Leishmania is probiotic in the sand flies that carry it - protecting it from other deadly bacterial infections. User ivise, in the Neglected Diseases subreddit, 23 Jul 2014
Leishmania may be dangerous in humans, but in the sand fly that carries it, it is probiotic and protects the fly against other bacterial infections User ivise, in the Reddit Science subreddit, 23 Jul 2014