“…2 3 4 5 6 7 8 9 DAYS FIGURE I Temperature chart in leptospirosis (australis B); no antibiotic therapy given Clinical accounts of leptospirosis usually state that the pulse rate, while increased, is not in proportion to the temperature (for example, Broom 1953b). Some observers have ascribed the relative bradycardia to jaundice when it is present (Haunz and Cardy, 1952). In the present series patients with a relatively low pulse rate at the height of fever usually proved to have low resting pulse rates in convalescence; whether that represented their normal pulse rate is, of course, debatable.…”