▁his ▁military ▁career ▁he ▁had ▁blood ▁vom its , ▁such ▁as ▁before ▁the ▁Battle ▁of ▁Sal ta ; ▁he ▁was ▁almost ▁too ▁ill ▁to ▁particip ate ▁in ▁the ▁battle . ▁It ▁is ▁thought ▁that ▁those ▁vom its ▁origin ated ▁in ▁the ▁dig est ive ▁system ▁and ▁were ▁caused ▁by ▁stress , ▁and ▁not ▁in ▁the ▁resp ir atory ▁system , ▁because ▁the ▁vom its ▁were ▁sp or adic , ▁the ▁condition ▁did ▁not ▁become ▁chron ic , ▁and ▁it ▁eventually ▁c ured ▁itself . ▁Nothing ▁was ▁revealed ▁in ▁the ▁aut ops y . ▁ ▁Bel gr ano ▁also ▁experienced ▁pal ud ism ▁( mal aria ) ▁during ▁the ▁second ▁campaign ▁to ▁Upper ▁Peru . ▁On ▁ 3 ▁May ▁ 1 8 1 5 ▁he ▁informed ▁the ▁government ▁of ▁his ▁disease , ▁which ▁made ▁it ▁difficult ▁for ▁him ▁to ▁work ▁or ▁even ▁talk . ▁He ▁was ▁treated ▁by ▁doctor ▁Joseph ▁Read head , ▁who ▁employed ▁a ▁local ▁species ▁of ▁the ▁Cin ch ona ▁medic inal ▁plant . ▁The ▁disease ▁last ed ▁up ▁to ▁his ▁stay ▁in ▁Britain , ▁when ▁his ▁health ▁improved ▁because ▁of ▁the ▁treatment ▁and ▁by ▁having ▁left ▁the ▁en demic ▁zone . ▁ ▁He ▁also ▁experienced ▁st om ach ▁disease , ▁having ▁a ▁low ▁production ▁of ▁g astr ic ▁ac ids . ▁This ▁was ▁w ors ened ▁by ▁har sh ▁military ▁conditions , ▁including ▁long ▁periods ▁with ▁little ▁food . ▁The ▁first ▁references ▁to ▁the ▁disease ▁that ▁would ▁lead ▁to ▁his ▁death , ▁a ▁case ▁of ▁ed ema , ▁are ▁from