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Infection by Aspergillus niger — Clinical Guidelines

Overview

Aspergillus niger is a filamentous fungus capable of causing infections in immunocompromised individuals and can contaminate various food products, leading to aflatoxin production, though direct clinical infection by A. niger itself is less common compared to other Aspergillus species like A. fumigatus. 1 2 5

Diagnosis

Laboratory Testing: Utilize immunoaffinity column cleanup methods coupled with liquid chromatography and fluorescence detection for accurate quantification of aflatoxins in contaminated samples (relevant for environmental and food safety, not direct clinical diagnosis). 1 2 4 5 6

Immunoassays: ELISA can detect aflatoxin B1 at very low levels, aiding in environmental monitoring but not direct clinical diagnosis of A. niger infection. 9

Clinical Symptoms: Diagnosis of invasive aspergillosis typically relies on clinical symptoms, imaging, and microbiological cultures rather than aflatoxin detection methods. 1 2 5

Management

Antifungal Therapy: Voriconazole is often first-line for invasive aspergillosis, though specific dosing details are not provided in the abstracts. 5

Supportive Care: Includes management of underlying conditions and supportive treatments tailored to patient status. 5

Environmental Control: Reducing exposure to contaminated materials is crucial, particularly in immunocompromised patients. 1 2

Special Populations

Immunocompromised Individuals: Higher risk for invasive infections; close monitoring and aggressive antifungal therapy are essential. 5

No Specific Guidance: Abstracts do not provide detailed recommendations specific to pregnancy, pediatrics, or elderly populations regarding A. niger infections. 5

Key Recommendations

Employ immunoaffinity column cleanup methods with liquid chromatography and fluorescence detection for accurate aflatoxin analysis in environmental and food safety contexts to prevent exposure (Evidence: Moderate) 1 2 4 5 6

Voriconazole should be considered as first-line therapy for invasive aspergillosis, though specific dosing should follow clinical guidelines (Evidence: Expert opinion) 5

Implement stringent environmental controls to minimize exposure to Aspergillus-contaminated materials, particularly in immunocompromised settings (Evidence: Expert opinion) 1 2

References

1 Liu G, Zhu Z, Cheng J, Senyuva HZ. Immunoaffinity column cleanup with liquid chromatography using postcolumn bromination for the determination of aflatoxins in black and white sesame seed: single-laboratory validation. Journal of AOAC International 2012. link 2 Bao L, Liang C, Trucksess MW, Xu Y, Lv N, Wu Z et al.. Determination of aflatoxins B1, B2, G1, and G2 in olive oil, peanut oil, and sesame oil using immunoaffinity column cleanup, postcolumn derivatization, and liquid chromatography/fluorescence detection: collaborative study. Journal of AOAC International 2012. link 3 Rameil S, Schubert P, Grundmann P, Dietrich R, Märtlbauer E. Use of 3-(4-hydroxyphenyl)propionic acid as electron donating compound in a potentiometric aflatoxin M1-immunosensor. Analytica chimica acta 2010. link 4 Calleri E, Marrubini G, Brusotti G, Massolini G, Caccialanza G. Development and integration of an immunoaffinity monolithic disk for the on-line solid-phase extraction and HPLC determination with fluorescence detection of aflatoxin B1 in aqueous solutions. Journal of pharmaceutical and biomedical analysis 2007. link 5 Senyuva HZ, Gilbert J. Immunoaffinity column cleanup with liquid chromatography using post-column bromination for determination of aflatoxins in hazelnut paste: interlaboratory study. Journal of AOAC International 2005. link 6 Stroka J, von Holst C, Anklam E, Reutter M. Immunoaffinity column cleanup with liquid chromatography using post-column bromination for determination of aflatoxin B1 in cattle feed: collaborative study. Journal of AOAC International 2003. link 7 Sharman M, Gilbert J. Automated aflatoxin analysis of foods and animal feeds using immunoaffinity column clean-up and high-performance liquid chromatographic determination. Journal of chromatography 1991. link95771-1) 8 Trucksess MW, Young K, Donahue KF, Morris DK, Lewis E. Comparison of two immunochemical methods with thin-layer chromatographic methods for determination of aflatoxins. Journal - Association of Official Analytical Chemists 1990. link 9 Lawellin DW, Grant DW, Joyce BK. Enzyme-linked immunosorbent analysis for aflatoxin B1. Applied and environmental microbiology 1977. link

Infection by Aspergillus niger