Identification of Candida dubliniensis among oral yeast isolates from an Italian population of human immunodeficiency virus-infected (HIV+) subjects.

Candida dubliniensis, an emerging oral pathogen, phenotypically resembles Candida albicans so closely that it is easily misidentified as such. The aim of the present study was to evaluate the usefulness of two phenotypic methods, growth at 45 degrees C and 2,3,5-triphenyltetrazolium chloride (TTC) reduction, for confirming presumptive identification of C. dubliniensis and C. albicans by colony color on CHROMagar Candida (CAC) medium. A combination of these methods was used to establish the prevalence of oral C. dubliniensis in an Italian population of 45 human immunodeficiency virus (HIV)-infected subjects. Twenty-two samples (48.9%) were positive for yeasts on CAC medium producing a total of 37 fungal isolates. The colony color and 45 degrees C growth ability test correctly identified all C. dubliniensis and C. albicans isolates (5/37, 13.5%, and 16/37, 43.2%, respectively), while assessment of TTC reduction misidentified one C. albicans isolate. The isolation rate of C. dubliniensis was 11.1% (5/45 patients). All of the C. dubliniensis isolates were highly susceptible to fluconazole (MIC = 0.5 microg/ml). The combination of CAC medium screening with growth at 45 degrees C and TTC reduction tests may represent a simple, reliable and inexpensive identification protocol for C. dubliniensis.

Fluconazole susceptibility of Italian Candida dubliniensis clinical isolates determined by reference and simplified tests.

Candida dubliniensis ia an opportunistic pathogen mainly associated with oral candidiasis in human immunodeficiency virus (HIV)-infected individuals. We recently recovered the first Italian clinical isolates of C. dubliniensis from the oral cavities of seven HIV-seropositive subjects. The in vitro susceptibility to fluconazole (FLCZ) of these isolates was determined according to the National Committee for Clinical Laboratory Standards (NCCLS) M27-A broth microdilution method for yeasts. All seven isolates of C. dubliniensis were susceptible to FLCZ (MICs < or =0.5 microg/ml). Results of this reference method were compared to those obtained with simplified tests, more adapted to routine evaluation in hospital laboratories. Fungitest and Sensititre YeastOne colorimetric microplate-based methods have been evaluated. The agar disk diffusion method has also been tested on two different media: RPMI 1640-2% glucose and High Resolution-2% glucose-0.5 microg/ml methylene blue. All of the simplified methods tested were able to correctly identify FLCZ-susceptibility of this group of Italian C. dubliniensis isolates.

[Current trends in the diagnosis and therapy of anal pruritus. Review of 238 cases]. / Attuali orientamenti di diagnosi e terapia del prurito anale. Revisione di 238 casi.

Perianal pruritus may be caused by a variety of factors. Of these, the most frequently occurring are proctological, infections, dermatological, dietary, and systemic. The results of a study carried out on 238 patients from 1980 to 1984 are reported. The survey was carried out with the aim of defining the frequency of pruritus in relation to the triggering cause, to sex and to age. It is emphasised that diagnosis is often difficult and requires the measurement of the following parameters: blood glucose levels, blood, nitrogen levels, ESR, haemochrome, hepatic functions, in addition to a gynaecological examination, analysis of faeces, proctocolonoscopy, skin biopsy and other tests. These are carried out to determine whether anal pruritus is a symptom of a systemic disease, or whether it is brought about by local causes. Treatment measures adopted are reported. Treatment is mainly symptomatic and aetiological for cases caused by local disturbances.

[Endoscopic and bioptic diagnosis of primary gastric lymphomas: 33 personal cases]. / Diagnosi endoscopico-bioptica dei linfomi gastrici primitivi: trentatré osservazioni personali.

The Authors have diagnosed by endoscopy and biopsy 33 primitive gastric lymphomas (6,7% of all malignant gastric tumors diagnosed over 6 years). Endoscopic observation alone diagnosed lymphoma in 63,6% of the cases. Exact diagnosis was made in all cases of polymorphic or multi-ulcerated lesions. The observation of a single ulcerated or ulcero-vegetative lesion (30,3%) suggested diagnosis of carcinoma. A false negative diagnosis of inflammatory pathology was made in 6,1% of the cases. Biopsy gave correct diagnosis in 69,7%. Highest percentage of positive biopsies was obtained in both single and multiple ulcerated lesions (88,2%), while infiltrating lesions provided positive biopsies in 50% of the cases. Endoscopy together with biopsy gave correct diagnosis in 90,9%. In fact, endoscopic diagnosis of lymphoma was confirmed after resection in 7 cases even if the individual biopsies showed superficial gastritis. The Authors believe that correct endoscopic study of primitive gastric lymphomas is based on knowledge of the various morphologies of the tumor and on a systematic performance of a large number of biopsies of both the lesions and surrounding mucosa.