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Negroni R, Maiolo E, Arechavala A, Santiso G, Bianchi MH. [Clinical cases in Medical Mycology: case no. 25]. Rev Iberoam Micol 2007; 24:79-81. [PMID: 17592882 DOI: 10.1016/s1130-1406(07)70019-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Negroni R, Maiolo E, Arechavala A, Fink V, Silguero N. [Clinical cases in medical mycology. Case No. 27]. Rev Iberoam Micol 2007; 24:174-5. [PMID: 17604443 DOI: 10.1016/s1130-1406(07)70039-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Negroni R, Musella R, Maiolo E, Arechavala A, Rojas H. [Clinical cases in medical mycology. Case No. 26]. Rev Iberoam Micol 2007; 24:171-3. [PMID: 17604442 DOI: 10.1016/s1130-1406(07)70038-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Musella RM, Castagnino JP, Maiolo E, Negroni R, Arechavala A, Santiso G. [Clinical cases in Medical Mycology: case no. 24]. Rev Iberoam Micol 2007; 24:75-8. [PMID: 17592881 DOI: 10.1016/s1130-1406(07)70018-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Negroni R, Robles AM, Helou S, Arechavala A, Bianchi M, Duran A. MICETOMAS EN EL HOSPITAL DE INFECCIOSAS FRANCISCO JAVIER MUNIZ DE LA CIUDAD DE BUENOS AIRES. ARGENTINA. REVISTA DE PATOLOGIA TROPICAL 2007. [DOI: 10.5216/rpt.v27i2.17161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Fulgenzi A, Negroni R, Maiolo E, Arechavala A, Santiso G, Bianchi MH. [Clinical cases in Medical Mycology. Case No. 23]. Rev Iberoam Micol 2007; 23:251-3. [PMID: 17388654 DOI: 10.1016/s1130-1406(06)70056-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Calanni L, Schmidt G, Negroni R, Arechavala A, Santiso G. [Clinical cases in Medical Mycology. Case No. 22]. Rev Iberoam Micol 2007; 23:249-50. [PMID: 17388653 DOI: 10.1016/s1130-1406(06)70055-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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58
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Negroni R, López Daneri G, Robles AM, Arechavala A, Bianchi MH, Santiso G. [Clinical cases in medical mycology. Case no. 21]. Rev Iberoam Micol 2006; 23:119-21. [PMID: 16854193 DOI: 10.1016/s1130-1406(06)70029-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Negroni R, Arechavala A, Maiolo E. [Clinical cases in medical mycology. Case no. 20]. Rev Iberoam Micol 2006; 23:116-8. [PMID: 16854192 DOI: 10.1016/s1130-1406(06)70028-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Negroni R, Arechavala A. [Coccidioidomicosis through history]. Rev Argent Microbiol 2006; 38:31. [PMID: 16784131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
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61
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Negroni R, López Daneri G, Arechavala A, Bianchi MH, Robles AM. [Clinical and microbiological study of mycetomas at the Muñiz hospital of Buenos Aires between 1989 and 2004]. Rev Argent Microbiol 2006; 38:13-8. [PMID: 16784127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023] Open
Abstract
This work presents clinical, microbiological and outcome data collected from 76 patients with mycetomas at the Muñiz Hospital from 1989 to 2004. Forty-nine patients were male and 27 female; the mean age was 43.4 years. The majority of the patients acquired the infection in Argentina: the most affected provinces were Santiago del Estero with 31 cases, and Chaco with 11; 8 cases came from other countries (Bolivia 6 and Paraguay 2). The mean evolution of the disease was 9.2 years. The most frequently observed sites were: feet 63 cases, ankles 3, and knees 2. Forty-eight patients had bone lesions and 5, adenomegalies. The following etiological agents were identified: Madurella grisea 29 cases, Actinomadura madurae 26, Scedosporium apiospermum 5, Nocardia brasiliensis 5, Acremonium spp. 4 (Acremonium falciforme 2, Acremonium kiliense 1, Acremonium recifei 1), Madurella mycetomatis 3, Fusarium solani 2, Nocardia asteroides 1 and Streptomyces somaliensis 1. The main drugs used in the treatments were ketoconazole and itraconazole for maduromycotic mycetomas, and cotrimoxazole associated with ciprofloxacin or amikacin for actinomycetic mycetoma. Six patients had to undergo amputation, 25 cases achieved complete clinical remission and 34 showed remarkable improvement.
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Negroni R, López Daneri G, Arechavala A. [Clinical cases in medical mycology. Case No. 18]. Rev Iberoam Micol 2005; 22:177-8. [PMID: 16309358 DOI: 10.1016/s1130-1406(05)70037-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Negroni R, López Daneri G, Maiolo E, Arechavala A. [Clinical cases in medical mycology. Case No. 19]. Rev Iberoam Micol 2005; 22:179-80. [PMID: 16309359 DOI: 10.1016/s1130-1406(05)70038-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Negroni R, Arechavala A, López Daneri G. [Clinical cases in Medical Mycology. Case No. 15]. Rev Iberoam Micol 2005; 22:62-3. [PMID: 15813688 DOI: 10.1016/s1130-1406(05)70011-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Negroni R, Arechavala A, López Daneri G. Problemas clínicos en Micología Médica: problema n° 14. Rev Iberoam Micol 2005; 22:60-1. [PMID: 15813687 DOI: 10.1016/s1130-1406(05)70010-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Negroni R, Arechavala A, Bonvehí P. [Clinical problems in medical mycology: problem no. 12. Disseminated coccidioidomycosis]. Rev Iberoam Micol 2004; 21:213-5. [PMID: 15709805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
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Negroni R, Arechavala A. [Clinical problems in medical mycology: problem no. 14. Pulmonary hydatid cyst]. Rev Iberoam Micol 2004; 21:216-7. [PMID: 15709806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
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Buscemi L, Arechavala A, Negroni R. [Study of acute vulvovaginitis in sexually active adult women, with special reference to candidosis, in patients of the Francisco J. Muñiz Infectious Diseases Hospital]. Rev Iberoam Micol 2004; 21:177-81. [PMID: 15709796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
Abstract
The results of microbiological vaginal secretions samples obtained from 749 women (from July 2001 to July 2002) were studied in the Bacteriology Unit of the Francisco Javier Muñiz Hospital from Buenos Aires. All patients suffered acute vulvovaginitis were child bearing and sexually active women, 334 of them were HIV-positive. The following are the results of the microbiological studies: Lactobacillus spp 50.6%, Gardnerella vaginalis 25.6%, Candida spp 17.4%, Trichomonas vaginalis 5.3%, Neisseria gonorrhoeae 0.3% and B group Streptococcus 0.8%. Candida vaginitis was significantly more frequent in HIV-positive patients, (21.6% vs 14%; p = 0.0086); meanwhile, trichomoniasis was less common although the difference was not statistically significant (3.6 vs 6.7%, p = 0.0810). The following Candida species were isolated in this study: Candida albicans 76.8%, Candida glabrata 15.6%, Candida parapsilosis 2.9%, Candida tropicalis 1.5% and Candida krusei 0.7%. Eight cases (6.2%) of vaginitis were produced by two Candida species (C. albicans and C. glabrata), and in three cases (2.17%) Saccharomyces cerevisiae were isolated. Five women suffering acute vaginitis with Candida spp presented another etiologic agent of vaginal infection, three cases T. vaginalis and two cases G. vaginalis. The following are some of the most important findings of this study: 1) Half of the patients presented a normal microbial biota; 2) Candida spp vaginitis was significantly more frequent among HIV-positive women; 3) we observed a high incidence of Candida glabrata infections (15.9%), 4) 6.2% of vaginal candidiasis were caused by more than one Candida species and, 5) the susceptibility pattern of C. albicans and C. glabrata isolates against fluconazole was similar to the one observed in other studies. The majority of C. albicans isolates were susceptible to fluconazole (MIC90 = 0.5 microg/ml) meanwhile C. glabrata strains were much less susceptible to this drug (MIC50 and MIC90 = 32 microg/ml).
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Negroni R, Robles AM, Arechavala A. [Clinical problems in medical mycology: problem no.11. Generalized dermatophytosis with subcutaneous nodules]. Rev Iberoam Micol 2004; 21:155-6. [PMID: 15709793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
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Negroni R, Arechavala A, Bonvehí P. [Clinical problems in medical mycology: problem no. 10. Cryptococcosis]. Rev Iberoam Micol 2004; 21:153-4. [PMID: 15709792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
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Negroni R, Abbatte E, Arechavala A, Bonvehí P. [Clinical cases in Medical Mycology. Case No. 7]. Rev Iberoam Micol 2004; 21:44-6. [PMID: 15458364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
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Negroni R, Helou SH, Petri N, Robles AM, Arechavala A, Bianchi MH. Case Study: Posaconazole Treatment of Disseminated Phaeohyphomycosis Due toExophiala spinifera. Clin Infect Dis 2004; 38:e15-20. [PMID: 14727230 DOI: 10.1086/380840] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2003] [Accepted: 10/01/2003] [Indexed: 11/03/2022] Open
Abstract
A 41-year-old woman with no known immunosuppression experienced a 12-year period of a relapsing phaeohyphomycosis. Despite administration of multiple courses of therapy with standard antifungals, sustained clinical remission was not achieved. A partial response was seen initially with the combination of itraconazole and flucytosine therapy, but the patient did not respond to subsequent treatment. During the patient's pregnancy, the mycosis became disseminated, with lymphadenopathy and fever, and was considered life threatening. Despite receipt of parenteral amphotericin B therapy, the patient did not show a clinical response. After premature delivery by cesarean section, treatment with oral posaconazole suspension (800 mg/day) was started. The patient's condition improved within 1 week after initiating treatment; therapy was continued for 13 months. During posaconazole treatment, the patient showed a complete clinical response, with negative results of fungal cultures.
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Metta HA, Corti ME, Negroni R, Helou S, Arechavala A, Soto I, Villafañe MF, Muzzio E, Castello T, Esquivel P, Trione N. [Disseminated cryptococcosis in patients with AIDS. Clinical, microbiological, and immunological analysis of 51 patients]. Rev Argent Microbiol 2002; 34:117-23. [PMID: 12415893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
Abstract
In the context of HIV infection, cryptococcal meningitis is the most common mycosis threatening the patient's life. We conducted a retrospective evaluation to determine the epidemiological, microbiological, immunological and clinical characteristics of disseminated cryptococcosis in 51 hospitalised HIV seropositive patients. All the individuals (n = 51) presented reactive serology for HIV (ELISA and/or Western blot) and none fulfilled strict HAART treatment, previous to the opportunistic infection. CD4+ lymphocyte T counts showed levels between 361 and 0 cells/microliter (mean = 45). All patients but one had counts lower than 100 cells/microliter. Cryptococcosis presented as unique episode in 35 patients (68.6%) and in 16 as relapse (31.3%). In all of them we detected central nervous system involvement. The induction treatment was carried out with amphotericin B (AMB), continued with maintenance therapy with fluconazole. Lethality rate was 36.7%, slightly superior among patients in relapse (40%) compared to those who presented a first episode of the mycosis (35.2%). In those individuals for whom data were available, 65.2% of blood cultures, 94.1% of CSF cultures and 79.06% of microscopic CSF examination with India ink were positive. Titers of Cryptococcus neoformans capsular antigen in CSF > or = 1/1000 were found in 36.1% and > or = 1/1000 in 73.6% of serum samples. In conclusion, manifestations and severity of disseminated cryptococcosis continue maintaining the characteristics of half a decade behind, in those patients who are not treated with HAART. Neurological involvement existed in all patients of this cohort. Treatment is not able to modify the parameters of mortality seen in previous communications. Diagnostic methods applied in this study are in accordance with those in the bibliography.
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Quindós G, Alonso-Vargas R, Helou S, Arechavala A, Martín-Mazuelos E, Negroni R. [Evaluation of a new chromogenic medium (Candida ID) for the isolation and presumptive identification of Candida albicans and other medically important yeasts]. Rev Iberoam Micol 2001; 18:23-8. [PMID: 15482010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/30/2023] Open
Abstract
Candidiasis is a frequent human infection caused mainly by Candida albicans. However, other species are emerging as important pathogens, as Candida glabrata, Candida parapsilosis, Candida tropicalis, Candida krusei or Candida guilliermondii. Rapid identification of clinical isolates could facilitate diagnosis and treatment. Candida ID (bioMerieux, Spain) is a new medium for the isolation and presumptive identification of yeasts: C. albicans grows as blue colonies, and C. tropicalis, C. guilliermondii, Candida kefyr and Candida lusitaniae as pink ones. The utility of Candida ID was evaluated with more than 700 clinical isolates and type culture collection strains from different genera including Candida, Cryptococcus, Saccharomyces, and Rhodotorula. Presumptive identification was confirmed by germ tube test, microscopic morphology and chlamydoconidia production on corn meal agar and carbohydrate assimilation on API-ATB ID 32C or Vitek (bioMerieux). Growth on Candida ID was rapid (18-24 h) for most of the yeast strains tested. Sensitivity and specificity of identification of C. albicans was significantly high (>98%), since a very low number of isolates were found to be false negative or false positive. A better result was obtained for species growing as pink colonies (>99.5%). Detection of different species of medical important yeasts was easy with Candida ID, as perfectly distinct colors and textures of colonies were observed on this medium. Candida ID allowed the discrimination between C. glabrata (creamy and smooth) and C. krusei (rough and white) colonies. Other species showed different colony textures and colours, white being the predominant colour. Candida ID was very useful for the presumptive identification C. albicans isolates.
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de Fernández MI, Negroni R, Arechavala A. [Tibial abscess caused by histoplasma capsulatum]. Medicina (B Aires) 2001; 61:191-2. [PMID: 11374144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023] Open
Abstract
Disseminated histoplasmosis is the most serious form of the disease produced by the fungus Histoplasma capsulatum. Histoplasmosis was first described by Darling in 1906, and it is endemic in certain areas of Central and Southeastern regions of USA, and most Latin America countries, including the Pampa húmeda and Mesopotamia regions in Argentina, but in other continents it has a limited regional distribution. Lung involvement predominates in 90% of cases, but H. capsulatum may involve bone and soft tissues. Bone lesions without other signs of infection are very rare, and are often misdiagnosed as cancer. We report a case of disseminated histoplasmosis in a man with a myelodysplasia who presented a left tibial abscess, without any clinical evidence of pulmonary involvement. The patient was successfully treated with itraconazole.
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