The current classification is nomen conservandum, which means the name is authorized for use by the International Botanical Congress (IBC).The genus Candida includes about 150 different species. However, only a few are known to cause human infections. C. albicans is the most significant pathogenic species. Other species pathogenic in humans include C. auris, C. tropicalis, C. glabrata, C. krusei, C. parapsilosis, C. dubliniensis, and C. lusitaniae. The name Candida was proposed by Berkhout. It is from the Latin word toga candida, referring to the white toga (robe) worn by candidates for the Senate of the ancient Roman republic. The specific epithet albicans also comes from Latin, albicare meaning "to whiten". These names refer to the generally white appearance of Candida species when cultured. Alternative medicine
A 2005 publication noted that "a large pseudoscientific cult" has developed around the topic of Candida, with claims stating that up to one in three people are affected by yeast-related illness, particularly a condition called "Candidiasis hypersensitivity". Some practitioners of alternative medicine have promoted these purported conditions and sold dietary supplements as supposed cures; a number of them have been prosecuted. In 1990, alternative health vendor Natures Way signed an FTC consent agreement not to misrepresent in advertising any self-diagnostic test concerning yeast conditions or to make any unsubstantiated representation concerning any food or supplements ability to control yeast conditions, with a fine of $30,000 payable to the National Institutes of Health for research in genuine candidiasis.
The differentiating factor between invasive and fulminant infections is that the progress of the disease is very rapid in fulminant. The progress of the disease is so quick that it can kill a person in a month if not treated. One of the most common type of fulminant fungal infection is mucormycosis. Signs and symptoms
Individuals with the condition of fungal sinusitis mostly present with features that include facial pain and pain around the eyes, nasal congestion, rhinorrhea(running nose), headache, later there may be ophthalmoplegia (paralysis of ocular muscles). Pathophysiology
The mechanism of fungal sinusitis depends on which form, such as:

Acute fulminant form – the fungus invades into vessels causing thrombosis, necrosis with minimum inflammation 
Chronic invasive – fungal hyphae invades tissue leaving necrosis with minimal inflammation 
Granulomatous form – invasive hyphae invades tissue with inflammation and non-caseating granuloma (with foreign bodies). Saprophytic infection – growth of fungus seen on mucous crusts within sinus cavity. Sinus fungal ball – sequestration of fungal hyphae as densely tangled, and has gritty matted appearance. Eosinophil related Allergic fungal sinusitis – though not completely understood, a possible mechanism sees the protein component of fungus elicits IgE mediated allergic mucosal inflammation. Diagnosis
In terms of diagnosis, the clinical examination gives an idea about fungal sinusitis, as well as:

Suggestive clinical features include - multiple recurrent episodes, persistent pathology, and absent ability to smell (the Eustachian tube may also be affected). X-Ray - can be done if the diagnosis is not certain.