Commensalism (symbiotic relationship) One organism receives the benefits while the
other is not affected
Facultative vs obligatory
Parasitism (symbiotic relationship) Two organisms of different species in which on
member lives on or within the other and may cause harm
Parasite becomes metabolically dependent on the host
Moraxella bovis Infectious bovine keratoconjunctivitis in cattle (pink-eye or New Forest
disease) carried from one cow to the other on the sticky potpads of the face fly, Musca
autumanlis
Parasitiasis Parasite present on host and is potentially pathogenic (harmful), but animal
exhibits no outward signs
Parasitosis Parasite present on host and exhibits obvious outward signs and harm
, Parasitology Exam 1 Questions And Answers
Ectoparasite A parasite that feeds on the external surface of a host.
Produces infestation on the host
Endoparasitism parasite lives inside of the host, feeds on blood, soft tissues, or ingested
food of host
Produces infection within the host
Parasiticides Chemical compounds used to treat specific internal and external parasites
Anthelmintics used to treat worm infections
Roundworms, tapeworms, flukes, and thronyheaded worms
Ex. pyrantel, praziquantel