Abstract：
:The distribution of actin filaments in the spermatogenic cells of Fasciola hepatica was determined using a fluorescent derivative of phalloidin. Actin was localised primarily in the region of separation of a secondary spermatogonium from a primary spermatogonium, in the inner faces at the centre of four-cell clusters of tertiary spermatogonia and in the cytophore region of spermatocyte and spermatid rosettes. The effect of the microfilament inhibitor cytochalasin B (100 micrograms/ml) on the ultrastructure of the spermatogenic cells was determined in vitro by transmission electron microscopy using tissue-slice material. Cytochalasin B treatment led to the formation of bi- and multinucleate cells, whose frequency increased with progressively longer incubation periods. Few typical rosettes of spermatocyte and spermatid cells were evident from 6 h onwards, being replaced by syncytial masses of cells. Spermatozoon formation became abnormal in the longer treatment periods, the spermatozoa containing variable numbers of axonemes and an altered distribution of cortical microtubules. Multiple axonemes were observed in the cytoplasm of spermatid cells. The results are discussed in relation to the established role of actin in the cytokinesis phase of cell division and to the effects of cytochalasin B on other tissues and organ systems within the fluke.
journal_name
Parasitol Resjournal_title
Parasitology researchauthors
Stitt AW,Fairweather I,Johnston CFdoi
10.1007/BF00935425subject
Has Abstractpub_date
1991-01-01 00:00:00pages
123-8issue
2eissn
0932-0113issn
1432-1955journal_volume
77pub_type
杂志文章abstract：:Saprophytic soil fungi can exert ovicidal and ovistatic effects on helminths with differing degrees of efficiency. The representatives of such fungi from temperate regions, Paecilomyces lilacinus (Thom) Samson and P. marquandii (Masse) Hughes, exhibit recognized ovicidal activity on some nematodes. We evaluated the ac...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/pl00008513
更新日期：2000-10-01 00:00:00
abstract：:Suckling rabbits from six litters were orally inoculated at various ages with oocysts of Eimeria flavescens or Eimeria intestinalis. The total number of oocysts in the ceca served to estimate parasite reproduction. The rabbits at 14 and 16 days old remained uninfected, and in 19-day-old animals, low or no oocyst shedd...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-007-0646-0
更新日期：2007-10-01 00:00:00
abstract：:Haplosporidian spores from Ostrea edulis, previously described as Minchinia armoricana, were reexamined by light and electron microscopy. These spores were either free among host cells or enclosed in sporocysts. They contained two long epispore cytoplasm extensions (ECE), each possessing cytoskeletal structures corres...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s004360050669
更新日期：1999-12-01 00:00:00
abstract：:Avian malaria is of significant ecological importance and serves as a model system to study broad patterns of host switching and host specificity. The erythrocyte invasion mechanism of the malaria parasite Plasmodium is mediated, in large part, by proteins of the erythrocyte-binding-like (ebl) family of genes. However...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-012-3211-4
更新日期：2013-03-01 00:00:00
abstract：:Clonorchiasis, caused by Clonorchis sinensis infection, is a zoonotic parasitic disease of hepatobiliary system in which the proteins released by adult are major pathogenetic factors. In this study, we first characterized a putative sphingomyelin phosphodiesterase (CsSMPase) A-like secretory protein, which was highly ...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-013-3388-1
更新日期：2013-06-01 00:00:00
abstract：:Ultrastructural characters of the spermiogenesis and mature spermatozoon of Notopentorchis sp. (Cestoda, Cyclophyllidea, Paruterinidae), a parasite from Apus affinis (Aves, Apodiformes, Apodidae) from Gabon, are described by means of transmission electron microscopy. Cytochemical analysis for detection of glycogen was...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-011-2809-2
更新日期：2012-07-01 00:00:00
abstract：:Ticks are hematophagous ectoparasites which can transmit several diseases to the host during their feeding process. When ticks mechanically damage the tissue, they eventually induce inflammatory responses on the skin spot where they are fixed. One of the alternatives to control these ectoparasites is the use of chemic...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-013-3422-3
更新日期：2013-07-01 00:00:00
abstract：:The development of the fourth larval stage (L4) of Anisakis physeteris was studied using scanning electron microscopy (SEM), comparing it with third larval stage (L3) recently obtained from the host fish, blue whiting (Micromesistius poutassou), from the western Mediterranean Sea (east coast of Spain, zone FAO 37.1.1)...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-018-5896-5
更新日期：2018-07-01 00:00:00
abstract：:The aim of this study was to investigate the clinical efficiency of chemotherapy for the treatment of human alveolar echinococcosis (AE). Twenty-four patients who suffered from late-stage AE were enrolled in this study. The classification of the disease stages was performed according to the PNM (parasite lesion, neigh...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-013-3382-7
更新日期：2013-06-01 00:00:00
abstract：:Cryptosporidium and Giardia are ubiquitous parasites that infect humans and animals. Few reports are available on the prevalence of these two protozoan parasites in yaks (Bos grunniens). In this study, 344 faecal samples were collected from yaks with diarrhoea in the Chenduo and Nangqian counties of Qinghai Province, ...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-018-5861-3
更新日期：2018-06-01 00:00:00
abstract：:Schistosomiasis caused by different species of schistosome parasites is one of the most debilitating helminthic diseases of humans worldwide. For decades, chemotherapy is the main method of controlling schistosomiasis. However, the fear of drug resistance has motivated the search for alternatives. It has been demonstr...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-019-06224-x
更新日期：2019-03-01 00:00:00
abstract：:The impact of parasites on host population dynamics depends on local abundance of the parasites, which may vary considerably across spatial scales. In sand hopper populations, mermithid parasites have major impacts on host dynamics, which may vary among spatially separated populations due to the sand hopper's wide, pa...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-014-4254-5
更新日期：2015-03-01 00:00:00
abstract：:Cysteine proteases of parasite organisms play numerous indispensable roles in tissue penetration, feeding, immunoevasion, virulence, egg hatching and metacercarial excystment. They are critical key enzymes in the biology of parasites and have been exploited as serodiagnostic markers, therapeutic and vaccine targets. I...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-013-3627-5
更新日期：2014-01-01 00:00:00
abstract：:The origin, differentiation and functional ultrastructure of oncospheral or egg envelopes in Echinococcus multilocularis Leuckart, 1863 were studied by transmission electron microscopy (TEM) and cytochemistry. The purpose of our study is to describe the formation of the four primary embryonic envelopes, namely vitelli...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-017-5479-x
更新日期：2017-07-01 00:00:00
abstract：:A polymerase chain reaction (PCR) assay followed by partial sequencing of the 16S ribosomal RNA gene was performed for the presence of Ehrlichia and/or Anaplasma. A total of 242 ixodid ticks were collected from domestic ruminants and their shelters, as well as humans, and their individual salivary glands were dissecte...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-009-1377-1
更新日期：2009-04-01 00:00:00
abstract：:There are first data on nematodes of Anas platyrhynchos Linnaeus, 1758 (mallard) and Bucephala clangula Linnaeus, 1758 (common goldeneye) from Northern Europe (Ladoga Lake region). The ducks were found to be infected with nine nematode species. A. platyrhynchos hosted eight nematode species and B. clangula was host to...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-015-4697-3
更新日期：2015-10-01 00:00:00
abstract：:This is the first report of cryptosporidiosis in a bactrian camel (Camelus bactrianus) in China. Two Cryptosporidium isolates derived from the same bactrian camel (3-year-old) in November 2005 and April 2006 were characterized using sequence and phylogenetic analysis of the small-subunit rRNA (18S rRNA), 70-kDa heat s...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-007-0851-x
更新日期：2008-04-01 00:00:00
abstract：:Over 1 year, from January to December 1999, a total of 173 slaughtered sheep at Al-Mahala abattoir were examined for presence of nematode parasites. Eighteen sheep (10.4%) were infected with eight different species of nematodes. The prevalence rates of detected nematode parasites were; Haemonchus contortus (3.5%), Hae...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-010-2066-9
更新日期：2011-02-01 00:00:00
abstract：:Thus far, Entamoeba species have been classified based on morphology such as the number of nuclei in mature cysts and their hosts. Using recently developed molecular tools, ruminant Entamoeba spp. are currently classified into four species/genotypes: E. bovis and Entamoeba ribosomal lineages (RL) 1, 2, and 4. However,...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-017-5689-2
更新日期：2018-01-01 00:00:00
abstract：:Ticks are blood-feeding arthropods and can harbor several bacteria, including the worldwide zoonotic disease Q-fever agent Coxiella burnetii. Recent studies have reported a distinct group of Coxiella mostly associated with Ixodidae ticks, including the primary endosymbionts of Amblyomma americanum. In the present work...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-016-5230-z
更新日期：2016-12-01 00:00:00
abstract：:Although cystic echinococcosis (CE) is highly endemic in Bulgaria, there is still scarce information about species and/or genotypes of the Echinococcus granulosus complex that infect humans. Our study tackled the genetic diversity of E. granulosus complex in a cohort of 30 Bulgarian CE patients. Ten animal E. granulos...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-017-5386-1
更新日期：2017-03-01 00:00:00
abstract：:Phalloidin fluorescence technique, enzyme cytochemistry and immunocytochemistry in conjunction with confocal scanning laser microscopy have been used for the first time to describe the nervous and muscle systems of the viviparous monogenean gill parasite, Macrogyrodactylus clarii. The gross spatial arrangement of musc...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-004-1198-1
更新日期：2004-10-01 00:00:00
abstract：:In the State of Amazonas, American tegumentary leishmaniasis is endemic and presents a wide spectrum of clinical variability due to the large diversity of circulating species in the region. Isolates from patients in Manaus and its metropolitan region were characterized using monoclonal antibodies and isoenzymes belong...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-010-2139-9
更新日期：2011-03-01 00:00:00
abstract：:Ingestion of the larval nematode Angiostrongylus cantonensis can cause the human eosinophilic meningitis known as angiostrongyliasis. Analysis of the extracts and excretory-secretory (ES) products of A. cantonensis larvae and adult stages on gelatin substrate zymography demonstrated the presence of distinct gelatinoly...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-005-1484-6
更新日期：2005-12-01 00:00:00
abstract：:High resolution two-dimensional separation of Toxoplasma gondii tachyzoite lysate revealed up to 224 distinct protein spots in Coomassie-stained gel. Computional matching of 14 digitized gels yielded a standard two-dimensional proteome map. The excretory T. gondii dense granule proteins GRA1-GRA8, S16/acid phosphatase...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s004360000367
更新日期：2001-08-01 00:00:00
abstract：:Few data are available on the molecular characterization of Cryptosporidium spp. in cattle in China. In the present study, a total of 507 fecal specimens from six dairy farms in Heilongjiang Province were examined for Cryptosporidium spp. by light microscopy of concentrates from the formalin-ethyl acetate sedimentatio...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-009-1457-2
更新日期：2009-09-01 00:00:00
abstract：:Ultrastructure of spermiogenesis and mature spermatozoon of Cotylophoron cotylophorum are described with transmission electron microscopy. The description gives evidence of some characteristics of this digenean. The intercentriolar body situated between two striated roots and two centrioles exhibits a symmetric plane....
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-008-0944-1
更新日期：2008-06-01 00:00:00
abstract：:Tryptophan-N-formylated gramicidin A, a nonhemolytic derivative of the toxic peptide antibiotic gramicidin A, has previously been shown to induce potassium leakage from Plasmodium falciparum-infected erythrocytes in vitro and to inhibit the growth of the parasite. In the present study the antimalarial activities of tw...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/BF00932413
更新日期：1995-01-01 00:00:00
abstract：:Three monoclonal antibodies generated by immunization of mice with Plasmodium berghei-infected red blood cells were found to react with the 75-kDa heat-shock protein (HSP70) present in liver stages and erythrocytic forms of the parasites. These antibodies were shown to react with a recombinant protein encoding the car...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/BF00932618
更新日期：1994-01-01 00:00:00
abstract：:The existing armament of drugs for the treatment and prevention of malaria is inadequate due to development of resistance. In addition to this due to lack of economic enticement the rate of new drug development and new drug discovery in the segment of parasitic diseases is very low as compared to the other segments. T...
journal_title：Parasitology research
pub_type： 杂志文章
doi：10.1007/s00436-010-1789-y
更新日期：2010-05-01 00:00:00
