Following the first Arab-Israeli war, of 1948, rumours surfaced that the typhoid epidemic that struck the Arab town of Acre days before its fall on 18 May, had been caused by bacteria poured into the town’s water works by agents of the Haganah, the main Jewish militia. Later that month, the Egyptian government announced that it had caught two ‘Zionist’ operatives as they were trying to infect wells near Egyptian-occupied Gaza.
https://tinyurl.Com/Israel-bacteria-attack-Arabs