



... just about anything that comes off the top of my head, which, as you can see, does not provide much in the way of substance ...





"Robert L. Haley I, 59, went home to be with the Lord January 15, 2008. Bob was born in Akron to the late Ruth and Thomas. He was a 1966 graduate of Kenmore High. He served in the Marines from 1969 to 1971. He was father to Robert (Debra), and Michael (Gucela); brother to Julie, Lilly, and Thomas; loving husband to Beth. Family will receive friends 6 p.m. Saturday, January 26, 2008 at The Chapel, 135 Fir Hill, Akron, with a memorial service at 7 p.m."
Life Cycle: Gravid proglottids are passed intact in the feces or emerge from the perianal region of the host [1]. Subsequently they release typical egg packets [2]. On rare occasions, proglottids rupture and egg packets are seen in stool samples. Following ingestion of an egg by the intermediate host (larval stages of the dog or cat flea Ctenocephalides spp.), an oncosphere is released into the flea's intestine. The oncosphere penetrates the intestinal wall, invades the insect's hemocoel (body cavity), and develops into a cysticercoid larva [3]. The larva develops into an adult, and the adult flea harbours the infective cysticercoid [4]. The vertebrate host becomes infected by ingesting the adult flea containing the cysticercoid [5]. The dog is the principal definitive host for Dipylidium caninum. Other potential hosts include cats, foxes, and humans (mostly children) [6], [7]. Humans acquire infection by ingesting the cysticercoid contaminated flea. This can be promulgated by close contact between children and their infected pets. In the small intestine of the vertebrate host the cysticercoid develops into the adult tapeworm which reaches maturity about 1 month after infection [8]. The adult tapeworms (measuring up to 60 cm in length and 3 mm in width) reside in the small intestine of the host, where they each attach by their scolex. They produce proglottids (or segments) which have two genital pores (hence the name "double-pored" tapeworm). The proglottids mature, become gravid, detach from the tapeworm, and migrate to the anus or are passed in the stool [1].
A nine year-old Brazilian boy, displaying the hookworms and tapeworms he expelled when treated by the Rockefeller Foundation staff.
Life Cycle: Immature eggs are passed in feces [1]. Under appropriate conditions, the eggs mature (approximately 18 to 20 days) [2] and yield oncospheres which develop into a coracidia [3]. After ingestion by a suitable freshwater crustacean (the copepod first intermediate host) the coracidia develop into procercoid larvae [4]. Following ingestion of the copepod by a suitable second intermediate host, typically minnows and other small freshwater fish, the procercoid larvae are released from the crustacean and migrate into the fish flesh where they develop into a plerocercoid larvae (sparganum) [5]. The plerocercoid larvae are the infective stage for humans. Because humans do not generally eat undercooked minnows and similar small freshwater fish, these do not represent an important source of infection. Nevertheless, these small second intermediate hosts can be eaten by larger predator species, e.g., trout, perch, walleyed pike [6]. In this case, the sparganum can migrate to the musculature of the larger predator fish and humans can acquire the disease by eating these later intermediate infected host fish raw or undercooked [7] . After ingestion of the infected fish, the plerocercoid develop into immature adults and then into mature adult tapeworms which will reside in the small intestine. The adults of D. latum attach to the intestinal mucosa by means of the two bilateral groves (bothria) of their scolex [8]. The adults can reach more than 10 m in length, with more than 3,000 proglottids. Immature eggs are discharged from the proglottids (up to 1,000,000 eggs per day per worm) [9] and are passed in the feces . Eggs appear in the feces 5 to 6 weeks after infection. In addition to humans, many other mammals can also serve as definitive hosts for D. latum.
Life Cycle : Adult stages of Anisakis simplex or Pseudoterranova decipiens reside in the stomach of marine mammals, where they are embedded in the mucosa, in clusters. Unembryonated eggs produced by adult females are passed in the feces of marine mammals [1]. The eggs become embryonated in water, and first-stage larvae are formed in the eggs. The larvae molt, becoming second-stage larvae [2a], and after the larvae hatch from the eggs, they become free-swimming [2b]. Larvae released from the eggs are ingested by crustaceans [3]. The ingested larvae develop into third-stage larvae that are infective to fish and squid [4]. The larvae migrate from the intestine to the tissues in the peritoneal cavity and grow up to 3 cm in length. Upon the host's death, larvae migrate to the muscle tissues, and through predation, the larvae are transferred from fish to fish. Fish and squid maintain third-stage larvae that are infective to humans and marine mammals [5]. When fish or squid containing third-stage larvae are ingested by marine mammals, the larvae molt twice and develop into adult worms. The adult females produce eggs that are shed by marine mammals [6]. Humans become infected by eating raw or undercooked infected marine fish [7]. After ingestion, the anisakid larvae penetrate the gastric and intestinal mucosa, causing the symptoms of anisakiasis.