John S. McCain Jr. entered the submarine service.
The Toxocaridae are a zoonotic family of parasitic nematodes that infect canids and felids and which cause toxocariasis in humans -LRB- visceral larva migrans and ocular larva migrans -RRB- .. zoonotic. zoonotic. family. family ( biology ). parasitic. parasitic. toxocariasis. toxocariasis. visceral larva migrans. visceral larva migrans. The worms are unable to reproduce in humans .. Four important species include  :. Toxocara canis , which infects dogs .. Toxocara canis. Toxocara canis. Toxocara cati , which infects cats and lacks intermediate hosts .. Toxocara cati. Toxocara cati. Toxascaris leonina , which infects mostly cats , but also dogs .. Toxascaris leonina. Toxascaris leonina. Toxocara vitulorum , which infects buffalo and cattle .. Toxocara vitulorum. Toxocara vitulorum