Is it true that Indian culture does not place strong emphasis on hygiene?
 

Many people link the prevalence of filth and food poisoning in India to "cultural differences".

Is it true that India's culture does not stress personal hygiene highly enough?

Expectations of 1st world hygiene standards in the 3rd world are misplaced. Suggest you take college level instruction in microbiology.

Indian, Hindu, culture is very old, well established and now sports a billion people. You think their culture is mistaken?

Which Indians? The upper class? The emerging middle class? The farmers? The people who have to sleep on the street?

I would say that there is a lack of emphasis on PUBLIC hygiene, which is a different matter.