English to Spanish Science Genetics nucleic acid amplification

Buenas!

Se trata de una patente en la que se propone un método para amplificar el ácido nucleico:

"Once the nucleic acid is amplified, a nucleic acid assay requires a secondary detection technology such as spectrophotometry, turbidity, LFD (lateral flow dipsticks) or luciferase. However, such known techniques have drawbacks. Fluorescent reagents require labelling to allow UV fluorescence, making it expensive. Furthermore, reagents such as SYBR green binds to DNA making it inherently carcinogenic; the Ames Test shows it to be both mutagenic and cytotoxic. Also SYBR green is not specific and attaches to any double stranded DNA thus increasing background signal. Turbidity measurements require expensive instrumentation to provide quantification. Lastly, the reagents used in LFD require secondary conjugation which is susceptible to non-specific detection."

Y aquí el "background" me desconcierta porque no sé si se refiere a "anterior", "de fondo"... Estoy perdida!

Thanks!!