Sb. Moura et al., THE INFLAMMATORY RESPONSE OF THE GASTRIC-MUCOSA OF MICE EXPERIMENTALLY INFECTED WITH GASTROSPIRILLUM-SUIS, Journal of Medical Microbiology, 39(1), 1993, pp. 64-68
To establish an experimental model to study gastric spiral non-cultiva
ble bacteria, 30 4-week-old female CFW (LOB) mice were inoculated with
porcine gastric mucus containing ''Gastrospirillum suis'' and 25 mice
were inoculated with mucus without ''G. suis''. Mice were examined 3,
7, 14, 21, 28 and 60 days after inoculation. Fragments from the membr
anous, oxyntic and antral gastric mucosa and from the duodenal mucosa
were obtained for histological and microbiological analysis. Tightly s
piralled bacteria were seen in smears and in histological sections of
the antral and oxyntic mucosa from all G. suis-infected mice. The pre-
formed urease test also gave positive results in both tissues. In cont
rol mice, no tightly spiralled bacteria were seen. By 7 days after ino
culation, the test animals had developed an inflammatory infiltrate of
mononuclear cells, some neutrophils and a few eosinophils, mainly in
the lower third of the antral and oxyntic mucosa, which persisted for
the remainder of the observation period. This model can assist in the
understanding of several clinical, pathological and immunological aspe
cts of infection with spiral gastric bacteria, particularly those asso
ciated with non-cultivable spiral bacteria.