After graduating in medicine from the
University of Malta, Zammit specialised in
bacteriology in London and Paris. It is understood that in 1905 the discovery of contaminated milk as the vector for transmission to humans of
Brucellosis melitensis present in the blood of the goat greatly contributed to the elimination from the islands of undulant fever, earning him the knighthood. Author of several literary works in the
Maltese language, Zammit was conferred the DLitt Honoris Causa by Oxford University. He was
knighted in
1930, having previously been admitted as a Companion to the
Order of St Michael and St George. He also published a history of the Maltese islands and excavated important archaeological sites, such as the
Hypogeum and the megalithic
Tarxien Temples,
Ħaġar Qim and
Mnajdra, which have since been declared
UNESCO World Heritage Sites. ==Legacy==