See also The Effect of Handwashing with Water or Soap on Bacterial Contamination of Hands by Maxine Burton, Emma Cobb, Peter Donachie, Gaby Judah, Val Curtis, and Wolf-Peter Schmidt (Department of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine)
people don’t use their hand when using a bidet? Gross! How do they know it’s clean if they don’t wipe?
Does it depend on the soap? Is normal (non-antibacterial) soap sufficient in this situation?
Possibly helpful: if you go to the English wikipedia article for ALP, then you click “languages” and change to the “Español” version of the same article, it takes you to the Spanish version wikipedia article for ALP.
The information in that article may be helpful.
I need both hands to cut lettuce