Morganella morganii has been reported as a short bacilli
Gram-negative, catalase-positive, and oxidase-negative
(KIM et al., 2001) bacterium frequently found in tuna and
tuna products, including yellowfin tuna, associated with the
presence of histamine. Morganella morganii is considered one
of the most efficient histamine-forming bacteria and has been
associated with several histamine outbreaks resulting from tuna
consumption (BJORNSDOTTIR-BUTLER et al., 2010, 2011;
FERNÁNDEZ-NO et al., 2010).