"The neighbours told me within 30 minutes of eating their meal they were throwing up at 15 minute intervals. Shibu rang 111 and fainted through the conversation."
Toxin-releasing bacteria and other food poisoning organisms do NOT fit the bill with such (1) short time between ingestion and (2) very severe effect.
Look for yourself on this useful chart: http://www.foodborneillness.com/incubation-ranges.pdf
Accidental spicing with hemlock could however fit the bill, what with paralysis.
http://www.foodsafetynews.com/2015/0.../#.Wg4axEqWb4c
Interesting quote from WebMD, about eating animals that in turn have eaten hemlock:
(From: https://www.webmd.com/vitamins-suppl...ntname=hemlock )
"Hemlock is a very poisonous plant. In fact, all parts of the plant are toxic. Hemlock is most poisonous during the early stages of growth in the spring, but it is dangerous at all stages of growth. The poisons in hemlock are so deadly that people have died after eating game birds that had eaten hemlock seeds."
"Hemlock is native to Europe and western Asia and was introduced into North America as an ornamental plant. It is frequently found in the US and southern Canada. Hemlock typically grows near fences, roadsides, ditches, abandoned construction sites, pastures, crops, and fields, where it can be confused with harmless plants. Accidental poisonings have occurred when people mistook the root for parsnip, leaves for parsley, or seeds for anise."
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