Received 28 March 2016; accepted 24 May 2016; published 27 May 2016
Candida is widespread exit on an animate object in nature, which is normal commensal of humans, and inhabits even in the inner of human body like the gastrointestinal tract, the female genital tract, etc.  . Candidiasis can present a wide variety of symptoms which include fatigue, allergies, gastrointestinal system, neurological system, genito-urinary system, respiratory system, skin, and so on. As the first case of candidiasis has been described in debilitated patients, the advent of candida species as common human pathogens, dates to the introduction of modern therapeutic approaches that suppress normal host defense mechanisms  . Numerous reviews of cases of candidiasis have identified the following predisposing factors or conditions: antibacterial agents  , indwelling intravascular catheters  , hyperalimentation fluids  , indwelling urinary catheters  , parenteral glucocorticoids  , respirators  , neutropenia  , abdominal and thoracic surgery  , gastroesophageal reflux   , cytotoxic chemotherapy, immunosuppressive agents for organ transplantation  , severe burns   , low-birth-weight neonates  , using illegal drugs  , HIV infection  , and so on. Of these relatively recent advances, the most important are the use of antibacterial agents that alter the normal human microbial flora and allow nonbacterial species to become more prevalent in the commensal flora, and the host’s immune response is comprised  . Candidiasis is the most common opportunistic fungal infection as a result of both the ubiquity of the organisms and the increasing number of patients with the above mentioned risk factors for infection with these organisms  . Candida species cause a wide spectrum of diseases ranging in severity from localized mucous membrane infection to life-threatening disseminated disease  . Local infections are often related to overgrowth of Candida as a result of changes in the normal flora. In an immunosuppressed host, especially a patient with neutropenia or AIDS, general fungal infection is common  . At present, the medical therapeutics is commonly used. Candida species are now among the most common nosocomial pathogens, which have a trend of increase  . In the United States, these species are the fourth most common isolates from the blood of hospitalized patients  .
2. Candidiasis Treatment of the Immune Changing Patients
So the immune changing patient should not suffer long period of expensive treatment and high expenditure. What is more, in the land of the blind, the one-edged man is king. In the area of antibiotics, when penicillin is lost its corona after the appearing of imipenem and cilastatin sodium to treat severe infection disease in no more than two hundred years, imipenem and cilastatin sodium has lost its corona after the appearing of fungus in no more than several decades. We may conclude even if the antibiotics or antifungal drug not to perplex us, another new microorganism will be appeared, because human body is perfect to culture life apart from ourselves. In fact, with the introduction of antifungal agents, the causes of Candida infections shifted from an almost complete dominance of C. albicans to the common involvement of C. glabrata and the other species  . The non-albicans species now account for approximately half of all cases of candidemia and hematogenously disseminated candidiasis   . So, if the nystatin could treat some esophageal candidiasis patients, the guideline should not advise fluconazole is the primary drug. CDC also noted that some OPC (Oropharyngeal Candidiasis, Esophageal Candidiasis) patients can be treated by clotrimazole troches or lozenges and swishing and swallow of nystatin suspension.
3. Candidiasis Treatment of the Agranulocytosis
The excess expenditure condition also appear in agranulocytosis, for example primary malignant hematologic disease, myelodysplastic syndrome, aplastic anemia, rare aleukemic leukemia, some acute lymphoid leukemia, some lymphomas of bone marrow, tumor which caused by radiotherapy or chemotherapy and so on (Table 1)  . We should pay attention to these phenomenon that once these patients’ primaries diseased have been cured, their immune condition is also changing to normal, and should be treated as immune normal people  .
Table 1. Common pathogen of candidiasis caused by immune deficient.
4. Candidiasis Treatment of Chemotherapy or After-Transplant
Another immune changing disease is after-transplant, whether it is liver, pancreatic, small bowel, multivisceral organ, thoracic organ, stem cells, or other organ. These patients have to treated by corticosteroid, ciclosporin, or other immune inhibition agents, though the amount of their white cells may be normal, if treated by guidelines of community acquired Pneumonia, hospitals acquired pneumonia or lower respiratory tract infections, they have little change to live  .
If the patients have abnormal of quantity and quality of white blood, we should treat they as long term immune deficient patients. If the pathogens of candidiasis have been recovered, we should them as long term immune patient, because their immune conditions are normal and they are health people at least a short period. The guideline of American Thoracic Society about fungal infections in adult pulmonary and critical care patients has already pay attention to the difference between immune deficiency patients and un-immune deficiency patients in respiratory system  . Lung nodules and majority bronchial calculus of healthy immune persons are not recommended general antifungal therapy.
If their pathogen disease could not be recovered, they should be name long term immune deficient patients. Therefore, the after-transplantation patients have received ciclosporin or other immune deficient drug, though the amounts of white blood cells are normal, they immune are comprised, so we should be treated positively.
Previous guidelines about candidiasis are mainly based on the long term immune deficient patients who are the main and severe group    , and neglected these temporary immune deficient, and the patients’ immune condition could be changed with the treatment. The long term immune deficient patients are mainly agranulocytosis, ill-conditioned of white cells disease (Table 1).
The temporary immune deficient patients are mainly suffered antibacterial agents, gastroesophageal reflux, severe burns, and invasive treatment, which including indwelling intravascular catheters, hyperalimentation fluids, indwelling urinary catheters, respirators, using illicit IV drugs, etc. The difference between long term and short term should not be defined by time completed. Once the risk factors are corrected they should be named short term, once the risk factors are not corrected they should still name long term. Besides, we could difference the immune deficient patients to general deficient patients and local deficient patients too (Table 1). The meaning is the general immune deficient patients mostly are long term immune deficient patients, and the local immune deficient patients mostly are short immune deficient patients. Apart from the antibiotic abuse and severe burns could be sorted by both of the two groups (Table 1). The goals of these names are going to be remaining the clinical doctors paying attention to the changing immune condition about candidiasis easily and usually. These may guide the clinical doctors about the candidiasis to a preliminary evaluation. If the candidiasis is caused by long term immune deficient or general immune deficient factor, should be given heaven hit, vice versa. Once the immune deficient condition is changed, the treatment vigor should be adjusted too.
Different with HIV patients, who suffered immune deficient for whole life at least from the now point, the short term immune deficient patients would be immune changing patients. The immune changing patients are these patients who suffered immune comprised and fungal, once their pathogenic condition is corrected, they should not treated as the immune deficient patients, who treated by antifungal drug for so long. At present, we have not pay attention to these patients completely. So they have been excessive treatment usually.
The immune changing principle is easy to understand, and the ignored diseases are not fatal illness, was overshadowed by excessive medical treatment. In addition, it could be hard to make out fateful findings, and cannot put out series high-quality articles if only study this, so there are few in-depth researches in this area, except several reports in infamous magazine of developing countries. Therefore, this is not valued by people when searching literature or formulates clinical guidelines.
The immune deficient patients of candidiasis include the long term immune deficient patients, temporary immune deficient patients and immune changing patients. The patients’ immune condition could change with time, treatment, age, and so on. Saving the life of patients is important, however, we should not arrange excess treatment, and not be careless about the cost and the backlash of anti-fungal drug resistance. The treatment of candidiasis should pay attention to the immune changing patient.
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