Relationship between dog tissue <i>L. infantum</i> loads, time since infection, anti-<i>Leishmania</i> IgG, clinical status, and infectiousness.

Coefficients expressed as incidence rate ratios. Data fitted to random effects negative binomial regression models, with time since infection as a covariate. 1Model includes ln bone marrow parasite number as a covariate. 2Infectiousness to sandflies measured by xenodiagnosis. 3Dogs were classified according to their total clinical score as asymptomatic (scores 0–2), oligosymptomatic (3–6) and symptomatic (>6) at each bimonthly examination.