| studies on endoparasites of the black bear (ursus americanus) in the southeastern united states. | examination of 53 black bears (ursus americanus) from six states in the southeastern united states revealed at least 17 species of endoparasites, including sarcocystis sp., spirometra mansonoides (spargana), macracanthorhynchus ingens, ancylostoma caninum, arthrocephalus lotoris, baylisascaris transfuga, capillaria aerophila, capillaria putorii, crenosoma sp., cyathospirura sp., dirofilaria immitis, gnathostoma sp., gongylonema pulchrum, microfilariae, molineus barbatus, physaloptera sp. and str ... | 1978 | 418189 |
| helminths recovered from black bears in the peace river region of northwestern alberta. | a total of 91 free-ranging black bears (ursus americanus) from the peace river region of northwestern alberta was examined for helminths. four species, baylisascaris transfuga, taenia krabbei, taenia hydatigena and dirofilaria ursi, were found. none of the bears was heavily infected. results are compared with other similar north american surveys. | 1979 | 459048 |
| seasonal changes in the prevalence of ova of diphyllobothrium ursi and baylisascaris transfuga in the feces of the black bear (ursus americanus). | an analysis of 114 samples of feces from black bears (ursus americanus) from la verendrye park, quebec revealed that the prevalence of eggs of diphyllobothrium ursi and baylisascaris transfuga varied seasonally. d. ursi ova were most prevalent during the summer and fall and at their lowest in spring while the converse was true for b. transfuga. this phenomenon possibly is associated with the cessation of feeding during the winter denning of black bears. | 1978 | 567699 |
| ecto- and endoparasites of the black bear in northern wisconsin. | parasites collected from free-ranging black bears, ursus americanus, in northern wisconsin included dermacentor variabilis, d. albipictus, ixodes scapularis, demodex sp., trichodectes pinguis euarctidos, baylisascaris transfuga and dirofilaria ursi. mange, possibly caused by the demodex sp., also was observed. dental caries were common and periodontal disease was observed in one animal. | 1978 | 633522 |
| chemotherapy of helminthiasis among wild mammals. ii. baylisascaris transfuga (rudolphi, 1819) sprent, 1968 infection of polar bear. | effective chemotherapy by mebendazole of baylisascaris transfuga infection of five polar bears is reported and a control measure programme directed towards limiting the infection under the prevailing condition is discussed. | 1976 | 1015484 |
| parasites of black bears of the lake superior region. | parasites collected from free-ranging black bears, ursus americanus pallas, 1780, from northeastern minnesota or northern michigan include the dog tick, dermacentor variabilis (say, 1821), the winter tick, d. albipictus (packard, 1869), a louse, trichodectes pinguis euarctidoes hopkins, 1954, an ascarid worm, baylisascaris transfuga (rudolphi, 1819), a filarial worm, dirofilaria ursi yamaguti, 1941, taeniid tapeworms, and unidentified fleas. the broad fish tapeworm, diphyllobothrium latum (linna ... | 1975 | 1142551 |
| experimental infection in mice with larvae of baylisascaris transfuga (nematoda). | b. transfuga larvae migrated in livers, lungs and brains of experimentally infected mice. b. transfuga larvae have never been reported as etiologic agents of visceral larva migrans, but our results show that they have a migration in experimental paratenic hosts of a type that suggests their possible role in this syndrome. | 1990 | 2085208 |
| physicochemical characterization and monoclonal and polyclonal antibody recognition of baylisascaris procyonis larval excretory-secretory antigens. | baylisascaris procyonis larval excretory-secretory (es) antigens consisted of complex glycoproteins ranging from 10 kda to over 200 kda as determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis and lectin binding. five monoclonal antibodies (bapr1-bapr5) produced against b. procyonis es antigens were assayed by western blotting with larval es antigens from b. procyonis, baylisascaris melis, baylisascaris transfuga, ascaris suum, and toxocara canis. bapr1 and bapr2 recognized per ... | 1989 | 2668490 |
| biochemical and immunological systematics of some ascaridoid nematodes: genetic divergence between congeners. | vertical starch gel electrophoresis and trefoil immunodiffusion were used to study the systematics of some ascaridoid nematodes. within the ascarididae, the time scale of divergence was too great for intergeneric electrophoretic comparisons. congeneric electrophoretic comparisons of baylisascaris procyonis (host--raccoon) versus baylisascaris transfuga (host--black bear), and toxocara canis (host--domestic dog) versus toxocara cati (host--domestic cat) yielded nei genetic distance coefficients o ... | 1987 | 3114467 |
| meiosis and some aspects of cytological mechanisms of chromosomal sex determination in nematode species. | meiotic division in toxascaris leonina, baylisascaris transfuga, hexametra sp., toxocara canis, t. cati, heterakis gallinarum and physaloptera clausa of the class nematoda were studied. chromosomal sex determination type in different taxa is described. the xx-xo type of sex determination predominates in the species examined. a y chromosome occurs only in b. transfuga. a correlation between the number and length of sex chromosomes and autosomes in the different taxa was established. | 1995 | 7635621 |
| visceral larva migrans in mice experimentally infected with baylisascaris transfuga (ascarididae: nematoda). | laboratory bred albino mice, weighing 20 to 25 g, were orally infected with 2000 baylisascaris transfuga infective eggs each. mice were randomly chosen and sacrificed on days 1, 2, 3, 10, 15, 24 and 70 post-infection. samples of intestine, mesenteric lymph nodes, liver, lungs, heart, spleen, kidneys, uterus, brain and skeletal muscles were collected and processed for conventional histopathology. in the early infection the major necropsy findings were focal haemorrhages on the intestinal wall, li ... | 1994 | 7638005 |
| observations on the infectivity of baylisascaris transfuga eggs for mice. | to investigate the potential pathogenicity of baylisascaris spp. nematodes, mice were experimentally infected with baylisascaris transfuga eggs, which had been cultured in 0.1 n sulphuric acid, for a period in excess of 1 year. infectivity for mice appeared after 2 weeks in cultures (2.8%), peaked after 4 weeks (37.4%) and then waned over the next 18 months. the implications of b. transfuga as a possible agent of visceral larva migrans in animals and humans was demonstrated. | 1994 | 8171831 |
| helminths of the black bear, ursus americanus, in new brunswick. | between may 1989 and october 1991, 544 black bears ursus americanus were collected in new brunswick and examined for trichinella spiralis larvae. in addition, 110 of these bears were examined for filarial nematodes, and the entire intestinal tracts of 12 bears were examined for intestinal helminths. four species of helminths were identified from these bears, including trichinella spiralis, dirofilaria ursi, baylisascaris transfuga, and taenia krabbei. this represents the first documentation of t ... | 1994 | 8195953 |
| experimental infection in chickens with larvae of baylisascaris transfuga (nematoda: ascaridoidea). | the larvae of baylisascaris transfuga (rudolphi, 1819) were able to penetrate the liver, lungs, carcass and brain of infected chickens, but a great number of larvae accumulated in the liver. no clinical signs were seen. birds may serve as paratenic hosts of the parasite, but b. transfuga seems not to be a possible agent of avian cerebrospinal nematodosis. | 1993 | 8244206 |
| ocular larva migrans and histopathological lesions in mice experimentally infected with baylisascaris transfuga embryonated eggs. | the ability of baylisascaris transfuga larvae to cause ocular larva migrans (olm) in mice was examined. mice were given approximately 3500 infective eggs of b. transfuga per os. their eyes were removed and examined either microscopically or histologically at various intervals post-infection. larvae were recovered beginning 7 days after infection. histologically, free larvae were observed in the posterior chamber and within the ocular membranes. larval granulomas were present in the choroid with ... | 1996 | 8720568 |
| effect of ivermectin on the migration of baylisascaris transfuga larvae into the brain of mice. | | 1996 | 8768462 |
| parenteral infection in mice with baylisascaris transfuga (nematoda: ascaridae) infective eggs. | in order to investigate the ability of infective larvae of the nematode baylisascaris transfuga (rudolphi, 1819) sprent, 1968 to hatch from the egg-shells and then to migrate in tissues, parenteral infections of mice with embryonated eggs were performed. two groups of outbred albino mice were infected with approximately 3500 b. transfuga infective eggs subcutaneously (s.c.) or intraperitoneally (i.p.). b. transfuga larvae in the i.p. group rapidly hatched and migrated to the intestine, liver, lu ... | 1995 | 9599430 |
| parasitic helminths of black bear cubs (ursus americanus) from florida. | twenty-two florida black bear (ursus americanus floridanus) cubs (< or = 12 mo old) from florida were examined for endoparasites between 1998 and 2003. eleven species of helminths were found (8 nematodes, 2 trematodes, and 1 acanthocephalan). the most prevalent helminths were ancylostoma caninum (64%), macracanthorhynchus ingens (36%), strongyloides sp. (27%), baylisascaris transfuga (23%), and a. tubaeforme (14%). new host records include a. tubaeforme and brachylaima virginianum. this is the f ... | 2004 | 15040687 |
| larva migrans by baylisascaris transfuga: fatal neurological diseases in mongolian jirds, but not in mice. | raccoon roundworms (baylisascaris procyonis) and other baylisascaris species cause patent or latent larva migrans (lm) in a variety of mammals and birds, including humans. it is not clear whether lm by baylisascaris transfuga, roundworms of bears, is associated with clinical neurological disorders. to clarify this issue, icr and balb/c mice as well as mongolian jirds (meriones unguiculatus) were orally inoculated with 2,000-5,000 embryonated eggs of b. transfuga. in mice, the ascarid caused symp ... | 2004 | 15357068 |
| fatal baylisascaris larva migrans in a colony of japanese macaques kept by a safari-style zoo in japan. | a colony of japanese macaques (macaca fuscata fuscata) kept by a safari-style zoo in japan experienced 9 sporadic cases of fatal neurological diseases, such as epilepsy and posterior paralysis, during the 12 yr from 1989 to 2001. this macaque colony consisted of approximately 30 animals, on average, during this period, and the macaques shared their living space with ii american black bears (ursus americanus) harboring zoonotic roundworms (baylisascaris transfuga). close to this enclosure, a cote ... | 2005 | 16108577 |
| new insights into the morphology, molecular characterization and identification of baylisascaris transfuga (ascaridida, ascarididae). | species ranked within the genus baylisascaris (ascaridida, ascarididae) have been implicated in clinical and subclinical intestinal diseases in their natural hosts (e.g., raccoons and bears) as well as in life-threatening larva migrans syndromes in a number of incidental hosts, including humans. following the diagnosis of baylisascaris transfuga infestation in two captive polar bears, living in the zoo park of pistoia (tuscany, italy), nematodes (n=300; both sexes) have been characterized by mor ... | 2010 | 20947254 |
| occurrence of baylisascaris transfuga in wild populations of european brown bears (ursus arctos) as identified by a new pcr method. | the european brown bear (ursus arctos) is a species present in limited areas of europe and several small populations are considered endangered. this species can be affected by a range of parasites. in particular, the genus baylisascaris is an emerging parasite of wild animals which can cause severe larva migrans syndrome in aberrant hosts, which include 100 species of birds, mammals and also humans. baylisascaris transfuga is the species reported from bears, and with the exception of a few labor ... | 2011 | 21498002 |
| complete mitochondrial genomes of baylisascaris schroederi, baylisascaris ailuri and baylisascaris transfuga from giant panda, red panda and polar bear. | roundworms of the genus baylisascaris are the most common parasitic nematodes of the intestinal tracts of wild mammals, and most of them have significant impacts in veterinary and public health. mitochondrial (mt) genomes provide a foundation for studying epidemiology and ecology of these parasites and therefore may be used to assist in the control of baylisascariasis. here, we determined the complete sequences of mtdnas for baylisascaris schroederi, baylisascaris ailuri and baylisascaris transf ... | 2011 | 21621593 |
| comparative efficacy of ivermectin and levamisole for reduction of migrating and encapsulated larvae of baylisascaris transfuga in mice. | the comparative efficacy of 2 anthelmintics (ivermectin and levamisole) against baylisascaris transfuga migrating and encapsulated larvae was studied in mice. a total of 60 balb/c mice inoculated each with about 1,000 embryonated b. transfuga eggs were equally divided into 6 groups (a-f) randomly. mice of groups a and b were treated with ivermectin and levamisole, respectively, on day 3 post-infection (pi). mice of groups a-c were killed on day 13 pi. similarly, groups d and e were treated with ... | 2011 | 21738270 |
| an annotated catalogue of the ascaridoid nematode parasites of chinese vertebrates. | a catalogue, based on both examined specimens and the published literature, of all the ascaridoid nematodes recorded in china is presented. a total of 95 recognised species, representing 26 genera in five families, are reported. detailed information on the type-host, type-locality, original reference, synonyms, annotated subsequent references of taxonomic importance, other host records, site of infection, location of type-specimens and distribution are listed for each recognised species. additio ... | 2016 | 26739284 |
| experimental infection of mongolian gerbils with baylisascaris potosis. | the present study evaluated the pathogenicity of baylisascaris potosis, a newly described ascarid nematode, in mongolian gerbils. gerbils were infected with varying doses of either b. potosis or baylisascaris transfuga embryonated eggs (100, 1,000, and 4,000) for 30 days postinfection (pi). baylisascaris potosis-infected gerbils showed no clinical signs of disease; however, gerbils exposed to 1,000 and 4,000 b. transfuga eggs showed severe neurologic signs at 22-29 days and 14-15 days pi, respec ... | 2015 | 25014190 |
| granulomatous peritonitis in a european brown bear caused by baylisascaris transfuga. | we report a case of granulomatous peritonitis due to baylisascaris transfuga in a young male european brown bear (ursus arctus). at necropsy, there were extensive abdominal adhesions and extensive granulomatous tissue on the peritoneum and liver capsule. in the gastrointestinal tract, there were 58 nematodes that were identified as baylisascaris transfuga using light and scanning electron microscopy. | 2012 | 22493135 |
| helminths of the black bear in quebec. | twenty-one complete carcasses of black bears, ursus americanus , together with 34 intestinal tracts, 86 diaphragms and 168 faecal droppings collected between june, 1971 and november, 1972 in the province of quebec were examinel for helminths. species found and their prevalence were as follows: dirofilaria ursi in 57%; uncinaria yukonensis in 6%; baylisascaris transfuga in 21%; larvae of trichinella spiralis in less than 1%; diphyllobothrium ursi in 36%; and taenia krabbei and taenia hydatigena i ... | 1977 | 24228968 |