Ger P. A. Bongaerts

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Seven Bacillus strains including one of the original Bacillus fastidiosus strains of Den Dooren de Jong could grow on urate, allantoin, and, except one, on allantoate. No growth could be detected on adenine, guanine, hypoxanthine, xanthine, and on degradation products of allantoate. Some strains grew very slowly in complex media. The metabolic pathway from(More)
Uricase (urate:oxygen oxidoreductase, EC 1.7.3.3) of Bacillus fastidiosus was purified to homogeneity in a two-step procedure and was crystallized. The native molecule had a molecular weight of 145 000--150 000 and was composed of subunits of two kinds (Mr = 36 000 and 39 000) in a 1 : 1 ratio. The quaternary structure of the enzyme was reversibly altered,(More)
Previously, we have demonstrated that short bowel syndrome (SBS) patients suffer daily from D-lactic acidemia; in these patients rather high amounts of (bacterial) D-lactate emerge in blood and urine with a circadian rhythm. The aim of this study was to establish the microbial basis of D-lactic acidemia in SBS. Therefore, faecal flora of (young and adult)(More)
Enormous amounts of lactic acid are produced during endurance sport by muscle cells. This metabolite is thought responsible for the muscle pain and the fatigue during sport. Its internal removal from the body by enzymatic conversion depends mainly on the capacity of the hepatic gluconeogenesis that converts lactic acid to glucose. The extraordinary sportive(More)
Three chemotherapy-induced neutropenic hematologic patients with severe systemic infection caused by Fusobacterium nucleatum, a Gram-negative anaerobic rod, are described. Anaerobic infections are not very common in this patient category, but in a short period of time, several such patients were seen. The infection was considered to be caused by a(More)
From a needle biopsy of the body of the 12th thoracic vertebra in a 74-year-old man with spinal osteomyelitis a Veillonella parvula was isolated. The significance of this bacterium as lactic acid indicator has been considered and discussed. Since this strictly anaerobic bacterium mainly uses lactic acid for energy generation, lactic acid must continuously(More)
D-Lactate produced by abundant intestinal lactobacilli during acidotic episodes in short bowel (SB) patients is commonly regarded as a main factor in the pathogenesis of SB syndrome-associated (D-lactic) acidosis. Since we had observed that gram-positive bacteria, mainly lactobacilli, were abundant even in the absence of acidosis, we studied serum(More)
A review-based hypothesis is presented on the energy flow in cancer patients. This hypothesis centres on the hypoxic condition of tumours, the essential metabolic consequences, especially the gluconeogenesis, the adaptation of the body, and the pathogenesis of cancer cachexia. In growing tumours the O(2) concentration is critically low. Mammalian cells need(More)
The susceptibility of ceftazidime, five other cephalosporins, moxalactam and cefoxitin to 13 different beta-lactamases was determined by means of the spectrophotometric method. None of the bacterial sonicates used as crude beta-lactamase solutions and which were prepared with cephalothin as an inducer, hydrolysed ceftazidime, cefoxitin or moxalactam. In(More)
Comparison of the activity of cefoperazone, cefamandole, cefotaxime, cephalothin and moxalactam against Enterobacteriaceae showed cefoperazone to be twofold (Escherichia coli, Klebsiella) to eigthfold (Enterobacter) more active than cefamandole. The lowes MIC values were found for cefotaxime (0.03 - 0.25 microgram/ml) followed by moxalactam (0.06 - 0.25(More)