question: Which species from the deer family move solitarily and are susceptible to the Parelaphostrongylus tenuis parasite?
answer: moose
context: Title: Procambarus tenuis
  Passage: Procambarus tenuis is a species of crayfish in the genus "Procambarus" in the family Cambaridae.  It is the only species in the subgenus Procambarus (Tenuicambarus).  "P. tenuis" is rare throughout its range, which is restricted to the Ouachita Mountains of Le Flore County, Oklahoma and Polk County, Arkansas.
  Title: Moose
  Passage: The moose (North America) or elk (Eurasia), "Alces alces", is the largest extant species in the deer family.  Moose are distinguished by the broad, flat (or "palmate") antlers of the males; other members of the family have antlers with a dendritic ("twig-like") configuration.  Moose typically inhabit boreal forests and temperate broadleaf and mixed forests of the Northern Hemisphere in temperate to subarctic climates. Hunting and other human activities have caused a reduction in the size of the moose's range over time.  Moose have been reintroduced to some of their former habitats.  Currently, most moose are found in Canada, Alaska, New England, Fennoscandia, Baltic States, and Russia.  Their diet consists of both terrestrial and aquatic vegetation.  The most common moose predators are the gray wolf along with bears and humans. Unlike most other deer species, moose are solitary animals and do not form herds.  Although generally slow-moving and sedentary, moose can become aggressive and move quickly if angered or startled.  Their mating season in the autumn features energetic fights between males competing for a female.
  Title: Elk
  Passage: The elk, or wapiti ("Cervus canadensis"), is one of the largest species within the deer family, Cervidae, in the world, and one of the largest land mammals in North America and Eastern Asia.  This animal should not be confused with the still larger moose ("Alces alces") to which the name "elk" applies in British English and in reference to populations in Eurasia.  Apart from the moose, the only other member of the deer family to rival the elk in size is the south Asian sambar ("Rusa unicolor").
  Title: Moose sickness
  Passage: Moose sickness is a degenerative condition that occurs in moose populations in central and eastern North America that have been infected with the parasitic worm Parelaphostrongylus tenuis.  The disease is characterized by stumbling, aimlessness and other odd behavior and is often fatal.
  Title: Parelaphostrongylus tenuis
  Passage: Parelaphostrongylus tenuis (also known as meningeal worm, brainworm, or moose illness) is a neurotropic nematode parasite common to white-tailed deer, "Odocoileus virginianus", which causes damage to the central nervous system.  Moose ("Alces alces"), elk ("Cervus canadensis"), caribou ("Rangifer tarandus"), and mule deer ("Odocoileus hemionus") are also susceptible to the parasite but are aberrant hosts and are infected in neurological instead of meningeal tissue.  The frequency of infection in these species increases dramatically when their ranges overlap high densities of white-tailed deer.
citations: Parelaphostrongylus tenuis Moose