Adelfio was born in Palermo, Sicily, Italy on 4 March 1879. She married Giacomo Scataro on 19 November 1904 and had four children.
On 17 August 1986, aged 107, Adelfio became Italy’s oldest resident following the death of 108-year-old Luigina Pepe. She became a supercentenarian in 1989, becoming the fourth known person in Italy’s history to achieve such a milestone. On her 110th birthday, it was reported that she was in excellent health and could recollect numerous historical events.
Adelfio died on 4 November 1989 at the age of 110 years, 245 days in the same town she was born in. After her death, then-109-year-old Domenico Minervino became the oldest living person in Italy. Adelfio was never the oldest Italian-born person, as New York resident Amarillide Bufalini (1876 – 1990) was older and outlived her.