We are presenting a case report of a 5-year-old boy with infective endocarditis who presented with spiking high fevers, fierce pain in hip joint imitating coxitis caused by septic embolization. Subsequently a severe heart murmur appeared due to fast destruction of previously healthy aortic valve.
Overall condition of the patient required an urgent surgical treatment, the Ross procedure was performed. An aggressive serotype 15B/C of Streptococcus pneumoniae was revealed as causing pathogen.