Hepatic and systemic metabolic responses to aerobic and anaerobic intra-abdominal abscesses in a highly reproducible chronic rat model.
A single, uniform abscess was formed in 100% of the animals inoculated with a fecal pellet made of sterile rat feces, agar, and a known number and strain of bacteria. The effects of monoclonal Escherichia coli abscess (83 rats) were compared to those of sterile abscess (34 rats) and sham operation (35 rats without abscess). Bacteroides fragilis was added to the sterile pellet to study the effect of an anaerobic monoclonal abscess (16 rats) or of a biclonal abscess containing both aerobes and anaerobes (32 rats). After inoculation, a peritonitis stage with leucopenia, hypoglycemia, body weight loss, and slight fever was followed by the abscess stage with leucocytosis and a slight hyperglycemia. Mild hepatic energy charge deficiency and hepatic lactic acidosis were observed in sterile abscess rats, and slightly enhanced energy charge was seen in monoclonal E. coli abscess rats. The addition of B. fragilis to the sterile pellet, alone or together with E. coli, produced hepatic energy charge deficiency and hepatic lactic acidosis, which were significantly enhanced compared with the monoclonal E. coli abscess rats. The greatest effect was seen in the biclonal E. coli plus B. fragilis abscess, suggesting that anaerobic or combined aerobe and anaerobe abscesses may produce a greater hepatic injury than an aerobic organism abscess alone. This may account for the apparent synergic interaction between aerobic and anaerobic organisms.
D000005:Abdomen; D000038:Abscess / Q000150:complications / Q000378:metabolism*; D000138:Acidosis / Q000209:etiology / Q000378:metabolism; D000227:Adenine Nucleotides / Q000378:metabolism; D000818:Animals; D001442:Bacteroides Infections / Q000150:complications / Q000378:metabolism*; D001441:Bacteroides fragilis; D001786:Blood Glucose / Q000378:metabolism; D001835:Body Weight; D004734:Energy Metabolism; D004927:Escherichia coli Infections / Q000150:complications / Q000378:metabolism*; D005334:Fever / Q000209:etiology; D007773:Lactates / Q000378:metabolism; D019344:Lactic Acid; D007958:Leukocyte Count; D008099:Liver / Q000378:metabolism* / Q000473:pathology; D008297:Male; D011773:Pyruvates / Q000378:metabolism; D019289:Pyruvic Acid; D051381:Rats; D011919:Rats, Inbred Strains
D000227:Adenine Nucleotides; D001786:Blood Glucose; D007773:Lactates; D011773:Pyruvates; D019344:Lactic Acid; D019289:Pyruvic Acid