Klara,

if you have a polyclonal, you could try to absorb it against the undesired species.

Or generate your own, esp. if you can identify an abundant surface protein that is specific for L. monocytogenes. If there is no such protein, compare abundant surface proteins against the other species and choose a unique that is region for raising a peptide antibody against it. Both strategies require some effort, but might be worth considering, esp. if you should need large amounts of antibody.

On the other hand, a molecular assay by (q)PCR might be the quickest and most affordable solution as long as you don't need to generate any images or FACS data.

Hi

See some papers and other sources:

Article Development of an ELISA specific for Listeria monocytogenes ...

https://meridian.allenpress.com/jfp/article-pdf/54/10/752/1661961/0362-028x-54_10_752.pdf

https://www.biocompare.com/pfu/110627/soids/382/ELISA_Kit/Listeria_monocytogenes

https://www.eurofins-technologies.com/bacspec-listeria-elisa-kit-1x96-well-plate.html

https://www.solusscientific.com/listeria-monocytogenes/

Best regards

Tomasz

kindly check the attached file