This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Mycology, Subject name: Microbiology
Renauld Braude phenomenon is seen in - 
Select and explain. 
A. Candida albicans, B. Candida pscittasi, C. Histoplasma, D. Cryptococcus
A: Candida albicans
Answer: A: Candida albicans 
Explanation: Ans. is 'a' i.e., Candida albicans Candida o Candida albicans is the most common cause of mucosal candidiasis. o All Candida species pathogenic for humans are also encountered as commensals of humans, particularly in the mouth, stool and vagina. o They grow rapidly on simple media as oval budding cells at 25deg to 37o C. o In tissue, both yeasts and pseudohyphae are present, o Candida albicans is differentiated by other Candida: It forms true hyphae (mycelia) or germ tubes when grown in serum. It forms thick walled large spores called chlamydospores when grown on corn meal agar. It is dimorphic. o A rapid method of identifying Co. albicans is based on its ability to form germ tubes within two hours when incubated in human serum at 37degC - Reynolds - Braude phenomenon {Also known as germ tube test).