Candida infection caused by intravenous or intracerebral contamination with a clinical strain of C. albicans 1755 was studied comparatively on 230 albino mice. The contamination doses ranged from 10(6) to 4 . 10(7) CFU/mouse. The developing infection could be characterized as Candida encephalomeningitis complicated by generalized candidiasis. Both the contamination routes mainly led to affections of the brain, kidneys and heart. The same distribution pattern of the pathogen was observed when the culture killed by heating was administered. The intracerebral route had advantages in chemotherapeutic studies since it induced less severe and more prolonged infection. Acute purulent inflammation of the brain and kidneys developing immediately after the contamination by days 5 to 6 was replaced by a granulomatous reaction and fibroplastic processes. Decreased acute inflammation along with changes in the nature of the pathogen vegetation and morphotinctorial properties in the affected organs can be used as a criterion of the antimycotic agent efficacy. A system for estimating pathomorphological changes in the tissues and the pathogen state is described and its use is illustrated with application of amphotericin B, mycoheptin and 5-phthorcytosine.