diphtheritic
[ dif-thuh-rit-ik, dip- ]
/ ˌdɪf θəˈrɪt ɪk, ˌdɪp- /
adjective Pathology.
pertaining to diphtheria.
affected by diphtheria.
Also
diph·the·ri·al
[dif-theer-ee-uh l, dip-] /dɪfˈθɪər i əl, dɪp-/,
diph·ther·ic
[dif-ther-ik, dip-] /dɪfˈθɛr ɪk, dɪp-/.