Which of the following nematodes below is zoonotic?

For Fasciola hepatica, select the statement that is TRUE

For Alaria spp, select the statement that is TRUE

Cutaneous larval migrans (CLM) in humans is caused by Strongyloides stercoralis and Ancylostoma tubaeforme

The stage of hookworms that is infective for the definitive host is the following:

The adult worms of Paragonimus kellicotti and Fasciola hepatica infect the liver of the definitive host.

Heterobilharzia americana, which has dogs as a definitive host, can infect humans and cause swimmer’s itch / swamp itch.

Why is colonization considered the most difficult step in the metastasis-invasion cascade?

A client brings in their dog, who is suffering  from a chronic cough that is hard and dry.  Sometimes the dog also retches, particularly after exercising.   A bronchoscopy is done and nodules in the trachea are noted, similar to the ones shown below. What nematode is responsible for this pathology?

What best describes micrometastasis in the context of the metastasis-invasion cascade?