Q fever (Latin: Q-febris, ricketsiosis Q rickettsiosis, coxiellosis, pneumorickettsiosis, slaughterhouse fever, pneumonic typhus. Derrick-Burnett disease. Balkan flu, Central Asian fever) ay isang talamak na natural na focal zoonotic rickettsiosis na may iba't ibang mekanismo ng paghahatid ng pathogenoetheliosis.