Thirty-two samples of ceriche, a South American acidified fish product, were tested for the presence of listeria. Listeria innocua was isolated from 24 samples (75%) and L. monocytogenes was isolated from three samples (9%) of those tested.
Fuchs, R.S.; Sirvas, S. Incidence of Listeria monocytogenes in an acidified fish product, ceviche. Letters in Applied Microbiology (1991) 12 (3) 88-90. [DOI: 10.1111/j.1472-765X.1991.tb00512.x]