. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 314 CALIFORNIA FISH AND GAME First-stage larvae average [x in length and have an undulating tail, with a very small dorsal spine (Figure 6). The larvae are very active and can be found in great numbers in the lung both in the nodules and free in the alveoli. Larvae are coughed up and swallowed and may tlien be found in the intestines and in the mucus coating the fecal pellets. First-stage larvae are resistant to changes of extern
. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. 314 CALIFORNIA FISH AND GAME First-stage larvae average [x in length and have an undulating tail, with a very small dorsal spine (Figure 6). The larvae are very active and can be found in great numbers in the lung both in the nodules and free in the alveoli. Larvae are coughed up and swallowed and may tlien be found in the intestines and in the mucus coating the fecal pellets. First-stage larvae are resistant to changes of external environment. Larvae remained alive at least 12 months in refrigerated water. Larvae frozen at 0 F were viable after 165 days and larvae allowed to dr}' on fecal pellets at room temperature were viable after 7 montlis. Tliis seemed to be related to the amount of mucus coating the pellets, whicli apparently had a protective effect. Washed larvae survived drying for only 16 days. It is apparent that first-stage larvae could survive after being passed by deer for extremely long periods of time in what might amount to a free-living stage. PATHOLOGY Although adult nematodes cause only a small amount of damage in the muscuh^ture, a great deal of pathology is produced by ova and larvae in the lymph nodes and lungs. The ova and larvae are in granuloma-like nodules scattered throughout the lung tissue. These granulomas seem to be produced by proliferation of septal and inter- stitial cells. Occasional giant cells are seen. Capillary hyperemia occurs in the alveolar walls. Ova and larvae occur individually and in groups, surrounded by a fibrous FIGURE 7—Section of deer lung showing granulomas containing ova and larvae of P. odocoilei. Photograph by WiHiarn E. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the ori
Size: 1745px × 1432px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcaliforniadeptoffishandgame, bookauthorcaliforniafish
