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https://www.readbyqxmd.com/read/28934824/acid-fastness-of-histoplasma-in-surgical-pathology-practice
#1
Madhu Rajeshwari, Immaculata Xess, Mehar Chand Sharma, Deepali Jain
BACKGROUND: Histoplasmosis (HP) is diagnosed by visualizing intracellular microorganisms in biopsy and/or culture. Periodic-acid Schiff (PAS) and Gomori methenamine silver (GMS) staining methods are routinely used for identification. The acid-fast property of Histoplasma was identified decades ago, but acid-fast staining has not been practiced in current surgical pathology. Awareness of the acid-fast property of Histoplasma, which is due to mycolic acid in the cell wall, is important in distinguishing Histoplasma from other infective microorganisms...
September 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28920817/intestinal-histoplasmosis-in-a-captive-reindeer-rangifer-tarandus-missouri-usa
#2
Jessica S Fortin, Michael J Calcutt, Dusty W Nagy, Keiichi Kuroki
An infection with Histoplasma capsulatum was diagnosed in a farmed reindeer in Missouri, an endemic area for histoplasmosis, localized in the intestine. The intrahistiocytic organisms were identified in tissue sections using histologic methods and confirmed by immunohistochemistry. This is the first report of histoplasmosis in a reindeer or in any deer species.
September 2017: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28903987/heat-shock-proteins-in-histoplasma-and-paracoccidioides-a-minireview
#3
Levi G Cleare, Daniel Zamith Miranda, Joshua D Nosanchuk
Heat shock proteins (hsps) are highly conserved biomolecules that are constitutively expressed and generally up-regulated in response to various stress conditions (biotic and abiotic). Hsps have diverse functions, categorizations, and classifications. Their adaptive expression in fungi indicates their significance in these diverse species, particularly in dimorphic pathogens. Histoplasma capsulatum, and Paracoccidioides species pluralis are dimorphic fungi that are the causative agents of histoplasmosis and paracoccidioidomycosis, respectively...
September 13, 2017: Clinical and Vaccine Immunology: CVI
https://www.readbyqxmd.com/read/28831671/opportunistic-invasive-mycoses-in-aids-cryptococcosis-histoplasmosis-coccidiodomycosis-and-talaromycosis
#4
REVIEW
Daniel B Chastain, Andrés F Henao-Martínez, Carlos Franco-Paredes
PURPOSE OF REVIEW: The goal of this review is to provide an update on the epidemiology, diagnosis, and treatment of opportunistic fungal infections in patients with human immunodeficiency virus (HIV) infection including Cryptococcus spp., Histoplasma spp., Coccidioides spp., and Talaromyces marneffei, formerly Penicillium marneffei. RECENT FINDINGS: In many settings, despite increasing roll out of antiretroviral therapy (ART), opportunistic invasive mycoses produce a substantial burden of disease...
August 22, 2017: Current Infectious Disease Reports
https://www.readbyqxmd.com/read/28822097/a-38-year-old-woman-with-necrotising-cervical-lymphadenitis-due-to-histoplasma-capsulatum
#5
Esther van de Vosse, Annelies van Wengen, Wendy F van der Meide, Leo G Visser, Jaap T van Dissel
CASE PRESENTATION: We analysed a 38-year-old woman with disseminated histoplasmosis for primary immunodeficiency. Her blood showed no IFN-γ response while her peripheral blood mononuclear cells (PBMCs) did. We identified IFN-γ autoantibodies of the IgG class in her serum. CONCLUSION: IFN-γ autoantibodies leading to infections were so far mainly detected in people from Asian descent, where it was found to be associated with certain HLA types. This may be the first patient of African descent, and without the typical HLA types that predispose to this problem, that produces IFN-γ autoantibodies...
August 18, 2017: Infection
https://www.readbyqxmd.com/read/28810039/distinguishing-white-dot-syndromes-with-patterns-of-choroidal-hypoperfusion-on-optical-coherence-tomography-angiography
#6
Jay C Wang, Inês Laíns, Lucia Sobrin, John B Miller
BACKGROUND AND OBJECTIVE: To compare patterns of choroidal hypoperfusion in white dot syndromes (WDS) using optical coherence tomography angiography (OCTA). PATIENTS AND METHODS: Consecutive patients with WDS were imaged with either the Zeiss AngioPlex OCT Angiography (Carl Zeiss AG, Oberkochen, Germany) or the AngioVue OCT Angiography (Optovue, Fremont, CA) from February to November 2016. Four patients with acute posterior multifocal placoid pigment epitheliopathy (APMPPE), birdshot chorioretinopathy (BCR), presumed ocular histoplasmosis syndrome (POHS), and multiple evanescent white dot syndrome (MEWDS) were selected...
August 1, 2017: Ophthalmic Surgery, Lasers & Imaging Retina
https://www.readbyqxmd.com/read/28806478/successful-stepdown-treatment-of-pulmonary-histoplasmosis-with-thrice-weekly-liposomal-amphotericin-b-in-a-hospital-associated-outpatient-infusion-centre-a-case-report
#7
P O Lewis, I Khan, P Patel
WHAT IS KNOWN AND OBJECTIVE: Amphotericin is the preferred treatment for pulmonary histoplasmosis during pregnancy. The long half-life of amphotericin supports less than daily administration. CASE SUMMARY: A 28-year-old pregnant woman diagnosed with recurrent pulmonary histoplasmosis was initiated on liposomal amphotericin 250 mg (4 mg/kg) intravenously daily. After 2 weeks, the patient was discharged and successfully received 250 mg thrice weekly at a hospital-associated outpatient infusion centre...
August 14, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28806010/blastomycosis-and-histoplasmosis-in-a-patient-with-glioblastoma-receiving-temozolomide
#8
Aiham H Jbeli, John Yu
Malignant glioblastoma multiform (GBM) is the most common primary malignancy of the brain in the U.S. Temozolomide (TMZ) is the cornerstone of management along with surgical resection and radiotherapy. Because of the reduction in the CD4+ lymphocyte count as a side effect of TMZ use, this patient population is under risk for opportunistic infections like Pneumocystis jiroveci. A male patient with newly diagnosed glioblastoma multiform presented with non-productive cough and chest pain. Before presentation, the patient received the standard therapy including surgical resection, radiation and TMZ...
October 2016: South Dakota Medicine: the Journal of the South Dakota State Medical Association
https://www.readbyqxmd.com/read/28805270/histoplasmosis-in-transplant-recipients
#9
REVIEW
Kiran Gajurel, Reshika Dhakal, Stan Deresinski
Histoplasma capsulatum is a dimorphic fungus that most often causes asymptomatic infection in the immunocompetent population. In immunocompromised patients, including solid organ transplant (SOT) and hematopoietic cell transplant (HCT) recipients, however, it is likely to cause severe life-threatening infection. Post-transplant histoplasmosis (PTH) in SOT is uncommon with an incidence of ≤ 1% and is even rarer in HCT patients. The majority of PTH in SOT is diagnosed in the first 2 years following transplantation...
August 14, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28804654/histoplasmosis-by-histoplasma-capsulatum-var-duboisii-observed-at-the-laboratory-of-pathological-anatomy-of-lom%C3%A3-in-togo
#10
Tchin Darré, Bayaki Saka, Abas Mouhari-Touré, Améyo Monique Dorkenoo, Koffi Amégbor, Vincent Palokinam Pitche, Gado Napo-Koura
Our study aimed to describe the epidemiological, clinical, and diagnostic aspects of African histoplasmosis in Togo through a descriptive and cross-sectional study on histological diagnosed African histoplasmosis in Pathology Department of Lomé from 2002 to 2016 (15 years). A total of 17 cases of African histoplasmosis were diagnosed. The sex ratio (M/F) was 1.8. The annual incidence was 1.1 cases. The mean age of the patients was 27.2 ± 0.4 years. All our patients were of social categories with a low socioeconomic level...
2017: Journal of Pathogens
https://www.readbyqxmd.com/read/28798941/lower-gastrointestinal-bleeding-secondary-to-intestinal-histoplasmosis-in-a-renal-transplant-patient
#11
Taseen A Syed, George Salem, Donald J Kastens
Histoplasmosis is the most common endemic mycosis in the United States. Symptomatic gastrointestinal histoplasmosis is a rare entity. We report a case of isolated intestinal histoplasmosis that manifested as severe lower gastrointestinal bleeding in a renal transplant patient. The patient developed hematochezia, and colonoscopy showed diffuse, extensive areas of cratered, ulcerated mucosa in the entire colon. Biopsy showed prominent mucosal and submucosal infiltrate of plump histiocytes containing intracytoplasmic yeast forms morphologically compatible with florid histoplasmosis...
2017: ACG Case Reports Journal
https://www.readbyqxmd.com/read/28797485/clinical-perspectives-in-the-diagnosis-and-management-of-histoplasmosis
#12
REVIEW
Marwan M Azar, Chadi A Hage
With increasing numbers of travelers and immunocompromised patients, histoplasmosis, caused by the dimorphic fungus Histoplasma capsulatum, has become a disease of national extent. The clinical spectrum of histoplasmosis is very wide, in terms of disease cadence, onset, distribution, and severity. A multipronged approach is recommended for diagnosis. Manifestations that are always treated include moderate to severe acute pulmonary histoplasmosis, disseminated disease, and histoplasmosis in immunocompromised individuals...
September 2017: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/28794961/feline-cutaneous-histoplasmosis-the-first-case-report-from-thailand
#13
L Larsuprom, L Duangkaew, C Kasorndorkbua, C Chen, A Chindamporn, N Worasilchai
A 2-year-old, neutered female domestic shorthaired cat presented with a history of multiple papules and nodules on pinnae, nodules on the nose, and chronic wound at the lateral surface of left radial area for four months. Skin biopsy demonstrated moderate numbers of small, oval-to-round, single-walled yeasts inside the macrophages. In addition, PCR confirmed the sequence of Histoplasma capsulatum. This is the first case report of feline cutaneous histoplasmosis in Thailand.
December 2017: Medical Mycology Case Reports
https://www.readbyqxmd.com/read/28774701/fungal-infections-in-hiv-aids
#14
REVIEW
Andrew H Limper, Antoine Adenis, Thuy Le, Thomas S Harrison
Fungi are major contributors to the opportunistic infections that affect patients with HIV/AIDS. Systemic infections are mainly with Pneumocystis jirovecii (pneumocystosis), Cryptococcus neoformans (cryptococcosis), Histoplasma capsulatum (histoplasmosis), and Talaromyces (Penicillium) marneffei (talaromycosis). The incidence of systemic fungal infections has decreased in people with HIV in high-income countries because of the widespread availability of antiretroviral drugs and early testing for HIV. However, in many areas with high HIV prevalence, patients present to care with advanced HIV infection and with a low CD4 cell count or re-present with persistent low CD4 cell counts because of poor adherence, resistance to antiretroviral drugs, or both...
July 31, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28774696/neglected-endemic-mycoses
#15
REVIEW
Flavio Queiroz-Telles, Ahmed Hassan Fahal, Diego R Falci, Diego H Caceres, Tom Chiller, Alessandro C Pasqualotto
Fungi often infect mammalian hosts via the respiratory route, but traumatic transcutaneous implantation is also an important source of infections. Environmental exposure to spores of pathogenic fungi can result in subclinical and unrecognised syndromes, allergic manifestations, and even overt disease. After traumatic cutaneous inoculation, several fungi can cause neglected mycoses such as sporotrichosis, chromoblastomycosis, mycetoma, entomophthoramycosis, and lacaziosis. Most of these diseases have a subacute to chronic course and they can become recalcitrant to therapy and lead to physical disabilities, including inability to work, physical deformities, and amputations...
July 31, 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28736209/histoplasmosis-presenting-as-laryngeal-ulcer-in-a-post-renal-transplant-male-an-unusual-case-from-india
#16
P M Jawale, H V Gulwani
Histoplasmosis has variable clinical presentation that mimics various benign and malignant lesions. It is more often associated with pulmonary lesions and disseminated form of disease. Herein, we report a rare case of localized laryngeal histoplasmosis in a 62-year-old Indian man who presented with hoarseness of voice and dysphagia. Post-renal transplant, he was on immunosuppressive drugs for last three years. Laryngoscopy revealed an ulceroproliferative growth at base of tongue, which was extending upto the pyriform fossa...
July 20, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28725444/post-tuberculous-fibrosing-mediastinitis-a-review-of-the-literature
#17
REVIEW
Zhe Wu, Hannah Jarvis, Luke S Howard, Corrina Wright, Onn Min Kon
Fibrosing mediastinitis (FM) is a rare disease where there is thickening of the fibrous tissue in the mediastinum. While histoplasmosis is the the most common recognised cause, the link with tuberculosis (TB) has been rarely documented. We review the link between TB and FM, and describe a case of probable TB-related FM.Our case is of a 74-year-old man who presented with breathlessness 3 years after fully treated TB. Scans revealed a calcified soft tissue mass within the mediastinum, and a diagnosis of fibrosing mediastinitis resulting in pulmonary hypertension was made...
2017: BMJ Open Respiratory Research
https://www.readbyqxmd.com/read/28719316/high-mortality-and-coinfection-in-a-prospective-cohort-of-human-immunodeficiency-virus-acquired-immune-deficiency-syndrome-patients-with-histoplasmosis-in-guatemala
#18
Blanca Samayoa, Monika Roy, Angela Ahlquist Cleveland, Narda Medina, Dalia Lau-Bonilla, Christina M Scheel, Beatriz L Gomez, Tom Chiller, Eduardo Arathoon
Histoplasmosis is one of the most common and deadly opportunistic infections among persons living with human immunodeficiency virus (HIV)/acquired immune deficiency syndrome in Latin America, but due to limited diagnostic capacity in this region, few data on the burden and clinical characteristics of this disease exist. Between 2005 and 2009, we enrolled patients ≥ 18 years of age with suspected histoplasmosis at a hospital-based HIV clinic in Guatemala City. A case of suspected histoplasmosis was defined as a person presenting with at least three of five clinical or radiologic criteria...
July 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28717672/coccidioidomycosis-a-cause-of-sarcoidosis
#19
Tim Kuberski, Isaac Yourison
BACKGROUND: Sarcoidosis is a granulomatous disease of unknown etiology and coccidioidomycosis is a granulomatous fungal infection endemic to the southwestern United States. Clinical observations on patients with sarcoidosis and coccidioidomycosis simultaneously led to the hypothesis that sarcoidosis can be caused by the fungus Coccidioides. METHODS: Two patients with sarcoidosis and coccidioidomycosis were studied, one prospectively (ie, a patient with sarcoidosis was predicted to develop coccidioidomycosis) and the other retrospectively (ie, a patient with coccidioidomycosis develops sarcoidosis)...
2017: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/28710196/disseminated-histoplasmosis-presenting-as-multiple-oral-ulcers
#20
Nicholas Hendren, Christina Yek, Jason Mull, James B Cutrell
A 61-year-old female with a history of advanced HIV disease and chronic hepatitis B was presented with an 8-week history of painful oral ulcers. She appeared systemically well but examination revealed multiple well-demarcated clean-based ulcers on the tongue and hard palate. Biopsy of one of the lesions showed numerous histiocytes containing intracellular yeast forms consistent with Histoplasma capsulatum var. capsulatum Fungal blood cultures subsequently grew H. capsulatum var. capsulatum, confirming a diagnosis of disseminated histoplasmosis...
July 14, 2017: BMJ Case Reports
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