Ma'anar ƙamus na kalmar "pneumocytosis" wani yanayi ne na likita wanda ke nuna kasancewar kwayoyin cutar Pneumocystis a cikin huhu, wanda zai iya haifar da ciwon huhu da sauran alamun numfashi. Kwayoyin pneumocystis wani nau'i ne na naman gwari da zai iya cutar da mutane masu raunin tsarin rigakafi, kamar masu cutar HIV/AIDS ko kuma ana yi musu magani. Hakanan ana kiran yanayin da Pneumocystis pneumonia (PCP) ko Pneumocystis jiroveci pneumonia (PJP).