300 – 600 hours
||Bacteria Mycobacterium leprae
||Gibson B, Wilson DJ, Feil E, Eyre-Walker A. The distribution of bacterial doubling times in the wild. Proc Biol Sci. 2018 Jun 13 285(1880). pii: 20180789. doi: 10.1098/rspb.2018.0789 p.6 left column 4th paragraphPubMed ID29899074
|| Shepard CC. 1960 The experimental disease that follows the injection of human leprosy bacilli into foot-pads of mice. J. Exp. Med. 112, 445–454  Rees RJ. 1964 Limited multiplication of acid-fast bacilli in the foot-pads of mice inoculated with Mycobacterium leprae. Br. J. Exp. Pathol. 45, 207–218  Levy L. 1976 Bactericidal action of dapsone against Mycobacterium leprae in mice. Antimicrob. Agents Chemother. 9, 614–617.PubMed ID19867175, 14140757, 773300
||P.6 left column 4th paragraph: "There is also independent evidence that there are some bacteria that divide slowly in their natural environment. The aphid symbiont Buchnera aphidicola is estimated to double every 175–292 h in its host [BNID 115546], and Mycobacterium leprae doubles every 300–600 h on mouse footpads [primary sources], not its natural environment, but one that is probably similar to the human skin."