Investigations of peritoneal and intestinal infections of adult hookworms (Uncinaria spp.) in northern fur seal (Callorhinus ursinus) and California sea lion (Zalophus californianus) pups on San Miguel Island, California (2003).


:The peritoneal cavity (PNC) and intestine of northern fur seal (Callorhinus ursinus) pups and California sea lion (Zalophus californianus) pups that died in late July and early August, 2003, on San Miguel Island, California, were examined for hookworms. Prevalence and morphometric studies were done with the hookworms in addition to molecular characterization. Based on this and previous molecular studies, hookworms from fur seals are designated as Uncinaria lucasi and the species from sea lions as Uncinaria species A. Adult hookworms were found in the PNC of 35 of 57 (61.4%) fur seal pups and of 13 of 104 (12.5%) sea lion pups. The number of hookworms located in the PNC ranged from 1 to 33 (median = 3) for the infected fur seal pups and 1 to 16 (median = 2) for the infected sea lion pups. In addition to the PNC, intestines of 43 fur seal and 32 sea lion pups were examined. All of these pups were positive for adult hookworms. The worms were counted from all but one of the sea lion pups. Numbers of these parasites in the intestine varied from 3 to 2,344 (median = 931) for the fur seal pups and 39 to 2,766 (median = 643) for the sea lion pups. Sea lion pups with peritoneal infections had higher intensity infections in the intestines than did pups without peritoneal infections, lending some support for the hypothesis that peritoneal infections result from high-intensity infections of adult worms. There was no difference in intestinal infection intensities between fur seal pups with and without peritoneal infections. Female adult hookworms in the intestines of both host species were significantly larger than males, and sea lion hookworms were larger than those in fur seals. Worms in the intestine also were larger than worms found in the PNC. Gene sequencing and (RFLP) analysis of (PCR) amplified (ITS) ribosomal DNA were used to diagnose the species of 172 hookworms recovered from the PNC and intestine of 18 C. ursinus and seven Z. californianus hosts. These molecular data revealed that U. lucasi (hookworm of C. ursinus) and Uncinaria species A (of Z. californianus) infrequently mature in the intestine of the opposite host species in California rookeries. However, there is no support from molecular data for the hypothesis that cross-infection with "the wrong" Uncinaria species is a contributing factor in these cases of host peritonitis. The major significance of this research is the unusual finding of adult hookworms in the PNC of so many dead pups. No obvious explanation for this occurrence could be determined. Further research, like in the present study, should help understand and monitor the apparent ever changing role of hookworm disease in the health of northern fur seal and California sea lion pups on SMI.


Parasitol Res


Parasitology research


Lyons ET,Delong RL,Nadler SA,Laake JL,Orr AJ,Delong BL,Pagan C




Has Abstract


2011-09-01 00:00:00












  • Restoration of hookworm egg development after prolonged storage in stool suspension.

    abstract::Hookworm infection is still prevalent in southern Thailand despite control measures. Hookworm eggs submerged for an extended period under water from rainfall or in latrines may not survive, but they may recover their ability to develop into infective larvae when exposed to atmospheric air. This study examined the surv...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Na-Ek P,Sanpool O,Jongthawin J,Anamnart W,Intapan PM,Chamavit P,Maleewong W

    更新日期:2016-07-01 00:00:00

  • Echinococcus multilocularis metacestode metabolites contain a cysteine protease that digests eotaxin, a CC pro-inflammatory chemokine.

    abstract::In many helminthic infections, eotaxin, a CC-chemokine, triggers the mobilization of eosinophils, thus, contributing to an elevated blood and periparasitic eosinophil level. Following an experimental intraperitoneal infection of C57BL6 mice with Echinococcus multilocularis metacestodes, however, we observed the absenc...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Mejri N,Gottstein B

    更新日期:2009-10-01 00:00:00

  • Fasciola hepatica: tegumental surface alterations following treatment in vivo and in vitro with nitroxynil (Trodax).

    abstract::Male Sprague-Dawley rats were dosed orally with nitroxynil at a concentration of 40 mg/kg and adult Fasciola hepatica recovered after 24 h, 48 h and 72 h. Surface changes to the flukes were monitored by means of SEM. After the 24 h treatment, extensive swelling and blebbing of the tegument was observed on both surface...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: McKinstry B,Fairweather I,Brennan GP,Forbes AB

    更新日期:2003-10-01 00:00:00

  • Identification of differentially expressed genes in female Culex pipiens pallens.

    abstract::Culex pipiens pallens is the mosquito vector of a number of human pathogens such as Wuchereria bancrofti, Brugia malayi, and epidemic encephalitis B virus. Female C. pipiens pallens play an important role in transmitting pathogens by sucking blood, which is essential for reproduction. In the present study, a subtracti...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Chen HH,Zhang RL,Geng YJ,Cheng JQ,Zhang SX,Huang DN,Yu L,Gao ST,Zhu XQ

    更新日期:2007-08-01 00:00:00

  • Eimeria bovis infection enhances adhesion of peripheral blood mononuclear cells to and their transmigration through an infected bovine endothelial cell monolayer in vitro.

    abstract::The first schizogony of Eimeria bovis takes place in lymphatic endothelial cells of the ileum, resulting in the formation of macroschizonts within 2-3 weeks. In this study, we analyse early cellular immune responses to infected host cells on the basis of peripheral blood mononuclear cell (PBMC) adhesion on and transmi...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Taubert A,Zahner H,Hermosilla C

    更新日期:2007-08-01 00:00:00

  • Development of an indirect immunofluorescence technique for the diagnosis of toxoplasmosis in bottlenose dolphins.

    abstract::The diagnosis of toxoplasmosis is often complicated by the lack of specific clinical symptoms or postmortem features, in humans and other animals. The only diagnostic test described so far for the serological diagnosis of Toxoplasma gondii in marine mammals is the modified agglutination test (Dubey et al., Am J Vet Re...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Bernal-Guadarrama MJ,Salichs J,Almunia J,García-Parraga D,Fernández-Gallardo N,Santana-Morales MÁ,Pacheco V,Afonso-Lehmann RN,Déniz D,Lorenzo-Morales J,Valladares B,Martínez-Carretero E

    更新日期:2014-02-01 00:00:00

  • Invasion of Rh Null Cells by Plasmodium falciparum identifies a new invasion pathway.

    abstract::The malaria parasite, Plasmodium falciparum, invades the human erythrocyte through a complex interaction with erythrocyte receptors characterized by patterns of resistance to various enzymes. As invasion rates are influenced by blood group polymorphisms, we reasoned that the extremely rare rhesus null (Rh(null)) eryth...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Chung WY,Gardiner DL,Hyland C,Trenholme KR

    更新日期:2008-01-01 00:00:00

  • Molecular cloning and characterization of a novel ras-related protein (rap2) from Clonorchis sinensis.

    abstract::Ras are key components of diverse signal transduction pathways and play important roles in growth and development. To know about growth regulation in Clonorchis sinensis, we have identified a full-length sequence encoding a ras-related protein (rap2) from our adult cDNA library. The open reading frame contains 561 bp ...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Chen W,Wang X,Deng C,Lv X,Fan Y,Men J,Liang C,Yu X

    更新日期:2011-04-01 00:00:00

  • Repellent efficacy of a combination containing imidacloprid and permethrin against sand flies (Phlebotomus papatasi) in dogs.

    abstract::Infection in dogs and humans with the protozoan parasite Leishmania are widespread in tropical and subtropical countries around the globe. Sand flies of the order Phlebotomus in the Old World and Lutzomyia in the New World function as the vector of this disease. In dogs, skin lesions are the most prominent signs of ca...

    journal_title:Parasitology research

    pub_type: 临床试验,杂志文章


    authors: Mencke N,Volf P,Volfova V,Stanneck D

    更新日期:2003-07-01 00:00:00

  • The sensitivity of artesunate against Schistosoma japonicum decreased after 10 years of use in China?

    abstract::Artesuante (AS) is a good chemoprophylactic drug for preventing against schistosome infection, but Hua et al. recently reported that the sensitivity of AS against Schistosoma japonicum decreased after 10 years of use in China. There are at least three problems, to our knowledge, making the finding suspicious or inconc...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Liu R,Dong HF,Jiang MS

    更新日期:2012-04-01 00:00:00

  • Identification of Leishmania parasites in clinical samples obtained from cutaneous leishmaniasis patients using PCR-RFLP technique in endemic region, Sanliurfa province, in Turkey.

    abstract::Antroponotic cutaneous leishmaniasis (ACL) is an endemic disease and one of the major health problems in Sanliurfa province located in the southeastern region of Turkey. Leishmania tropica is confirmed as the causative agent of ACL in this region. In Sanliurfa city alone, the recorded total cases of ACL were 6,817 bet...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Akkafa F,Dilmec F,Alpua Z

    更新日期:2008-08-01 00:00:00

  • Association between Toll-like receptor 2 (TLR2) polymorphisms and asymptomatic bancroftian filariasis.

    abstract::Lymphatic filariasis is mainly caused by the filarial nematodes Wuchereria bancrofti and Brugia malayi. Wolbachia, intracellular symbiotic bacteria in filarial parasite, is known to induce immune response predominantly through Toll-like receptor 2 (TLR2). This study was performed to investigate the association between...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Junpee A,Tencomnao T,Sanprasert V,Nuchprayoon S

    更新日期:2010-09-01 00:00:00

  • Corvid birds (Corvidae) act as definitive hosts for Sarcocystis ovalis in moose (Alces alces).

    abstract::Epidemiological data and a unique phylogenetic position had suggested that Sarcocystis ovalis in moose and red deer might use a definitive host other than canids, felids, or humans. Corvid birds and rats were therefore evaluated as potential definitive hosts for this species in a small pilot study. Four laboratory rat...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Gjerde B,Dahlgren SS

    更新日期:2010-11-01 00:00:00

  • Thelohania montirivulorum sp. nov. (Microspora: Thelohaniidae), a parasite of the Australian freshwater crayfish, Cherax destructor (Decapoda: Parastacidae): fine ultrastructure, molecular characteristics and phylogenetic relationships.

    abstract::Thelohania montirivulorum sp. nov., a new species of microsporidian parasite, was found in a highland population of the Australian yabby, Cherax destructor. Data are presented on fine ultrastructure, developmental morphology and DNA sequence of the small subunit ribosomal DNA (SSU rDNA) and internal transcribed spacer...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Moodie EG,Le Jambre LF,Katz ME

    更新日期:2003-10-01 00:00:00

  • Molecular study on three morphotypes of Demodex mites (Acarina: Demodicidae) from dogs.

    abstract::Canine demodicosis is a severe and highly prevalent dermatologic disease in dogs. Pet dogs can be affected by three recognized Demodex species that can produce clinical effects. In this paper, three morphological types of Demodex mites have been isolated from Spanish dogs. A complete morphobiometrical study of each on...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: de Rojas M,Riazzo C,Callejón R,Guevara D,Cutillas C

    更新日期:2012-11-01 00:00:00

  • Silica nanoparticle: a potential new insecticide for mosquito vector control.

    abstract::Presently, there is a need for increased efforts to develop newer and effective methods to control mosquito vectors as the existing chemical and biological methods are not as effective as in earlier period owing to different technical and operational reasons. The use of nanomaterial products in various sectors of scie...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Barik TK,Kamaraju R,Gowswami A

    更新日期:2012-09-01 00:00:00

  • Dermatological and parasitological evaluation of infestations with chewing lice (Werneckiella equi) on horses and treatment using imidacloprid.

    abstract::Lice infestations in horses caused by the chewing louse Werneckiella (Damalinia) equi are observed worldwide. In the present study, the efficacy of 10% imidacloprid was tested on horses naturally infested with lice. Two groups of animals received a double application of 4 ml and 8 ml Advantage 10% spot-on on day 0 and...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Mencke N,Larsen KS,Eydal M,Sigurethsson H

    更新日期:2005-08-01 00:00:00

  • Soluble antigen derived from IV larva of Angiostrongylus cantonensis promotes chitinase-like protein 3 (Chil3) expression induced by interleukin-13.

    abstract::Angiostrongyliasis caused by Angiostrongylus cantonensis (A. cantonensis) is an emerging food-borne parasitic disease, which refers basically to eosinophilic meningitis. Chitinase-like protein 3 (Chil3), a member of chitinase-like protein family which has chemotactic activity for eosinophils, is reported to be highly ...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Wu F,Wei J,Liu Z,Zeng X,Yu Z,Lv Z,Sun X,Wu Z

    更新日期:2016-10-01 00:00:00

  • Amelioration of type 1 diabetes by recombinant fructose-1,6-bisphosphate aldolase and cystatin derived from Schistosoma japonicum in a murine model.

    abstract::Infection with helminth parasites or the administration of their antigens can prevent or attenuate autoimmune diseases. To date, the specific molecules that prime the amelioration are only limited. In this study, recombinant Schistosoma japonicum cystatin (rSjcystatin) and fructose-1,6-bisphosphate aldolase (rSjFBPA) ...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Yan K,Wang B,Zhou H,Luo Q,Shen J,Xu Y,Zhong Z

    更新日期:2020-01-01 00:00:00

  • Bioactivity of essential oils of Zingiber officinalis and Achyranthes aspera against mosquitoes.

    abstract::Due to the global health problems associated with mosquito-borne diseases, over two million people primarily in the tropical countries are at risk. The widely and commonly used chemical method though effective, has some major disadvantages making insect control practically difficult. In view of the above, it is unavoi...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Khandagle AJ,Tare VS,Raut KD,Morey RA

    更新日期:2011-08-01 00:00:00

  • Spermiogenesis in the pseudophyllid cestode Eubothrium crassum (Bloch, 1779).

    abstract::Spermiogenesis of the pseudophyllidean tapeworm Eubothrium crassum has been described by the aid of transmission electron microscopy for the first time. Initially, early spermatids form a distal cytoplasmic protrusion, a differentiation zone containing a small electron-dense, apically oriented region. Out of this regi...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Brunanská M,Nebesárová J,Scholz T,Fagerholm HP

    更新日期:2001-08-01 00:00:00

  • Dose- and time-dependent functional and structural damage to the colon mucosa by Entamoeba histolytica trophozoite lysates.

    abstract::Analysis of the initial interaction between Entamoeba histolytica trophozoites and the large intestine is impossible in humans and very difficult in experimental animals. To circumvent this obstacle we treated the luminal side of full-thickness rabbit colon segments mounted in Ussing-type chambers with trophozoite lys...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Navarro-García F,López-Revilla R,Tstusumi V

    更新日期:1993-01-01 00:00:00

  • The effect of dietary antioxidant supplementation in a vertebrate host on the infection dynamics and transmission of avian malaria to the vector.

    abstract::Host susceptibility to parasites is likely to be influenced by intrinsic factors, such as host oxidative status determined by the balance between pro-oxidant production and antioxidant defences. As a result, host oxidative status acts as an environmental factor for parasites and may constrain parasite development. We ...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Delhaye J,Glaizot O,Christe P

    更新日期:2018-07-01 00:00:00

  • Fasciola hepatica: disruption of spermatogenesis by the fasciolicide compound alpha.

    abstract::Sheep infected with the triclabendazole-susceptible Cullompton isolate of Fasciola hepatica were dosed with 15 mg/kg of compound alpha at 12 weeks post-infection. Adult flukes were recovered from the bile ducts at 24, 48, and 72 h post-treatment (p.t.). Changes to the spermatogenic cells in the testis were examined by...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: McConville M,Hanna RE,Brennan GP,McCoy M,Edgar HW,McConnell S,Castillo R,Hernández-Campos A,Fairweather I

    更新日期:2010-01-01 00:00:00

  • Ultrastructure of the body wall of Cystidicoloides ephemeridarum (Nematoda, Cystidicolidae) in relation to the histopathology of this nematode in salmonids.

    abstract::Light, scanning and transmission electron microscope examinations of adult Cystidicoloides ephemeridarum nematodes, parasitic in the stomach of brown trout (Salmo trutta fario L.), revealed that the body wall is composed of a cuticle, a hypodermis and longitudinally oriented somatic musculature. The body cuticle is co...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Frantová D,Moravec F

    更新日期:2003-09-01 00:00:00

  • Detection of Blastocystis hominis: a controversial human pathogen.

    abstract::Blastocystis hominis has been reclassified as a protozoan parasite. Its role as a human pathogen is somewhat controversial. There has been a dramatic increase in the frequency of B. hominis infection in association with diarrhea especially in immunocompromised hosts like AIDS patients, travelers, homosexuals, day care...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Basak S,Rajurkar MN,Mallick SK

    更新日期:2014-01-01 00:00:00

  • Bucephalidae (Platyhelminthes: Digenea) of Plectropomus (Serranidae: Epinephelinae) in the tropical Pacific.

    abstract::We examined four species of Plectropomus Oken, 1817 (Serranidae: Epinephelinae), Plectropomus areolatus (Rüppell), Plectropomus laevis (Lacepède), Plectropomus leopardus (Lacepède) and Plectropomus maculatus (Bloch) from sites off Heron Island and Lizard Island on the Great Barrier Reef, Australia (GBR), and the Gambi...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Bott NJ,Miller TL,Cribb TH

    更新日期:2013-07-01 00:00:00

  • Supplemental description and molecular characterization of Myxobolus miyarii Kudo, 1919 (Myxosporea: Myxobolidae) infecting intestine of Amur catfish (Silurus asotus).

    abstract::Myxobolus miyairii Kudo, 1919 was first reported from the intestines of the Amur catfish (Silurus asotus) in Japan and then in China and Russia, but with incomplete description. During the investigation of fish myxosporean diversity in Poyang Lake, the biggest lake along the Yangtze River, China, two Amur catfish high...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Liu XH,Zhang JY,Batueva MD,Voronin VN

    更新日期:2016-04-01 00:00:00

  • Oxidative stress and changes in liver antioxidant enzymes induced by experimental dicroceliosis in hamsters.

    abstract::The purpose of our study was to assess the effects of experimental dicroceliosis on the antioxidant defense capability of the liver in hamsters. Studies were carried out at 80 and 120 days after infection with an oral dose of 40 metacercariae of Dicrocoelium dendriticum. The parasitic pathology was ascertained by the ...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Sánchez-Campos S,Tuñón MJ,González P,González-Gallego J

    更新日期:1999-06-01 00:00:00

  • Assessment of the role of small mammals in the transmission cycle of tegumentary leishmaniasis and first report of natural infection with Leishmania braziliensis in two sigmodontines in northeastern Argentina.

    abstract::To contribute to the knowledge of the role of small mammals in the transmission cycle of tegumentary leishmaniasis caused by Leishmania braziliensis, we studied the small mammal community and its temporal and spatial association with phlebotominae, as well as small mammal infection by Leishmania spp. by PCR-RFLP analy...

    journal_title:Parasitology research

    pub_type: 杂志文章


    authors: Fernández MS,Fraschina J,Acardi S,Liotta DJ,Lestani E,Giuliani M,Busch M,Salomón OD

    更新日期:2018-02-01 00:00:00