NEW YORK — Dr. Craig Spencer, the physician now being treated for Ebola in New York City, is the kind of globe-trotting do-gooder who could walk into a small village in Africa and, even though he didn’t know the language, win people over through hugs alone, according to people who worked with him.

Even before leaving for Guinea this summer to fight Ebola with Doctors Without Borders, the 33-year-old had amassed an ordinary man’s lifetime worth of world travel, much of which was in the service of the poor.

In the past three years alone, Spencer, an attending physician at New York-Presbyterian Hospital/Columbia University Medical Center, had been to Rwanda to work on an emergency care teaching curriculum, volunteered at a health clinic in Burundi, helped investigate an infectious parasitic disease in the Democratic Republic of Congo and traveled to 32 villages in Indonesia to do a public health survey.

“He was never afraid of getting his hands dirty or his feet dirty,” said Dr. Deogratias Niyizonkiza, founder of Village Health Works, the aid group that brought him to Burundi for four months in 2012.