A '''rat''' is a medium-sized [[rodent]] found on all inhabited [[continent]]s. They live on garbage in slums and are also often known to carry disease. The [[bubonic plague]] which killed one third the population of Europe is attributed to rats which carried plague-infected
+
A '''rat''' is a medium-sized [[rodent]] found on all inhabited [[continent]]s. They live on garbage in slums and are also often known to carry disease. The [[bubonic plague]] which killed one third the population of Europe is attributed to rats which [[disease carrier|carried]] plague-infected
fleas living in their fur. The [[taxonomy|genus]] ''Rattus'' includes over 50 species.
fleas living in their fur. The [[taxonomy|genus]] ''Rattus'' includes over 50 species.