I was diagnosed with food poisoning and UTI 3 days back. My blood count was neutrophils 80.80 and lympocytes 11.80. Is this the reason?

Probably. There are bacteria that could cause both food poisoning and UTI , or there is just coincidence an dhave two conditions in the same time . The numbers you listed are % and are not very usefull per se unless the total number of neutrophils is elevated.