[The relationship of Campylobacter jejuni subsp. jejuni enterotoxigenicity and the increase of cAMP and electrolyte changes in the rat intestine].
BACKGROUND
Small intestine alterations produced by the enterotoxigenic capacity of Campylobacter jejuni subsp. jejuni are similar to the hydric, electrolytic and pathological changes caused by choleraic and thermolabile Escherichia coli toxins.


OBJECTIVE
To study the enterotoxigenic capacity of 4 strains of Campylobacter jejuni subsp. jejuni using the intestinal loop model.


METHODS
Rat intestinal loops were inoculated with culture filtrates of the four strains. Enterotoxigenicity was assessed by fluid accumulation, the increase in Na+ and Cl- in the loop fluid, and cAMP increase in loop tissues. An enterotoxigenic Escherichia coil strain and sterile Brucella both were used as positive and negative controls, respectively.


RESULTS
The filtrates of two strains produced fluid accumulation in the loops, significantly increased Na+ and Cl- secretion to the intestinal lumen and increased tissue cAMP levels.


CONCLUSIONS
Some strains of Campylobacter jejuni subsp. jejuni are able to show enterotoxigenicity in vivo, increasing cAMP levels in the intestinal cells and altering electrolyte exchange mechanisms.
Fernández
H
H
Instituto de Microbiología Clínica, Universidad Austral de Chile, Valdivia, Chile. hfernand@uach.cl
Toro
J
J
D000818:Animals; D016123:Campylobacter jejuni / Q000302:isolation & purification* / Q000378:metabolism / Q000472:pathogenicity; D003470:Culture Media; D000242:Cyclic AMP / Q000032:analysis*; D004573:Electrolytes / Q000032:analysis*; D004768:Enterotoxins / Q000096:biosynthesis / Q000633:toxicity*; D005260:Female; D007419:Intestinal Secretions / Q000737:chemistry; D007422:Intestines / Q000382:microbiology*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D014882:Water-Electrolyte Balance
D003470:Culture Media; D004573:Electrolytes; D004768:Enterotoxins; D000242:Cyclic AMP
Enterotoxigenicidad de Campylobacter jejuni subsp. jejuni y su relación con aumento de AMPc y alteración electrolítica en el intestino de ratas.