Contagious Zeal has the following wording for the spell:
School enchantment (compulsion) [emotion, mind-affecting]; Level bard 2, cleric 3, inquisitor 3, psychic 3, sorcerer/wizard 3, spiritualist 3
Casting Time 1 standard action
Components V, S
Range close (25 ft. + 5 ft./2 levels)
Target one creature
Duration 1 round/level
Saving Throw Will negates (harmless); Spell Resistance yes (harmless)
The target gains a +2 morale bonus on attack rolls and weapon damage rolls, 1d6 temporary hit points, and a +4 morale bonus on saving throws against fear effects and to the DC of Intimidate checks attempted against her. Once per round, the target can select one other creature to gain this bonus as well. The chosen creature can be no farther from the target than 25 feet + 5 feet for every 2 caster levels you possess, and a creature can't be selected more than once in this way. Such allies gain only the bonuses and temporary hit points; they don't continue to spread it to other creatures. The additional creatures' bonuses and temporary hit points share the original spell's duration, so when that duration ends, all affected creatures lose their bonuses and any remaining temporary hit points from this spell.
The one question I have as a GM about this spell is this. What type of action is it to spread the buff to other PCs? I doubt it would be a standard action. So would it be a move, swift, immediate or free action?