ABSTRACT
The coagulase activities of various Candida spp were assessed using a classical tube test. A total of 125 clinical Candida isolates representing eight species (C. albicans, C. parapsilosis, C. tropicalis, C. glabrata, C. kefyr, Geotrichum candidum, C. krusei and C. guilliermondii) were incubated with rabbit, sheep or human plasma. After 24 h incubation, 29/64 (45.3%) C. albicans isolates and 23/61 (37.7%) non-albicans Candida strains were positive for coagulase in rabbit plasma, whereas 20/64 (31.2%) C. albicans and 6/61 (9.8%) non-albicans Candida isolates were positive for coagulase in sheep plasma. None of the tested Candida isolates reacted positively in human plasma. These results suggest that rabbit plasma is the most appropriate medium for detection of coagulase activity in Candida spp. Variations in coagulase production by Candida spp may be related to their pathogenicity. It is concluded that the laboratory detection of coagulase activity in clinical isolates of Candida spp may help the diagnosis of Candida-related infections.
Subject(s)
Candida/enzymology , Candida/pathogenicity , Candidiasis/microbiology , Coagulase/metabolism , Animals , Candida/isolation & purification , Candidiasis/diagnosis , Coagulase/analysis , Humans , Rabbits , Sheep , Species SpecificityABSTRACT
This study was undertaken to determine the nasopharyngeal carriage prevalence of Haemophilus spp. in children aged 7-12 years in Erzurum, Turkey. Three hundred randomly selected students from three regions with different socioeconomic properties were included in the study. Nasopharyngeal swabs taken from the students were streaked into selective media for Haemophilus spp. Isolated colonies were identified by macroscopic and microscopic examination and their X and V factor needs determined. Those identified as H. influenzae were serotyped by specific capsule antisera. Haemophilus spp. were recovered from 51 (17.0%), nine (3.0%) of which were H. influenzae type b (Hib), 30 (10.0%) H. influenzae non-type b, and 12 (4.0%) H. parainfluenzae. Results were evaluated by several risk factors such as age, gender, number of siblings, siblings attending a nursery, family smoking habits and family economic status.
