typhus vs murine typhus

typhus and murine typhus both are nouns.

Word	Noun	Adjective	Verb	Adverb
typhus	Yes	No	No	No
murine typhus	Yes	No	No	No

As nouns, murine typhus is a hyponym of typhus; that is, murine typhus is a word with a more specific, narrower meaning than typhus:

typhus: rickettsial disease transmitted by body lice and characterized by skin rash and high fever
murine typhus: acute infection caused by rickettsia and transmitted by the bite of an infected flea; characterized by fever and chills and muscle aches and a rash

Other hyponyms of typhus include endemic typhus, rat typhus, urban typhus.

typhus (noun)	murine typhus (noun)
rickettsial disease transmitted by body lice and characterized by skin rash and high fever	acute infection caused by rickettsia and transmitted by the bite of an infected flea; characterized by fever and chills and muscle aches and a rash