Referencias.

http://www.sanar.org/ets/sifilis

http://suite101.net/article/clamidia-trachomatis-contagio-sintomas-tratamiento-y-causas-a38631#.Vvf2eNLhAb0

                                 

https://www.nlm.nih.gov/medlineplus/spanish/cryptosporidiosis.html

http://www.cdc.gov/std/spanish/tricomoniasis/stdfact-trichomoniasis-s.htm

http://www.uv.es/=vicalegr/PTindex/PTSarna.html

http://holadoctor.com/es/vih-y-sida/vihsida-qu%C3%A9-es-causas-tratamiento-y-prevenci%C3%B3n

https://www.nlm.nih.gov/medlineplus/spanish/sexuallytransmitteddiseases.html