We often think that education in general, and educating people on how bacteria spread, will get people to use their latrines. In the graph above, we are able to see latrine use by sex and level of education for people who live in households that have a latrine. The data are from the SQUAT Survey of sanitation attitudes and behaviors in the rural parts of 5 north Indian states. What the graph shows is that even among highly educated individuals who have a latrine, a sizeable proportion still defecate in the open.
Of course, more educated people are more likely to use the latrines they have than less educated people, and women are more likely to use their latrines than men at every level of education. But, what is striking is that close to 20% of men who have studied up to the 12th class still defecate in the open even though they have a latrine at home. A larger fraction of men in our sample who are 12th class graduates in households that own latrines defecate in the open than do all people in Ghana, Senegal, and Zambia.
Defecating in the open is very much a part of Indian culture, and is much harder to change than just through education. Just relying on teachers to teach germ-theory in schools may not do the trick.