What does the published scientific research say about Lactobacillus acidophilus?

Eight peer-reviewed PubMed articles index Lactobacillus acidophilus — also historically referenced as Bacillus acidophilus — in a plant-input research context. The published record covers pre-harvest biocontrol, bacteriocin production, and genomic characterization across named strains including CRL641 and PNW3. Researchers searching 'Lactobacillus acidophilus scientific literature' or 'L. acidophilus agricultural biocontrol research' will find studies documenting antimicrobial activity across several application contexts.

The most directly plant-input-relevant evidence comes from PMID 36516726, where a lactic acid bacteria cocktail that included L. acidophilus was spray-applied to lettuce and spinach. Peer-reviewed research reported approximately 2-log reductions of Listeria monocytogenes and ~1-log reductions of E. coli O157:H7 on 'Green Star' lettuce under growth chamber conditions, with immediate bactericidal activity against E. coli O157 surrogates on field-grown lettuce.

The broader L. acidophilus literature documents production of the bacteriocin lactacin B (PMID 8408870) and bioprotective cell-free extracts with demonstrated antimicrobial activity against spoilage organisms. Genomic analysis of strain PNW3 (PMID 33321968) identified genes associated with bacteriocin biosynthesis — including a predicted helveticin J candidate — and classified the strain as a predicted non-human pathogen, though the authors note that further safety investigations are necessary before probiotic application in livestock or food contexts.