PMID- 2964156 OWN - NLM STAT- MEDLINE DCOM- 19880325 LR - 20191029 IS - 0176-6724 (Print) IS - 0176-6724 (Linking) VI - 266 IP - 3-4 DP - 1987 Oct TI - Siderophore production by enterotoxigenic Salmonella. PG - 338-46 AB - Eleven Salmonella strains of diverse origin studied previously for enterotoxigenicity, cell surface hydrophobicity (HIC) and haemagglutination (HA) were studied for the production of a siderophore precursor 2,3-dihydroxybenzoic acid (DHB) by colorimetry. The Salmonella strains were similarly grown aerobically and anaerobically in a deferrated (DF) medium containing 0.05 micrograms/ml iron at 22 degrees C and 37 degrees C. Salmonella strains positive for both heat-labile (LT) and heat-stable (ST) enterotoxins, i.e. ST+ LT+ strains produced 25-70 mg/l, DHB, bound to hydrophobic phenyl sepharose gel and exhibited mannose-resistant haemagglutination (MRHA) of bovine, chicken and human group A erythrocytes. Conversely, heat-labile enterotoxin-positive, only i.e. ST- LT+ strains produced less than 25 mg/l DHB and were negative for the three aforementioned parameters. This dichotomy was shown by strains grown aerobically at 22 degrees C. Strains grown at 37 degrees C gave disparate results while Salmonella anaerobically grown at both growth temperatures did not produce DHB. These studies demonstrate production of a siderophore during iron stress. FAU - Jiwa, S F AU - Jiwa SF AD - Department of Microbiology and Parasitology, Faculty of Veterinary Medicine, Sokoine University of Agriculture, Morogoro, Tanzania. LA - eng PT - Journal Article PL - Germany TA - Zentralbl Bakteriol Mikrobiol Hyg A JT - Zentralblatt fur Bakteriologie, Mikrobiologie, und Hygiene. Series A, Medical microbiology, infectious diseases, virology, parasitology JID - 8403032 RN - 0 (Enterotoxins) RN - 0 (Hydroxybenzoates) RN - 0 (Ionophores) RN - 0 (Iron Chelating Agents) RN - 0 (Siderophores) RN - 70D5FBB392 (2,3-dihydroxybenzoic acid) SB - IM MH - Animals MH - Colorimetry MH - Enterotoxins/biosynthesis MH - Hemagglutination MH - Hydroxybenzoates/*metabolism MH - Ionophores/*metabolism MH - Iron Chelating Agents/*metabolism MH - Salmonella/*metabolism MH - Siderophores EDAT- 1987/10/01 00:00 MHDA- 1987/10/01 00:01 CRDT- 1987/10/01 00:00 PHST- 1987/10/01 00:00 [pubmed] PHST- 1987/10/01 00:01 [medline] PHST- 1987/10/01 00:00 [entrez] AID - 10.1016/s0176-6724(87)80214-6 [doi] PST - ppublish SO - Zentralbl Bakteriol Mikrobiol Hyg A. 1987 Oct;266(3-4):338-46. doi: 10.1016/s0176-6724(87)80214-6.