Histamine protection in guinea-pigs produced by plant tumour extracts.
Stable extracts were obtained from plant tumours, such as Hungarian oak galls and crown galls of infected tomato plants, which, injected intraperitoneally into guinea-pigs, protected the animals against a subsequent histamine aerosol. The protection produced by the oak gall extracts lasted for a few days and that produced by the crown gall extracts, if injected in sufficient amounts, sometimes for a few weeks.
D000818:Animals; D006168:Guinea Pigs; D006632:Histamine / Q000633:toxicity*; D018551:Solanum lycopersicum; D010936:Plant Extracts; D061066:Plant Pathology; D010941:Plant Tumors; D010944:Plants / Q000821:virology*; D014780:Viruses
D010936:Plant Extracts; D006632:Histamine
HISTAMINE/toxicology; PLANTS/virology; VIRUSES