Grocott-Gomori Methenamine Silver Research Articles

First confirmed case of equine pythiosis in Northern Veracruz, Mexico

A clinical case of an adult horse with invasive, ulcerative, proliferative, pyogranulomatous disease of the skin (tumor) in the shoulder region is presented. The mass had a granulomatous and crater-shaped appearance, with serosanguinous discharge and the presence of fistulas with caseous material. The tumor was removed by surgery and sent to the laboratory for diagnosis. Histopathology was performed using Grocott-Gomori methenamine silver stain. The presence of necrotic material, fibrosis, infiltrated cells, and brown-colored hyphae, characteristic of members of the genus Pythium, were observed. To identify the infecting species, conventional PCRs for the amplification of the ITS-1 was carried out. Histopathological and PCR tests confirmed infection by a Pythium insidiosum strain closely associated with previous records from the US and Central America. Our report represents the first molecularly confirmed case of equine pythiosis in Mexico.

Covid-19-Associated Mucormycosis: Histopathology of the Deadly Fungal Infection.

Introduction Many patients suffered from rhino-orbital-cerebral mucormycosis during the coronavirus disease 2019 (COVID-19) pandemic in India. Diabetes is a known risk factor of COVID-19 infection and mucormycosis. Objective The present study was done to describe the clinical spectrum and histopathological findings of mucormycosis in COVID-19 patients and their outcomes. Methods A cross-sectional study was done over a period of two and half months. The biopsy samples or scrapings from sinonasal or periorbital tissue of 38 patients were analyzed. Hematoxylin & Eosin (H&E stain) slides were evaluated along with Grocott-Gomori methenamine-silver and Periodic acid-Schiff stains to highlight the fungal elements. Results The male to female ratio was 2.5:1, and the mean age of the subjects was 53 years old. A total of 68.4% ( n = 26/38) of the patients had diabetes as a comorbidity, 84.2% ( n = 32/38) had a history of steroid intake, and 55.3% ( n = 21/38) were given supplemental oxygen during their treatment. The common presentations were nasal blockage, discharge, eye pain, headache, and altered mentation. The sites of biopsy were: nasal cavity 76.3% ( n = 29/38), periorbital fat/orbit 21.1% ( n = 8/38), maxillary sinus 15.8% ( n = 6/38) and ethmoid sinus 13.2% ( n = 5/38). In 76.3% ( n = 29/38) cases, broad, irregular, nonseptate, and right-angle branching hyphae were seen on H&E-stained tissue sections. Conclusion COVID-19 led to various complications in individuals affected by it. Mucormycosis was one such lethal complication. An early diagnosis and prompt treatment is crucial to control the progression of the disease and improve outcomes.

A Retrospective Observational Study on the Comparison of Different Diagnostic Modalities of Post-COVID Mucormycosis.

Background Mucormycosis, attributed to a group of molds known as mucormycosis, is a rare yet life-threatening fungal infection often colloquially referred to as black fungus. While its incidence notably surged during the second wave of COVID-19 infections in India, it's essential to recognize that mucormycosis was a significant concern even before the advent of the pandemic. Understanding the prevalence and characteristics of this infection in the pre-COVID era provides a crucial context for evaluating its impact and dynamics during the pandemic. Multiple diagnostic methods, such as potassium hydroxide (KOH) mount, culture, matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS), and histopathological examination (HPE), are available for identifying this lethal infection. The primary objective of this study is to ascertain the sensitivity of various diagnostic methods for mucormycosis and to analyze the comparative effectiveness of microbiological versus histopathological diagnoses. Methods We conducted a retrospective observational study spanning six months, from May 2021 to October 2021, encompassing all mucormycosis cases meeting the inclusion criteria and diagnosed via histopathological examination (HPE) in the departments of pathology and microbiology. Microbiological tests were performed prior to the histopathological examinations. Sensitivity was assessed through statistical analysis, and the relationship between microbiological and histopathological diagnoses was evaluated using the chi-square test. Results Biopsy samples of 77 patients were collected, comprising 56 male and 21 female patients. Regarding age distribution, most patients fell within the 41-60 age bracket, while the smallest proportion was over 60 years old. The sensitivity and specificity of histopathological diagnosis, confirmed with periodic acid-Schiff (PAS) and Grocott-Gomori's methenamine silver (GMS) staining, both recorded a flawless 100%. KOH mount sensitivity stood at 88.3%, while fungal culture and MALDI-TOF exhibited sensitivities of 75.3%. Histopathological analysis revealed that 17% of cases displayed minimal fungal hyphae alongside necrotic tissue, whereas 58% exhibited abundant fungal hyphae accompanied by inflammatory cells. Additionally, absolute neutrophilia was observed in 55% of cases. Conclusions In our study, histopathology and KOH mount emerged as not only compassionate but also cost-effective diagnostic tools for identifying mucormycosis. The economic aspect of these diagnostic methods is highlighted in the results section to provide a comprehensive understanding of their cost-effectiveness. Additionally, we utilized MALDI-TOF MS as a straightforward, economically viable, and expeditious method specifically for confirming the fungal subtype in mucormycosis cases. The rationale behind choosing either MALDI-TOF MS or KOH for the diagnosis is elucidated, contributing to a clearer interpretation of our diagnostic approach. Furthermore, our findings indicate that absolute neutrophilia consistently manifests in 55% of mucormycosis cases.

Preliminary Experience in Post-COVID-19 Mycoses: A Pathologist's Perspective.

Background Coronavirus disease is caused by the severe acute respiratory syndrome coronavirus-19. Because of co-morbidities and indiscriminate use of steroids and antibiotics, the incidence of opportunistic fungal infections has increased in COVID-affected individuals. Aims and objectives The aim of the study is to analyze the various tissue reaction patterns of COVID-19-associated mucormycosis in the surgical debridement specimensusing routine hematoxylin and eosin (H&E) stain and special stains like periodic acid-Schiff (PAS), Grocott-Gomori's methenamine silver (GMS), Masson trichrome (MT) and Prussian blue (PB), and to understand the pathogenesis of COVID-19 sequelae. Materials andmethods This retrospective observational study was conducted after the approval from the Institute Human Ethical Committee (IHEC) on 45 tissue samples of COVID-associated mucormycosis using routine H&E and histochemical stains such as PAS, GMS, MT, and PB. Detailed demographic profiles, clinical information, radiological findings, and relevant microbiological data in available cases, like reports on potassium hydroxide (KOH) mount preparation, and fungal culture reports on Saboraud's Dextrose Agar (SDA) medium were collected.The different histomorphological tissue reaction patterns were observed and analyzed. Results All the surgical debridement specimens from post-COVID cases had histomorphology of mucormycosis displaying broad, aseptate, ribbon-like fungal hyphae with right-angle branching (45/45). Six of the 45 cases also reveal thin, narrow septate, acute angle branching hyphae, indicating co-existing Aspergillosis (6/45). The histological tissue reaction patterns observed were categorized as extensive tissue necrosis (100%), vascular proliferation (82%), angioinvasion (58%), giant cell reaction (53%), fibrin thrombi (47%), septic thrombi and angiodestruction (40%), fungal osteomyelitis (33%), necrotizing granulomas(31%). Conclusion This study infers that post-COVID-19 associated mucormycosis, alterations in the local tissue microenvironment are found to have a favorable effect on colonizing fungi and result in destructive tissue reactions such as angioinvasion, angiodestruction, necrosis, necrotizing granulomas, suppurative inflammation, and iron pigment deposition. The spectrum of morphological changes reflects the host's immune status.

Disseminated dermatophytosis and acquired immunodeficiency syndrome:literature review and presentation of clinical experience

Introduction: Dermatophytosis are very common fungal infections caused by the fungal species Microsporum, Epidermophyton or Trichophyton, which mostly affect the skin, the interdigital region, groin and scalp. Although they do not cause serious diseases, in patients with the human immunodeficiency virus the infection manifests itself and evolves exuberantly, usually with extensive and disseminated lesions. Objective: To review the literature on dermatophytosis in people living with human immunodeficiency virus and to present the experience in clinical care in a patient living with human immunodeficiency virus with extensive and disseminated dermatophytosis. Methods: A literature review on the topic was carried out in the PubMed/National Library of Medicine – USA databases, using the keywords dermatophytosis, or dermatophytosis associated with the words AIDS, human immunodeficiency virus or immunodeficiency, from 1988–2022. The clinical experience showed a patient living with human immunodeficiency virus developing AIDS and presenting with disseminated skin lesions. Samples of the lesion were collected by scraping, which were submitted to culture and there was growth of fungi of the Trichophyton sp genus. A biopsy of the lesion was also performed using the Grocott-Gomori's Methenamine Silver stain. Results: We found 1,014 articles, of which only 34 presented a direct correlation with our paper, and were used to discuss the main themes narrated in this article. We present clinical experience in the management of a patient with human immunodeficiency virus/AIDS and low adherence to antiretroviral treatment, showing extensive and disseminated erythematous-squamous lesions with a clinical diagnosis of tinea corporis, manifesting with a clinical picture usually not found in immunocompetent patients. The diagnosis was confirmed by laboratory tests with isolation of the Trichophyton sp fungus. The patient was treated with oral fluconazole, with complete remission of the clinical picture after two months. She was also thoroughly encouraged to use the prescribed antiretroviral medication correctly. Conclusion: Dermatophytosis in patients living with human immunodeficiency virus can present extensive and disseminated forms. The antifungal treatment is quite effective, with remission of the condition. Antiretroviral therapy is an important adjuvant for better recovery of the sickness.

Histological Stains in the Past, Present, and Future.

Certain contemporary histology stains and methods are not the same as those used in the past. This progression has delved into the requirement for more precise, less complex, and efficient staining procedures. The objective of this study is to assess historical and contemporary stains and procedures, as well as the challenges surrounding their improvement. Carmine, hematoxylin, silver nitrate, Giemsa, trichome stain, Gram stain, and mauveine were among the first histological stains discovered in nature. Aside from their utility in the study of tissues at the time, they also laid the groundwork for the development of commercial dyes that are still in use today. Hematoxylin and eosin, Ziehl-Nielsen (ZN) stain, periodic acid-Schiff stain, and Grocott-Gomori methenamine silver stain are some of the most recently developed histological stains. The future of histological stains and processes appears to be influenced by technological advancements and the demand for cost-effective diagnostic approaches in the healthcare system. Thus, currently used histological stains appear to be economical, quick, and reliable tools for interpreting, archiving, and delivering essential diagnoses that could not be achieved by any other means.

Lues Maligna in an Immune-Reconstituted Patient with Retroviral Infection: A Case Report

Lues Maligna in an Immune-Reconstituted Patient with Retroviral Infection: A Case Report

Detection of Pneumocystis jirovecii by Grocott-Gomori Methenamine Silver and Indirect Immunofluorescence Assay in Chronic Obstructive Pulmonary Disease (COPD) Patients

Detection of Pneumocystis jirovecii by Grocott-Gomori Methenamine Silver and Indirect Immunofluorescence Assay in Chronic Obstructive Pulmonary Disease (COPD) Patients

Strawberry gingivitis – First sign of Wegener's granulomatosis

Wegener's Granulomatosis (WG) is an immunologically mediated rare multisystem disease characterized by necrotizing granulomatous inflammation affecting the upper and lower respiratory tracts, disseminated vasculitis and glomerulonephritis. WG oral lesions are reported to occur in 6%–13% of patients; they were an initial presenting feature in only 2% of cases. A case of strawberry gingivitis as the first sign of WG presented with erythematous and painful localized gingival enlargement affecting the maxillary anterior region of jaw in a 17-year-old boy is reported here. Correlation of histopathology with routine hematoxylin and eosin and special stains such as Grocott-Gomori's methenamine-silver nitrate and periodic acid–Schiff, peripheral blood smear, chest radiographs, Mantoux test and clinical presentation were established in diagnosing this rare entity. By the above-mentioned procedures, we arrived at the diagnosis of WG. The aim of reporting this case was to emphasize that, the dental surgeon often being the first person to examine the oral cavity, should be familiar with the typical appearance of gingiva as “strawberry gingivitis,” its clinical course, diagnostic parameters and adequate management of WG.

Genetic polymorphisms associated with treatment failure and mortality in pediatric Pneumocystosis

Data on the genetic diversity of Pneumocystis jirovecii causing Pneumocystis pneumonia (PCP) among children are still limited, and there are no available data from the Indian subcontinent, particularly associations between genotypes and clinical characteristics. A total of 37 children (62 days-12 years [median 5.5 years]) were included in this study. Pneumocystis was diagnosed by microscopy using Grocott-Gomori methenamine silver stain in 12 cases and by nested PCR using mtLSUrRNA in 25 cases. Genotyping was performed using three different genes, mitochondrial large subunit ribosomal RNA (mtLSUrRNA), dihydropteroate synthase (DHPS) and dihydrofolate reductase (DHFR). mtLSUrRNA genotype 3 and novel mutations at the gene target DHFR (401 T > C) and DHPS 96/98 were frequently observed and clinically associated with severe PCP and treatment failure. Phylogenetic analyses revealed 13 unique sequence types (STs). Two STs (i) 3-DHFR 401 T > C-DHPS 96/98 – PJ1 and (ii) 3-DHFR 401 T > C-DHPS 96- PJ3 were significantly associated with treatment failure and high mortality among PCP-positive patients. In conclusion, the present study strongly suggests the emergence of virulent P. jirovecii strains or genetic polymorphisms, leading to treatment failure and high mortality. Our study is the first of its kind from the Indian subcontinent and has highlighted the genetic diversity of Pneumocystis jirovecii among children and their clinical outcomes. These findings emphasize the need to focus more on genotypes to better understand the epidemiology of Pneumocystis pneumonia.

Epithelial Inclusions in Gallbladder Specimens Mimic Parasite Infection: Histologic and Molecular Examination of Reported Cystoisospora belli Infection in Gallbladders of Immunocompetent Patients.

Recent publications have described epithelial cytoplasmic vacuoles and inclusions incidentally noted within gallbladder epithelium and concluded that they represent coccidian parasite infection, in particular, Cystoisospora belli. We identified 8 gallbladder specimens from our institution in the past 3 years in which this diagnosis was suggested or in which similar epithelial alterations were prominent. Molecular analysis was performed on the 8 gallbladder specimens and on 3 positive control specimens: small bowel biopsies from acquired immunodeficiency syndrome patients with diarrhea. Polymerase chain reaction using primers designed to amplify an internal transcribed spacer (ITS2) in the C. belli ribosomal gene cluster was performed on the DNA samples. All 8 gallbladder specimens were negative for amplification, while a product consistent with C. belli was amplified from all 3 positive controls. Histologically, the gallbladder cytoplasmic inclusions stained diffusely positive for Grocott-Gomori's methenamine silver and Periodic acid-Schiff with diastase. In contrast, sections from a positive control small bowel biopsy demonstrated organisms that were negative for Grocott-Gomori's methenamine silver and showed a distinct capsular and punctate internal staining on Periodic acid-Schiff with diastase in various parasite forms. Together, the lack of molecular evidence of C. belli and the distinct morphologic and special staining patterns in these gallbladders compared with positive control small bowel suggest that these epithelial changes do not represent true C. belli infection. Our results suggest that gallbladders of immunocompetent patients may occasionally show epithelial changes that can morphologically mimic C. belli infection. Pathologists should be aware of this histologic variant to minimize unnecessary treatment, testing, and patient anxiety.

Primary Oral Manifestation of Histoplasmosis

A 46-year-old man consulted a general dentist with the chief complaint of pain in the mouth, of 2 months' duration. Clinically, numerous irregular nodules were observed, distributed in the edentulous alveolar maxillary and mandibular ridges. Incisional biopsy was performed, and microscopic evaluation revealed an intense chronic inflammatory infiltrate in the submucosa with a granulomatous pattern, including giant multinucleated cells and macrophages containing a fungus. Special stains, the Grocott-Gomori methenamine silver and periodic acid–Schiff were reactive for Histoplasma capsulatum. Based on the clinical presentation and microscopic features, the final diagnosis was histoplasmosis. The patient was referred to an infectious disease specialist for treatment. This case report reinforces the importance of microscopic analysis to investigate primary oral manifestations of fungal diseases to establish an accurate diagnosis and treatment for the patient.

Isolated Acute Appendicitis Caused by Aspergillus in a Patient Who Underwent Lung Transplantation: A Case Report

Invasive aspergillosis is an important cause of morbidity and mortality in patients who have undergone lung transplantation. Aspergillus infections usually involve the respiratory tract, with vascular invasion and subsequent dissemination. However, acute appendicitis associated with localized aspergillosis is rare, especially among patients who have undergone prophylaxis with voriconazole. We present a case of primary Aspergillus appendicitis diagnosed by histologic examination in a patient who underwent lung transplantation. A 51-year-old woman with dermatomyositis underwent lung transplantation for acute interstitial pneumonitis. According to our institution's protocol, the patient was treated with immunosuppressive therapy and prophylaxis with voriconazole, ganciclovir, and trimethoprim sulfamethoxazole during the post-transplantation period. Twenty-eight days after transplantation, the patient developed mild abdominal pain and paralytic ileus. There was no apparent infection sign. Abdominal computerized tomography indicated a wall defect of the appendix with multifocal fluid collection, mesenteric leave thickening, and pneumoperitoneum. These findings were consistent with perforated appendicitis, and the patient underwent an appendectomy. The histopathology examination of the resected appendix showed inflammation and abscess. Periodic acid–Schiff–positive and Grocott-Gomori methenamine silver–positive fungal hyphae with acute-angle branching were observed, demonstrating muscular invasion. A galactomannan antigen test obtained on the same day had negative results. The trough level of voriconazole was well maintained and was subsequently adjusted through monitoring of circulating drug concentration. Simultaneously, other potential sites of disseminated Aspergillus were considered and examined, but no other site of systemic Aspergillus infection was detected. Voriconazole treatment was maintained for 3 months, and no aspergillosis relapse or other invasive fungal infections were observed.

Cerebral Blastomycosis in a Tunisian Woman

Blastomycosis is a nonopportunistic fungal infection caused by Blastomyces dermatitidis. Infection of the central nervous system is an uncommon localization of this disease occurring only in 5-10% of cases. We report a new case of a 57-year-old woman, who was admitted in the neurosurgical department for severe headaches, vomiting, and a visual disturbance. Physical and biological investigations were normal. Magnetic resonance imaging leaded to find an intracranial and extracranial expansive process, measuring 42 mm in length. The microscopic examination revealed a chronic granulomatous inflammation, associating epitheloid and multinucleated giant cells containing thick walled budding yeast-like forms. Grocott-Gomori methenamine-silver (GMS) staining leaded to confirm its fungal nature and it was precisely, B. dermatitidis. The post-operative course was complicated by cerebral edema associated with an important cerebral hemorrhage. The patient died 11 days after the surgery. Cerebral involvement remains a serious but uncommon manifestation of Blastomycosis. It should be suspected in front of a granulomatous inflammation with the presence of spore, on the pathological examination. Delay in diagnosis has been reported to play a significant role in the high mortality rate.

46-Year-Old Man With Lower Back Pain

46-Year-Old Man With Lower Back Pain

PP - ORAL PARACOCCIDIOIDOMYCOSIS: A CASE REPORT

Paracoccidioidomycosis is a mucocutaneous disease that often involves the oral mucosa and may clinically resemble other infectious and neoplastic processes. The present report describes a Brazilian patient from the northeast region of the country who developed oral manifestations due to Paracoccidioides brasiliensis infection. A 59-year-old black male presented with a symptomatic ulcer, with a granular purpuric surface, which appeared four months before the appointment. The patient has been a heavy smoker and an alcohol addict for 44 years. No productive cough was observed, but the patient was much debilitated. Palpable and symptomatic submandibular lymph nodes were observed. The oral examination showed ulcerated lesions with granular surface, in the form of mulberry-like granulomatous lesions, located in the lower lip vermilion border, and on the gingival, tongue and buccal mucosae. Characteristic fungal cells with characteristic granulomatous inflammatory reaction were present in HE and Grocott-Gomori methenamine silver stain. The patient was referred to and treated at the infectology center. The whole diagnostic process was conducted by a stomatologist. The patient presented undiagnosed pulmonary involvement. This case shows that the stomatologist has an important role in the early diagnosis of this condition because adequate therapy can prevent extensive tissue destruction. Keywords: Mouth Diseases. Paracoccidioidomycosis.

Cerebral Blastomycosis in a Tunisian Woman

Blastomycosis is a nonopportunistic fungal infection caused by Blastomyces dermatitidis. Infection of the central nervous system is an uncommon localization of this disease occurring only in 5-10% of cases. We report a new case of a 57-year-old woman, who was admitted in the neurosurgical department for severe headaches, vomiting, and a visual disturbance. Physical and biological investigations were normal. Magnetic resonance imaging leaded to find an intracranial and extracranial expansive process, measuring 42 mm in length. The microscopic examination revealed a chronic granulomatous inflammation, associating epitheloid and multinucleated giant cells containing thick walled budding yeast-like forms. Grocott-Gomori methenamine-silver (GMS) staining leaded to confirm its fungal nature and it was precisely, B. dermatitidis. The post-operative course was complicated by cerebral edema associated with an important cerebral hemorrhage. The patient died 11 days after the surgery. Cerebral involvement remains a serious but uncommon manifestation of Blastomycosis. It should be suspected in front of a granulomatous inflammation with the presence of spore, on the pathological examination. Delay in diagnosis has been reported to play a significant role in the high mortality rate.

Chronic skin ulcers in a patient returning from Mexico

A 27-year-old Chilean man presented with a 3 month history of cutaneous ulcers accompanied by intermittent fever, night sweats, dry cough, and weight loss. He had recently returned from a 10-month stay at the Yucatan Peninsula, Mexico, where his clinical problems had started with a skin lesion on his forehead, which he related to an insect bite. Samples of this lesion had been diagnosed in Mexico as cutaneous leishmaniasis. Shortly before returning to Chile, he was tested and found to be positive for HIV. On admission, he had various small maculopapular lesions on his chest and several skin ulcers on his shoulder and face (fi gure, A). CT scans showed several pulmonary nodular lesions and hepatosplenomegaly. His CD4 count was 75 cells per μL and his HIV viral load was 110 000 copies per mL; serology for toxoplasmosis, syphilis, Chagas disease, and Cryptococcus neoformans antigen were negative. Scrapings of the lateral margins of a skin ulcer were taken to confi rm the previous suspicion of cutaneous leish maniasis. Giemsa stains showed numerous intracellular and extracellular oval structures with a diameter of 2–4 μm (fi gure, B). Because kinetoplasts (densely stained rod-shaped structure representing mitochondrial DNA), which are pathognomonic for Leishmania spp parasites, were absent, histoplasmosis was suspected. This suspicion was verifi ed by Grocott-Gomori methenamine silver stain showing several numerous darkly stained yeast-like elements (fi gure, C). With antifungal treatment (amphotericin B, itraconazole) the fever subsided and the patient recovered; skin ulcers healed with scarring (fi gure, D). Oral itraconazole was continued for 12 months. Currently, the patient is still on his fi rst-line antiretroviral regimen (abacavir, lamivudine, raltegravir) and has undetectable viral loads. Although his CD4 count is maintained below 100 cells per μL, he is clinically stable and asymptomatic. Histoplasma capsulatum is an endemic fungal agent causing pulmonary infection after inhalation of spores. Immuno compromised patients might have life-threatening systemic infections, including cutaneous manifestations, which are more frequently reported from Latin America. Microscopic examination of tissue samples permits rapid diagnosis and initiation of therapy. However, in specimens of chronic skin ulcers, H capsulatum cells might easily be misdiagnosed as leishmania amastigotes because both microorganisms present as intracellular objects of the same size and shape.

Low incidence of Pneumocystis jirovecii pneumonia in an unprophylaxed liver transplant cohort

Liver transplant recipients are managed with a range of immunosuppressive regimens that place them at heightened risk of life-threatening opportunistic infections such as Pneumocystis jirovecii pneumonia (PJP). No routine PJP prophylaxis is used at out institution. We reviewed the incidence of PJP in this cohort of unprophylaxed liver transplant recipients. We examined all liver transplants performed between January 2000 and January 2012 in Ireland's National Liver Transplant Centre, St. Vincent's University Hospital, Dublin. Cases were identified through a computerized database and through the histopathology and microbiology registration system. The diagnosis of PJP was confirmed by identification of Pneumocystis cysts in bronchoalveolar lavage (BAL) fluid or on autopsy specimens using Grocott-Gomori methenamine-silver nitrate or modified Wright-Giemsa staining methods. During the study period, 687 liver transplants were performed. We found 7 cases of PJP with an incidence rate of 0.84 per 1000 person transplant years. Five cases occurred within 12months of transplant with 2 cases occurring at 56 and 60months, respectively. Two cases were diagnosed at postmortem; 1 previously had negative cytology from BAL, while the other could not be bronchoscoped because of rapid deterioration in the clinical condition. Three of the 5 treated patients died. The incidence of PJP in this cohort was very low, but the case fatality rate was high. Two cases occurred well after the usual recommended period of prophylaxis. In institutions with a very low risk of infection, targeted rather than universal prophylaxis may be reasonable.

A gingival manifestation of histoplasmosis leading diagnosis

Histoplasmosis is a world-wide distributed deep mycosis caused by Histoplasma capsulatum which has been endemic in many countries. We present a case involving an immunocompetent man evidencing the necessity of a multidisciplinary approach and rational requisition of exams. The disease has started as a pulmonary disease mimicking tuberculosis, although the exams have been negative. Immunodiffusion test indicate histoplasmosis, not confirmed by culture of sputum. After days the patient was forwarded by a private doctor for evaluation of oral lesions at our Department of Stomatology. An incisional biopsy revealed a nonspecific granulomatous inflammation and the Grocott-Gomori methenamine silver stain identified scarce oval structures that could represent fungal yeast. Sampling oral lesions with swab, it was observed the typical growth of H. capsulatum on culture. This case highlights the importance of doctor's integration diagnosing histoplasmosis, while a wide spectrum of clinical manifestations should be expected. Oral lesions may be the critical manifestation leading diagnosis.