Trichobilharzia physellae (DIGENEA: SCHISTOSOMATIDAE) FROM ENDEMIC WATERFOWL ON THE HIGH PLAINS OF TEXAS

Pence, Danny B.; Rhodes, Mark

doi:10.7589/0090-3558-18.1.69

Cited by 14 publications

(18 citation statements)

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“…In an outbreak of schistosomiasis in captive black brant (Branta bernicla) in Ontario, eggs were consistently found in the liver and kidney, where they elicited lesions varying from none to marked granulomatous reactions (Wojcjnski et al, 1987). Liver lesions associated with schistosome infections in waterfowl included fibroplasias of the portal triads, a mixed inflammatory infiltrate in portal areas, and periphlebitis of the portal vein (Pence & Rhodes, 1982)-a picture very consistent with our observations. Pence and Rhodes (1982) found schistosomes in the portal veins but no evidence of eggs in tissue.…”

Section: Liver Mass and Histopathologysupporting

confidence: 86%

Health of Herring Gulls (Larus argentatus) in Relation to Breeding Location in the Early 1990s. II. Cellular and Histopathological Measures

Fox

Grasman

Campbell

2007

Journal of Toxicology and Environmental Health, Part A

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Organosomatic indices, hematological indicators of stress, and histopathological lesions were quantified for over 150 incubating herring gulls (Larus argentatus) sampled in 11 colonies throughout the Great Lakes and reference colonies in Lake Winnipeg and the Bay of Fundy. Of 21 parameters assessed, significantly more differed between Great Lakes colonies and reference colonies than between the two reference colonies. Relative adrenal, kidney, and liver masses of gulls from some Great Lakes colonies were reduced and thyroid masses increased relative to gulls from reference colonies. Foci of cellular atypia were observed in the hepatocytes of two Great Lakes gulls. Chronic periportal hepatitis, lipogranulomas and vacuolation of hepatocytes, and chronic granulomatous interstitial nephritis were more prevalent or severe in gulls from Great Lakes colonies and were associated with contaminants. The kidneys of gulls from the three most contaminated locations were damaged and functionally compromised. Interstitial nephritis was likely the most functionally significant histopathological lesion. Portal-tract fibrosis, granulomatous hepatitis, and kidney tubule dilation/obstruction and splenic enlargement were more prevalent or severe at reference sites and were associated with blood-borne parasites. Amyloid deposits were observed in the spleen, kidneys, or liver of nearly half of the gulls. Associations between the prevalence or severity of lesions and contaminant levels in gull tissues or the trophic level of their diet suggest some lesions are toxicopathic. Associations were most frequently found with planar halogenated aromatic hydrocarbons and lead. The stress response, as measured by the heterophil/lymphocyte ratio, was attenuated in gulls from Areas of Concern and associated with decreased adrenal mass. Our findings suggest that adult Great Lakes gulls suffered from chronic exposure to chemical stressors in the early 1990s sufficient to modulate endocrine function and physiological processes and induce structural changes in tissues.

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Section: Liver Mass and Histopathologysupporting

confidence: 86%

Health of Herring Gulls (Larus argentatus) in Relation to Breeding Location in the Early 1990s. II. Cellular and Histopathological Measures

Fox

Grasman

Campbell

2007

Journal of Toxicology and Environmental Health, Part A

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“…Granulomas were also observed in the duodenum and small intestine of pigeons infected with Ornithobilharzia canaliculata (16). Three species of ducks infected with T. physellae showed no associated tissue reaction in the vicinity of adults located in mesenteric veins, but a granulomatous reaction around the eggs was detected occasionally in the mucosa and submucosa of the intestine (219). On the other hand, the most serious lesions and fibroplasia of the portal triads and adjacent parenchyma were observed in the livers of those ducks and were attributed to mature T. physellae (219).…”

Section: Pathology Caused By Visceral Species In Birds and Mammalsmentioning

confidence: 87%

“…Three species of ducks infected with T. physellae showed no associated tissue reaction in the vicinity of adults located in mesenteric veins, but a granulomatous reaction around the eggs was detected occasionally in the mucosa and submucosa of the intestine (219). On the other hand, the most serious lesions and fibroplasia of the portal triads and adjacent parenchyma were observed in the livers of those ducks and were attributed to mature T. physellae (219). In the case of pigeons infected with O. canaliculata, granulomatous lesions surrounding collapsed eggs were observed in the liver parenchyma (16).…”

Section: Pathology Caused By Visceral Species In Birds and Mammalsmentioning

confidence: 99%

“…Intestinal pathology may be accompanied by poor nutritional conditions, as noticed in pigeons infected with O. canaliculata (16). Exceptionally, a more serious manifestation of the infection in naturally infected wild ducks was reported where the adults and eggs of T. physellae caused partial to complete paralysis of the cervical, wing, and leg muscles, foul-smelling diarrhea, and half-closed pasted eyelids (219).…”

Section: Pathology Caused By Visceral Species In Birds and Mammalsmentioning

confidence: 99%

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Avian Schistosomes and Outbreaks of Cercarial Dermatitis

et al. 2015

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SUMMARY Cercarial dermatitis (swimmer's itch) is a condition caused by infective larvae (cercariae) of a species-rich group of mammalian and avian schistosomes. Over the last decade, it has been reported in areas that previously had few or no cases of dermatitis and is thus considered an emerging disease. It is obvious that avian schistosomes are responsible for the majority of reported dermatitis outbreaks around the world, and thus they are the primary focus of this review. Although they infect humans, they do not mature and usually die in the skin. Experimental infections of avian schistosomes in mice show that in previously exposed hosts, there is a strong skin immune reaction that kills the schistosome. However, penetration of larvae into naive mice can result in temporary migration from the skin. This is of particular interest because the worms are able to migrate to different organs, for example, the lungs in the case of visceral schistosomes and the central nervous system in the case of nasal schistosomes. The risk of such migration and accompanying disorders needs to be clarified for humans and animals of interest (e.g., dogs). Herein we compiled the most comprehensive review of the diversity, immunology, and epidemiology of avian schistosomes causing cercarial dermatitis.

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“…Graczyk et al (1993) and Pence and Rhodes (1982) reported fatal schistosome infections in anatid birds caused by Trichobilharzia physellae in the USA. In Europe, Kolářová et al (2006) observed endophlebitis, inflammation of intestinal wall and also pathologies in the liver and lungs of whooper swans (Cygnus cygnus) infected with A. visceralis.…”

Section: Discussionmentioning

confidence: 99%

Bird schistosomes of wildfowl in the Czech Republic and Poland

Rudolfová¹,

Littlewood²,

Sitko³

et al. 2007

FOLIA PARASIT

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Abstract. In 2005, we dissected 102 wildfowl from the Czech Republic and 73 wildfowl from Poland including representatives of Anseriformes, Gruiformes and Gaviiformes. Schistosome infection was found in a total of 21 (29%) and 23 (23%) birds from Poland and the Czech Republic, respectively. All infected birds belonged to the order Anseriformes. The prevalences of nasal and visceral species were, respectively, 22% and 16% in Poland and 6% and 19% in the Czech Republic. Four species of schistosomes were found: Bilharziella polonica Kowalewski, 1895, Trichobilharzia regenti Horák, Kolářová et Dvořák, 1998, T. szidati Neuhaus, 1952, and an undetermined schistosome from the intestinal wall of Anas penelope L. The finding of T. szidati represents the first record of the parasite from natural final host since the species description.

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Trichobilharzia physellae (DIGENEA: SCHISTOSOMATIDAE) FROM ENDEMIC WATERFOWL ON THE HIGH PLAINS OF TEXAS

Cited by 14 publications

References 0 publications

Health of Herring Gulls (Larus argentatus) in Relation to Breeding Location in the Early 1990s. II. Cellular and Histopathological Measures

Health of Herring Gulls (Larus argentatus) in Relation to Breeding Location in the Early 1990s. II. Cellular and Histopathological Measures

Avian Schistosomes and Outbreaks of Cercarial Dermatitis

Bird schistosomes of wildfowl in the Czech Republic and Poland

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