Trichinella nativa , T. spiralis , and T. murrelli . Also worm waste products. Inflammation, pain, diarrhea, fever, nausea, sweating, occasionally respiratory difficulty and red blotches on skin. Muscle pain, difficulty in swallowing, difficulty in breathing, weakening of pulse and blood pressure which can result in heart damage, swelling of esophagus, swelling of masseters. Can lead to respiratory failure because damage to diaphragm and intercostals.
Tissue digests away and thrashing larvae left.
Further clinical signs, including weight loss, irritability, anemia, weakness, and increased frequency of urination may or may not be present. Worms occasionally penetrate renal capsule and wander in peritoneal cavity. Rarely, the adults may attempt to migrate through the ureters causing severe pain and irritation Eustrongylides spp. About 11-12 species that live in tumors in wall of proventriculus of fish eating birds. In some species, the L3 emerges, and the L4 and adults are free-living in the environment.