Rhino-orbital-cerebral infection by Syncephalastrum racemosusm.

Invasive rhino-sinusitis infection has been known to be caused by zygomycetes commonly belonging to the genera Rhizopus, Mucor and Rhizomucor. We report a middle aged diabetic gentleman who had invasive rhino-orbital-cerebral infection with Syncephalastrum racemosum. This genera belonging to zygomycetes group of fungi which usually causes skin and soft tissue infection but invasive infection with this fungus is rarely known.

In situ remineralisation of eroded enamel lesions by NaF rinses.

OBJECTIVE: The purpose of this pilot study was to evaluate the remineralisation of eroded enamel by NaF rinses in an intra-oral model. METHODS: Serving as their own control, subjects (N=80) participated in a randomised, four-leg (20 subjects/leg), 28-day, parallel design study. In each leg, each participant wore a customised orthodontic bracket attached to a mandibular molar that contained one tooth block having an initial erosive lesion (0.3% citric acid, pH 3.75, 2 h). Within the 28-day period, participants engaged in twice-daily brushing for 1 min with a fluoride-free dentifrice followed by 1-min rinsing with one of the following aqueous rinses: fluoride-free (0 ppm F), 225 ppm F, 225 ppm F plus functionalised ß-tricalcium phosphate (fTCP), and 450 ppm F. Following intra-oral exposure, appliances were removed and specimens were analysed using surface microhardness (SMH) and transverse microradiography (TMR). RESULTS: Statistically significant (p<0.05) remineralisation, as determined by SMH and TMR, of the eroded enamel relative to baseline occurred for each fluoride system. No significant differences in SMH were observed amongst the fluoride groups (p>0.05), however, 225 ppm plus fTCP produced 27% and 7% SMH indent length reduction relative to 225 ppm F and 450 ppm F, respectively. No significant differences in TMR were observed amongst the fluoride groups (p>0.05), however, 225 ppm F plus fTCP and 450 ppm F produced significant (p<0.05) mineral gains relative to the fluoride-free control, whilst 225 ppm F did not (p>0.05). Relative to the 225 ppm F group, the 450 ppm F and 225 ppm F plus fTCP groups produced 65% and 61% greater mineral change, respectively. CONCLUSIONS: These pilot results demonstrate this model is sensitive to fluoride and that addition of fTCP to an aqueous rinse containing 225 ppm F may provide significant remineralisation benefits. Therefore, the combination of relatively low levels of fluoride and fTCP might be an effective alternative to a high fluoride treatment for anti-erosion benefits.

Disseminated protothecosis.

Here is presented, a rare case of disseminated protothecosis in a 10-year-old boy with combined immunodeficiency, hitherto unreported from India. Even though it is difficult to diagnose clinically, observation of the sporangiospores within the sporangium in culture gives the accurate laboratory identification of Prototheca spp. In this patient, failure to eradicate the infection with amphotericin B and recurrence with olecranon bursitis along with skin lesions and splenomegaly was observed. Disseminated protothecosis in a child with combined immunodeficiency and failure to eradicate the infection with amphotericin B is reported.

Mycological profile of fungal sinusitis: An audit of specimens over a 7-year period in a tertiary care hospital in Tamil Nadu.

BACKGROUND: Fungi are being increasingly implicated in the etiopathology of rhinosinusitis. Fungal sinusitis is frequently seen in diabetic or immunocompromised patients, although it has also been reported in immunocompetent individuals. Invasive fungal sinusitis, unless diagnosed early and treated aggressively, has a high mortality rate. AIM: Our aim was to look at the mycological and clinical aspects of fungal sinusitis in a tertiary referral center in Tamil Nadu. DESIGN: This is a retrospective audit conducted on fungal culture positive sinus samples submitted to the Microbiology department from January 2000 to August 2007. Relevant clinical and histopathological details were analysed. RESULTS: A total of 211 culture-positive fungal sinusitis samples were analysed. Of these, 63% had allergic fungal sinusitis and 34% had invasive fungal sinusitis. Aspergillus flavus was the most common causative agent of allergic fungal sinusitis and Rhizopus arrhizus was the most common causative agent of acute invasive sinusitis. A significant proportion of these patients did not have any known predisposing factors. CONCLUSION: In our study, the etiology of fungal sinusitis was different than that of western countries. Allergic fungal sinusitis was the most common type of fungal sinusitis in our community. Aspergillus sp was the most common causative agent in both allergic and chronic invasive forms of the disease.

Fatal cerebral abscess caused by Cladophialophora bantiana.

Primary cerebral phaeohyphomycosis is caused by pigmented fungi that exhibit distinct neurotropism often in immunocompetent individuals. A 20-yr-old male presented with multiple brain abscess which was subsequently proven microbiologically to be due to Cladophialophora Bantiana. In spite of near total excision and appropriate antifungal agents succumbed to his illness. We report this case to highlight its rarity and high mortality in an immunocompetent host. There is no initial clinical or laboratory feature that makes a preoperative diagnosis possible and relies on microbiological confirmation.

Changing profile of prostatic abscess.

PURPOSE: To compare the clinical presentation of prostatic abscess and treatment outcome in two different time frames with regards to etiologies, co-morbid factors and the impact of multidrug resistant organism. MATERIALS AND METHODS: We retrospectively assessed the charts of 48 patients with the diagnosis of prostatic abscess from 1991 to 2005. The period was divided arbitrarily into two different time frames; phase I (1991-1997) and phase II (1998-2005). Factors analyzed included presenting features, predisposing factors, imaging, bacteriological and antibiotic susceptibility profile, treatment and its outcome. RESULTS: The mean patient age in phase I (n = 18) and phase II (n = 30) were 59.22 +/- 11.02 yrs and 49.14 +/- 15.67 respectively (p = 0.013). Diabetes mellitus was most common predisposing factor in both phases. Eleven patients in phase II had no co-morbid factor, of which nine were in the younger age group (22 - 44 years). Of these eleven patients, five presented with pyrexia of unknown origin and had no lower urinary tract symptoms LUTS. Two patients with HIV had tuberculous prostatic abscess along with cryptococcal abscess in one in phase II. Two patients had melioidotic prostatic abscess in phase II. The organisms cultured were predominantly susceptible to first line antibiotics in phase I whereas second or third line in phase II. CONCLUSION: The incidence of prostatic abscess is increasing in younger patients without co-morbid factors. The bacteriological profile remained generally unchanged, but recently multi drug resistant organisms have emerged. A worrying trend of HIV infection with tuberculous prostatic abscess and other rare organism is also emerging.

Changing profile of prostatic abscess

PURPOSE: To compare the clinical presentation of prostatic abscess and treatment outcome in two different time frames with regards to etiologies, co-morbid factors and the impact of multidrug resistant organism. MATERIALS AND METHODS: We retrospectively assessed the charts of 48 patients with the diagnosis of prostatic abscess from 1991 to 2005. The period was divided arbitrarily into two different time frames; phase I (1991-1997) and phase II (1998-2005). Factors analyzed included presenting features, predisposing factors, imaging, bacteriological and antibiotic susceptibility profile, treatment and its outcome. RESULTS: The mean patient age in phase I (n = 18) and phase II (n = 30) were 59.22 ± 11.02 yrs and 49.14 ± 15.67 respectively (p = 0.013). Diabetes mellitus was most common predisposing factor in both phases. Eleven patients in phase II had no co-morbid factor, of which nine were in the younger age group (22 - 44 years). Of these eleven patients, five presented with pyrexia of unknown origin and had no lower urinary tract symptoms LUTS Two patients with HIV had tuberculous prostatic abscess along with cryptococcal abscess in one in phase II. Two patients had melioidotic prostatic abscess in phase II. The organisms cultured were predominantly susceptible to first line antibiotics in phase I whereas second or third line in phase II. CONCLUSION: The incidence of prostatic abscess is increasing in younger patients without co-morbid factors. The bacteriological profile remained generally unchanged, but recently multi drug resistant organisms have emerged. A worrying trend of HIV infection with tuberculous prostatic abscess and other rare organism is also emerging.

Paecilomyces pyelonephritis in a patient with urolithiasis.

Fungal organisms are increasingly implicated in nosocomial urinary tract infections. Although Candida, Mucor and Aspergillus are the most commonly identified species, rare fungi are also occasionally observed to infect humans. Misidentification of the organism could result in treatment with an inappropriate antifungal agent, which could result in a florid fungal pyelonephritis. We report the occurrence of fungal pyelonephritis in a patient with stone disease secondary to Paecilomyces variotii. This case report emphasizes the need for an accurate identification of the organism and early and appropriate treatment.

Cunninghamella pneumonia in postbone marrow transplant patient: first case report from India.

Cunninghamella bertholletiae, a rare causative agent of mycosis among immunocompromised patients has been reported with increased frequency from western countries in recent years. We report a case of C. bertholletiae pulmonary infection in a 42-year-old male patient who developed graft-vs.-host disease following bone marrow transplantation. In spite of intensive antifungal chemotherapy following clinical diagnosis, he died of pulmonary failure. To our knowledge this is the first report from India and third report of post-BMT C. bertholletiae infection ever published.

Disseminated histoplasmosis.

OBJECTIVE: To study the clinical features and natural history of disseminated histoplasmosis(DH) in India. METHODS: We retrospectively analyzed the data obtained from the in-patient medical records of adults (age > 13 years) diagnosed to have DH during the period from January 1989 to December 1999. DH was diagnosed when histologically compatible intracellular organisms were present or Histoplasma capsulatum was obtained in culture from the extrapulmonary sites. RESULTS: Nineteen patients (18 male and 1 female) were diagnosed to have DH. Diabetes mellitus and HIV infection were the most common co-morbid conditions. Weight loss, fever and oropharyngeal ulcers were the commonest symptoms. Physical signs included hepatosplenomegaly, oropharyngeal ulcers and lymphadenopathy. The diagnosis was confirmed by histopathology and/or culture from the following sites: bone marrow, adrenal gland, lymph node, oropharyngeal ulcers, rectal mucosa and skin. Two patients were treated with Amphotericin B, 6 with various azoles and 3 had Amphotericin B followed by various azoles. Among the eleven treated, 7 were cured, 2 improved, 1 had a relapse and 1 patient died. CONCLUSION: DH is not uncommon in India and should be considered in the diagnosis of patients with prolonged fever, weight loss, oropharyngeal ulcers, hepatosplenomegaly, lymphadenopathy and adrenal enlargement. Correct diagnosis and treatment leads to a favourable outcome.

Epidemiology of systemic mycoses among renal-transplant recipients in India.

BACKGROUND: Systemic mycoses have a high impact on tropical renal-transplant recipients. METHODS: Data from 1,476 primary renal-transplant recipients was prospectively recorded from 1986 to 2000 at a single center. Cumulative incidence of systemic mycoses, its time of occurrence, risk factors, outcome, and postmortem findings in 30 patients with systemic mycoses were analyzed. RESULTS: A total of 110 episodes of systemic mycoses occurred in 98 patients. The fungal genera Aspergillus, Cryptococcus, and Candida constituted 61% of pathogens, 45% localizing to the lungs. Cytomegalovirus (CMV) disease caused a 5-fold and chronic liver disease a 2-fold increase in systemic mycoses. Tuberculosis (TB) with or without nocardiosis was a significant coinfection. Cyclosporine (CsA) was associated with nearly a 4-fold risk of systemic mycoses less than 6 months from the time of transplantation as compared with prednisolone+azathioprine (PRED+AZA) therapy. Overall, the probability of survival with systemic mycoses was 73.4%, 60.8%, 39.5%, and 25.6% and was 92.5%, 87.5%, 80.0%, and 75.5% without systemic mycoses at 1, 2, 5, and 10 years, respectively (P<0.0001). An extended Cox model with time-independent and dependent covariates showed greater than 15 times the risk of death among those who develop systemic mycoses. Similarly, Posttransplantation (postTX) TB+/-Nocardiosis, preTX TB, CMV disease, diabetes mellitus, PTDM, chronic liver disease (>40 months), and Pred+AZA immunosuppression (>2 years) had 3.5, 1.5, 2.9, 1.9, 1.4, 1.6, 2.3 times the risk for death, respectively, as compared with those who did not have those risk factors. CONCLUSIONS: There is a recent predominance of Aspergillus among the transplant recipients. The risk factors for systemic mycoses are CMV disease, chronic liver disease, and hyperglycemia, and TB is an important coinfection. Systemic mycoses increased in the early postTX period with CsA. The risk factors for death are systemic mycoses, CMV disease, chronic liver disease (>40 months), diabetes mellitus, and Pred+AZA immunosuppression (>2 years). Overall, the probability of survival with systemic mycoses was poor; however, survival has recently improved.

Nocardiosis in tropical renal transplant recipients.

BACKGROUND: The epidemiology of nocardiosis in the tropics among renal transplant recipients has not been reported. METHODS: An evaluation of nocardiosis for 30 yr in one of the large transplant centres in South Asian region. RESULTS: Of the 1968 patients who received primary renal allografts at Christian Medical College & Hospital, 27 patients developed nocardiosis over 30 yr. Early nocardiosis (2 yr). Seventeen patients (63%) had two or more associated post-transplant infections, of whom 10 had tuberculosis. Mortality in these patients was associated with chronic liver disease. CONCLUSIONS: Nocardiosis manifests earlier (<2 yr) in CsA treated patients who have chronic liver disease. Among renal transplant recipients of the tropics nocardiosis is a marker of a high susceptibility to tuberculosis and other infections, the association with tuberculosis is stronger in those developing early nocardiosis (<2 yr). Chronic liver disease is a risk factor for death in patients with nocardiosis especially when associated with tuberculosis. This report constitutes the largest single centre experience among renal transplant recipients.