad ...

Megachile saulcyi (Guérin-Méneville, 1844) is reported for first time cutting pieces from a plastic bag that are used the construction of its nest, this being record bee performing activity in Chile. The growing problem solitary bees use cells their nest analyzed as well consequences they can originate survival populations.