scholarly journals EFICÁCIA DE SOLUÇÕES DESINFETANTES NA ELIMINAÇÃO DE FUNGOS DE IMPORTÂNCIA MÉDICA E VETERINÁRIA

2013 ◽  
Vol 18 (1) ◽  
Author(s):  
Isabel Martins Madrid ◽  
Alessandra Jacomelli Teles ◽  
Rosema Santin ◽  
Antonella Souza Mattei ◽  
Angelita Gomes ◽  
...  
Keyword(s):  
Cryptococcus Neoformans ◽  
Clinical Laboratory ◽  
Sporothrix Schenckii ◽  
Candida Spp ◽  
Malassezia Pachydermatis ◽  
Clinical Laboratory Standard Institute ◽  
Clinical Laboratory Standard

Programas de higiene e desinfecção são essenciais no controle ambiental de agentes fúngicos potencialmente patogênicos aos homens e animais, dessa forma objetivou-se avaliar a ação antifúngica do hipoclorito de sódio 4% e digluconato de clorexidina 6,6% em doze isolados fúngicos. Foram testados fungos isolados do ambiente e de casos clínicos como Aspergillus spp, Candida spp, Microsporum spp, Malassezia pachydermatis, Cryptococcus neoformans e Sporothrix schenckii. Foram utilizadas as técnicas de microdiluição em caldo e difusão em ágar conforme protocolos descritos pelo Clinical Laboratory Standard Institute (CLSI) com adaptações para agentes químicos. Todos os isolados foram sensíveis a concentrações inferiores a recomendada pelo fabricante do digluconato de clorexidina (6,6%) com CIM e CFM entre ≤0,42 a 1,68%. Para o hipoclorito de sódio, 58,3% dos isolados foram resistentes a concentração recomendada pelo fabricante (4%) apresentando CIM e CFM entre 2 e >8%. O digluconato de clorexidina apresentou maiores zonas de inibição do que o hipoclorito de sódio, com halos de até 31mm de diâmetro. A clorexidina demonstrou ação fungicida em baixas concentrações sendo eficaz na eliminação de fungos filamentosos e leveduriformes de importância médica e veterinária, enquanto o hipoclorito de sódio somente obteve esta ação em altas concentrações.

scholarly journals Chemical composition, toxicity and larvicidal and antifungal activities of Persea americana (avocado) seed extracts

2009 ◽  
Vol 42 (2) ◽  
pp. 110-113 ◽  
Author(s):  
João Jaime Giffoni Leite ◽  
Érika Helena Salles Brito ◽  
Rossana Aguiar Cordeiro ◽  
Raimunda Sâmia Nogueira Brilhante ◽  
José Júlio Costa Sidrim ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Cryptococcus Neoformans ◽  
Inhibitory Concentration ◽  
Methanol Extract ◽  
Artemia Salina ◽  
Hexane Extract ◽  
Candida Spp ◽  
Malassezia Pachydermatis ◽  
Methanol Extracts

The present study had the aim of testing the hexane and methanol extracts of avocado seeds, in order to determine their toxicity towards Artemia salina, evaluate their larvicidal activity towards Aedes aegypti and investigate their in vitro antifungal potential against strains of Candida spp, Cryptococcus neoformans and Malassezia pachydermatis through the microdilution technique. In toxicity tests on Artemia salina, the hexane and methanol extracts from avocado seeds showed LC50 values of 2.37 and 24.13mg mL-1 respectively. Against Aedes aegypti larvae, the LC50 results obtained were 16.7mg mL-1 for hexane extract and 8.87mg mL-1 for methanol extract from avocado seeds. The extracts tested were also active against all the yeast strains tested in vitro, with differing results such that the minimum inhibitory concentration of the hexane extract ranged from 0.625 to 1.25mg L-¹, from 0.312 to 0.625mg mL-1 and from 0.031 to 0.625mg mL-1, for the strains of Candida spp, Cryptococcus neoformans and Malassezia pachydermatis, respectively. The minimal inhibitory concentration for the methanol extract ranged from 0.125 to 0.625mg mL-1, from 0.08 to 0.156mg mL-1 and from 0.312 to 0.625mg mL-1, for the strains of Candida spp., Cryptococcus neoformans and Malassezia pachydermatis, respectively.

scholarly journals Tendência de resistência entre isolados clínicos de Staphylococcus aureus em um hospital universitário do norte do Paraná de 2002 a 2011

2015 ◽  
Vol 36 (1Supl) ◽  
pp. 275
Author(s):  
Marcia Regina Eches Perugini ◽  
Vitor Hugo Perugini ◽  
Ana Rúbia Magalhães Ferreira ◽  
Caio Ferreira de Oliveira ◽  
Guilherme Teixeira Gomes ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Clinical Laboratory ◽  
Clinical Laboratory Standard Institute ◽  
Clinical Laboratory Standard

Staphylococcus aureus são patógenos com alta ocorrência em infecções hospitalares e comunitárias e têm grande capacidade de adquirir resistência. O objetivo deste estudo foi determinar o perfil de resistência aos antimicrobianos de S. aureus isolados no Hospital Universitário de Londrina de janeiro de 2002 a dezembro de 2011. A análise retrospectiva de 3.494 S. aureus foi realizada a partir de um banco de dados do setor de Microbiologia do Laboratório Clínico do Hospital Universitário de Londrina (HUL). Resistência aos antimicrobianos foi determinada de acordo com os critérios recomendados pelo Clinical Laboratory Standard Institute (CLSI-2011). Os maiores percentuais de resistência foram verificados para eritromicina (49,4%), oxacilina, clindamicina (41,8%) e ciprofloxacina (36,5%). Adicionalmente, ocorreu redução significativa nas taxas de resistência à gentamicina, e a sulfametoxazol-trimetoprim. Todas as cepas analisadas foram sensíveis à linezolide. Verificou-se que 40% apresentaram susceptibilidade reduzida à vancomicina. Estes dados revelaram uma provável mudança na epidemiologia de S. aureus na nossa região, o que pode trazer impacto no tratamento e controle da infecção por este agente etiológico.

scholarly journals Identifikasi Pseudomonas aeruginosa dan Uji Sensitivitas terhadap Antibiotik dari Sampel Pus Infeksi Luka Operasi di RSUD Dr. Moewardi

Biomedika ◽  
2018 ◽  
Vol 10 (2) ◽  
pp. 18-24
Author(s):  
Aulia Wahyu Sulviana ◽  
Nony Puspawati ◽  
Rizal Maarif Rukmana
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Clinical Laboratory ◽  
Cross Sectional ◽  
Clinical Laboratory Standard Institute ◽  
Clinical Laboratory Standard ◽  
Selective Agar

Infeksi luka operasi merupakan bagian dari infeksi nosokomial. Salah satu bakteri penyebab tertinggi infeksi luka operasi adalah Pseudomonas aeruginosa. Penelitian ini bertujuan untuk mengetahui adanya Pseudomonas aeruginosa pada sampel pus infeksi luka operasi dari Rumah Sakit Umum Daerah Dr. Moewardi dan untuk mengetahui pola sensitivitasnya terhadap beberapa antibiotik. Jenis penelitian ini adalah penelitian analitik observasional dengan pendekatan cross sectional. Bakteri Pseudomonas aeruginosa yang telah diisolasi dari sampel pada media Pseudomonas Selective Agar lalu dilakukan pengecatan Gram dan uji biokimia, kemudian dilakukan uji sensitivitas terhadap beberapa antibiotik yaitu: siprofloksasin, seftriakson, meropenem, sefotaksim, gentamisin, dan tobramisin dengan metode difusi Kirby Bauer. Hasil diameter zona hambat pada uji sensitivitas dibandingkan dengan standar diameter zona hambat menurut Clinical Laboratory Standard Institute. Hasil penelitian menunjukkan bahwa dari 45 sampel pus infeksi luka operasi di Rumah Sakit Umum Daerah Dr. Moewardi teridentifikasi 11 sampel positif Pseudomonas aeruginosa. Hasil uji sensitivitas menunjukkan bahwa Pseudomonas aeruginosa sensitif 100% terhadap meropenem. Hasil uji sensitivitas menunjukkan sensitif 90,90% terhadap siprofloksasin, tobramisin dan gentamisin. Hasil uji sensitivitas menunjukkan sensitif 63,63% pada seftriakson dan hasil uji sensitivitas menunjukkan sensitif 9,09% pada sefotaksim.

Etest ECVs/ECOFFs for detection of resistance in prevalent and three non-prevalent Candida spp. to triazoles and amphotericin B and Aspergillus spp. to caspofungin: Further assessment of modal variability

2021 ◽  
Author(s):  
A. Espinel-Ingroff ◽  
M. Sasso ◽  
J. Turnidge ◽  
M. Arendrup ◽  
F. Botterel ◽  
...  
Keyword(s):  
Amphotericin B ◽  
Susceptibility Testing ◽  
Clinical Laboratory ◽  
Antifungal Susceptibility ◽  
Point Mutations ◽  
Fungal Species ◽  
Candida Spp ◽  
Pichia Kudriavzevii ◽  
Routine Testing ◽  
Data Points

Susceptibility testing is an important tool in the clinical setting; its utility is based on the availability of categorical endpoints, breakpoints (BPs) or epidemiological cutoff values (ECVs/ECOFFs). CLSI and EUCAST have developed antifungal susceptibility testing, BPs and ECVs for some fungal species. Although the Concentration Gradient Strip BioMerieux Etest is useful for routine testing in the clinical laboratory, ECVs are not available for all agent/species; the lack of clinical data precludes development of BPs. We re-evaluated and consolidated Etest data points from three previous studies, and included new data. We defined ECOFFinder Etest ECVs for three sets of species/agent combinations: fluconazole, posaconazole and voriconazole and 8 Candida spp.; amphotericin B and 3 non-prevalent Candida spp.; and caspofungin and 5 Aspergillus spp. The total of Etest MICs from 23 laboratories (Europe, the Americas, South Africa) included (antifungal agent/dependent): 17,242 Candida albicans , 244 C. dubliniensis , 5,129 C. glabrata species complex (SC), 275 C. guilliermondii ( Meyerozyma guilliermondii ), 1,133 C. krusei ( Pichia kudriavzevii ), 933 C. kefyr ( Kluyveromyces marxianus ), 519 C. lusitaniae ( Clavispora lusitaniae ), 2,947 C. parapsilosis SC, 2,214 C. tropicalis , 3,212 Aspergillus fumigatus , 232 A. flavus , 181 A. niger , and 267 A. terreus SC isolates. Triazole MICs for 66 confirmed non-wild-type (non-WT) Candida isolates were available ( ERG11 point mutations). Distributions fulfilling CLSI ECV criteria were pooled and ECOFFinder Etest ECVs were established for triazoles (9 Candida spp.); amphotericin B (3 less-prevalent Candida spp.) and caspofungin (4 Aspergillus spp.). Etest fluconazole ECVs could be good detectors of Candida non-WT isolates (59/61 Non-WT: 4 of 6 species).

scholarly journals Cryptococcus neoformans isolation from swallow (Hirundo rustica) excreta in Iran

2011 ◽  
Vol 53 (3) ◽  
pp. 125-127 ◽  
Author(s):  
Mohammad T. Hedayati ◽  
Sabah Mayahi ◽  
Mahdi Fakhar ◽  
Tahereh Shokohi ◽  
Mohammad Majidi
Keyword(s):  
Cryptococcus Neoformans ◽  
Hirundo Rustica ◽  
Immunocompromised Patients ◽  
Candida Spp ◽  
Colony Forming Units ◽  
Northern Cities ◽  
Life Threatening

Cryptococcus neoformans is an encapsulated yeast that can cause cryptococcosis, a life-threatening infection that mainly occurs in immunocompromised patients. The major environmental sources of C. neoformans have been shown to be soil contaminated with avian droppings. In the present study, we evaluated the isolation of C. neoformans from swallow (Hirundo rustica) excreta in two northern cities of Iran. Ninety-seven swallow droppings were evaluated and 498 yeast-like colonies were isolated and identified as Rhodotorula spp. (62.8%), Candida spp. (28.5%)and C. neoformans (8.7%). Cryptococcus neoformans was isolated from 5/97 (5.2%) of collected samples. Min-Max colony forming units (CFU) per one gram for the positive samples were 3-10 C. neoformans colonies. The total mean CFU per one gram for the positive samples was 4.8. The results of this study demonstrate that excreta of swallow may harbor different species of potentially pathogenic yeasts, mainly C. neoformans, and may be capable of disseminating these fungi in the environment.

scholarly journals Interactions between Triazoles and Amphotericin B against Cryptococcus neoformans

2000 ◽  
Vol 44 (9) ◽  
pp. 2435-2441 ◽  
Author(s):  
Francesco Barchiesi ◽  
Anna M. Schimizzi ◽  
Francesca Caselli ◽  
Andrea Novelli ◽  
Stefania Fallani ◽  
...  
Keyword(s):  
Combination Therapy ◽  
Cryptococcus Neoformans ◽  
Amphotericin B ◽  
Clinical Laboratory ◽  
Fungal Infections ◽  
National Committee ◽  
Positive Interaction ◽  
Pronounced Increase

ABSTRACT The interaction of amphotericin B (AmB) and azole antifungal agents in the treatment of fungal infections is still a controversial issue. A checkerboard titration broth microdilution-based method that adhered to the recommendations of the National Committee for Clinical Laboratory Standards was applied to study the in vitro interactions of AmB with fluconazole (FLC), itraconazole (ITC), and the new investigational triazole SCH 56592 (SCH) against 15 clinical isolates ofCryptococcus neoformans. Synergy, defined as a fractional inhibitory concentration (FIC) index of ≤0.50, was observed for 7% of the isolates in studies of the interactions of both FLC-AmB and ITC-AmB and for 33% of the isolates in studies of the SCH-AmB interactions; additivism (FICs, >0.50 to 1.0) was observed for 67, 73, and 53% of the isolates in studies of the FLC-AmB, ITC-AmB, and SCH-AmB interactions, respectively; indifference (FICs, >1.0 to ≤2.0) was observed for 26, 20, and 14% of the isolates in studies of the FLC-AmB, ITC-AmB, and SCH-AmB interactions, respectively. Antagonism (FIC >2.0) was not observed. When synergy was not achieved, there was still a decrease, although not as dramatic, in the MIC of one or both drugs when they were used in combination. To investigate the effects of FLC-AmB combination therapy in vivo, we established an experimental model of systemic cryptococcosis in BALB/c mice by intravenous injection of cells of C. neoformans 2337, a clinical isolate belonging to serotype D against which the combination of FLC and AmB yielded an additive interaction in vitro. Both survival and tissue burden studies showed that combination therapy was more effective than FLC alone and that combination therapy was at least as effective as AmB given as a single drug. On the other hand, when cells of C. neoformans 2337 were grown in FLC-containing medium, a pronounced increase in resistance to subsequent exposures to AmB was observed. In particular, killing experiments conducted with nonreplicating cells showed that preexposure to FLC abolished the fungicidal activity of the polyene. However, this apparent antagonism was not observed in vivo. Rather, when the two drugs were used sequentially for the treatment of systemic murine cryptococcosis, a reciprocal potentiation was often observed. Our study shows that (i) the combination of triazoles and AmB is significantly more active than either drug alone against C. neoformans in vitro and (ii) the concomitant or sequential use of FLC and AmB for the treatment of systemic murine cryptococcosis results in a positive interaction.

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