Sentence:  The Vives, like the strangles, is most <WSD>incident</WSD> to young horses, and usually proceeds from the same causes, such as catching cold, being over-heated, or over-worked, about the time of shedding their teeth. 
Meaning of the word marked with <WSD> tags:  Liable to happen; apt to occur; befalling; hence, naturally happening or appertaining.