The characteristics (such as morphology and colour) of the colonies may allow initial diagnosis of the organism causing disease symptoms. Respiratory, gastrointestinal, and esophageal candidiasis require an endoscopy to diagnose. For gastrointestinal candidiasis, it is necessary to obtain a 3–5 milliliter sample of fluid from the duodenum for fungal culture. The diagnosis of gastrointestinal candidiasis is based upon the culture containing in excess of 1,000 colony-forming units per milliliter. Classification
Candidiasis may be divided into these types:

Mucosal candidiasis
Oral candidiasis (thrush, oropharyngeal candidiasis)Pseudomembranous candidiasis
Erythematous candidiasis
Hyperplastic candidiasis
Denture-related stomatitis — Candida organisms are involved in about 90% of cases
Angular cheilitis — Candida species are responsible for about 20% of cases, mixed infection of C. albicans and Staphylococcus aureus for about 60% of cases. Median rhomboid glossitis
Candidal vulvovaginitis (vaginal yeast infection)
Candidal balanitis — infection of the glans penis, almost exclusively occurring in uncircumcised males
Esophageal candidiasis (candidal esophagitis)
Gastrointestinal candidiasis
Respiratory candidiasis
Cutaneous candidiasis
Candidal folliculitis
Candidal intertrigo
Candidal paronychia
Perianal candidiasis, may present as pruritus ani: 309 
Candidid
Chronic mucocutaneous candidiasis
Congenital cutaneous candidiasis
Diaper candidiasis: an infection of a childs diaper area: 309 
Erosio interdigitalis blastomycetica
Candidal onychomycosis (nail infection) caused by Candida
Systemic candidiasisCandidemia, a form of fungemia which may lead to sepsis
Invasive candidiasis (disseminated candidiasis) — organ infection by Candida
Chronic systemic candidiasis (hepatosplenic candidiasis) — sometimes arises during recovery from neutropenia
Antibiotic candidiasis (iatrogenic candidiasis)

Prevention
A diet that supports the immune system and is not high in simple carbohydrates contributes to a healthy balance of the oral and intestinal flora. While yeast infections are associated with diabetes, the level of blood sugar control may not affect the risk.
Wearing cotton underwear may help to reduce the risk of developing skin and vaginal yeast infections, along with not wearing wet clothes for long periods of time. For women who experience recurrent yeast infections, there is limited evidence that oral or intravaginal probiotics help to prevent future infections. This includes either as pills or as yogurt.Oral hygiene can help prevent oral candidiasis when people have a weakened immune system. For people undergoing cancer treatment, chlorhexidine mouthwash can prevent or reduce thrush. People who use inhaled corticosteroids can reduce the risk of developing oral candidiasis by rinsing the mouth with water or mouthwash after using the inhaler. People with dentures should also disinfect their dentures regularly to prevent oral candidiasis. Treatment
Candidiasis is treated with antifungal medications; these include clotrimazole, nystatin, fluconazole, voriconazole, amphotericin B, and echinocandins. Intravenous fluconazole or an intravenous echinocandin such as caspofungin are commonly used to treat immunocompromised or critically ill individuals.The 2016 revision of the clinical practice guideline for the management of candidiasis lists a large number of specific treatment regimens for Candida infections that involve different Candida species, forms of antifungal drug resistance, immune statuses, and infection localization and severity. Gastrointestinal candidiasis in immunocompetent individuals is treated with 100–200 mg fluconazole per day for 2–3 weeks. Localized infection
Mouth and throat candidiasis are treated with antifungal medication. Oral candidiasis usually responds to topical treatments; otherwise, systemic antifungal medication may be needed for oral infections.