Are you talking about Keralite Nurses??..Its not because Kerala Christians are brighter than others nor we are dominating Kerala medical colleges(only around 30-40% of medical colleges are Christian owned)..Even the Health minister of Kerala is a Hindu..
Because in Kerala,Nursing/Pharmacy professions are viewed as some what 'inferior' by majority of Hindu parents..So they show no interest in enrolling their children into nursing/pharmacy courses.Same for Muslims too...But their is no problem among Christians,so its quite natural to see more Christian nurses from Kerala..
Nursing is considered inferior, not medicine.
The Education minister of Kerala is either a Christian or Muslim. The last Hindu education minister in Kerala was 55 years back.