Which of these can carry the lungworm Angiostrongylus vasorum?
You got zero out of three right.
Foxes, Slugs & Snails and Frogs can carry lungworm.
More than 25 species of terrestrial and aquatic snails and slugs have been demonstrated to be intermediate hosts. Frogs can also be part of the lungworm life cycle as they eat slugs and snails and become hosts. Foxes, like dogs can become infected with lungworm and have been implicated in the spread of lungworm across the country as they pass the parasite into the environment in their poo.