To study the mortality and morbidity of infectious diseases for HIV infected patients admitted to the pneumology department of CHU Yalgado Ouédraogo, Burkina Faso, the authors run a retrospective survey on 225 sick people. The output of this survey revealed that 92% of the patients where HIV infected, 67.1% of the patients were below 40 years of age and the average age was 36.7. The most common infectious pathologies were bacterial lung diseases (44.9%) and tuberculosis (33.8). The overall mortality rate was 26.2%. The most lethal pathologies were respectively, bacterial diseases 44.9%, tuberculosis 33.8%, cases where the cause was not found 9.8%. In most of the cases, patients at stage B and C of HIV/AIDS were admitted to hospital (74.7%). This situation raises the issue of late diagnostic of side infections, due the tardiness in consulting and therefore, the difficulties resulting from HIV patients' healthcare in our context.