Dr Nava is a young Argentinean researcher whose interest is focused on systematics, ecology and control of ticks, and epidemiology of tick-borne pathogens. Within this subject area he coordinates different projects on ticks with medical and veterinary importance. The principal contribution of Dr. Nava has been in the study of Neotropical ticks, and he also has an active collaboration with scientists from more than 20 countries from America, Europe and Africa.