Summary
The therapeutic effects of cefpirome (HR 810), a new cephalosporin, on mixed infections induced in mice withEnterococcus faecalis HL 1147 andEscherichia coli HL34 were compared with those of ampicillin (AMP), cefuzonam (CZON), and ceftazidime (CAZ). Cefpirome was more effective in protecting mice with systemic mixed infection (median effective dose, 52 mg/kg) than the other antibiotics (all more than 320 mg/kg). With increasing doses of cefpirome, the percentages of the animals havingE. faecalis andE. coli bacteremia were decreased. CZON and CAZ reduced onlyE. coli, and AMP failed to reduce both strains. In the mice with urinary tract mixed infection, cefpirome and CZON (40 mg/kg × 5, s. c.) significantly decreased the cfu/g kidney (p<0.01 vs. nontreated control), while AMP and CAZ were active only againstE. faecalis (p<0.05) andE. coli (p<0.01), respectively.
Zusammenfassung
Die therapeutische Wirksamkeit von Cefpirom (HR 810), einem neuen Cephalosporin, auf Mischinfektionen durchEnterococcus faecalis HL 1147 undEscherichia coli HL34 bei Mäusen wurde mit derjenigen von Ampicillin (AMP), Cefuzonam (CZON) und Ceftazidim (CAZ) verglichen. In seiner protektiven Wirkung gegen systemische Mischinfektionen bei Mäusen war Cefpirom mit einer mittleren effektiven Dosis von 52 mg/kg den anderen Antibiotika überlegen (alle Werte über 320 mg/kg). Der Prozentsatz der Tiere, bei denen eine Bakteriämie durchE. faecalis undE. coli auftrat, nahm mit zunehmend höheren Cefpirom-Dosen entsprechend ab. Durch CZON wurde nur eine Verminderung derE. coli-Infektionen erreicht und AMP hatte auf beide Stämme keine keimreduzierende Wirkung. Bei Mischinfektionen der Harnwege bei Mäusen führten Cefpirom und CZON (40 mg/kg × 5, s. c.) zu einer signifikanten Verminderung der Keimbildnerzahl (KBE/g Niere; p<0,01) im Vergleich zu unbehandelten Kontrollen. Für AMP ließ sich dagegen nur gegenE. faecalis (p<0,05) und für CAZ gegenE. coli (p<0,01) eine Wirksamkeit nachweisen.
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Arai, S., Hayashi, S. Therapeutic effects of cefpirome (HR 810) on experimental mixed infections with enterococcus faecalis and escherichia coli in mice. Infection 18, 186–190 (1990). https://doi.org/10.1007/BF01642112
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DOI: https://doi.org/10.1007/BF01642112