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Medicina & Laboratorio

2021, Number 4

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Medicina & Laboratorio 2021; 25 (4)

Microbiological diagnosis in bronchoalveolar lavage. Literature review

Alzate-Rincón CM, Loaiza-Díaz N, Aguilar Y

Language: Spanish
References: 88
Page: 675-693
PDF size: 225.02 Kb.


ABSTRACT

Bronchoalveolar lavage (BAL) was described approximately 50 years ago and since then it has been used with increasing frequency, becoming one of the methods of choice for making the microbiological diagnosis of lower respiratory infections, as it facilitates the identification of opportunistic and non-opportunistic pathogens. Its use increased in parallel with the number of immunocompromised patients, especially due to AIDS and transplantation, situations in which patients frequently suffer from lung infections due to opportunistic germs. BAL is a safe procedure that allows obtaining samples that provide comprehensive information on the cellular and microbiological characteristics of the lower respiratory tract. Optimal collection, transport, storage and processing of samples is essential to guarantee its usefulness. Analysis of the samples is done both by conventional techniques for the identification of microorganisms, such as staining and isolation in culture media, as well as by other methods such as immunofluorescence, immunological tests for the detection of antigens and antibodies, and molecular biology assays. In this review, an update in presented on the procedure for obtaining, storing and transporting BAL samples, as well as on the most widely used microbiological diagnostic techniques to identify the main infectious agents associated with lower respiratory tract diseases.


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