Heat map showing the (log10 scaled) reactivity of IgG anti-ganglioside Abs in acute canine polyradiculoneuritis (ACP) patients (n = 25; numbers), local non-neurological controls (n = 19; double letters), and dogs suffering from idiopathic epilepsy (OND, n = 15; single letters). Black corresponds to Ab-negative signals, whereas the intensity of Ab-reactivity increases over blue to green and red, with red corresponding to the strongest signals.