Abstract:
:The structure modulation of follicular cells and the ovarian changes during fourth larval instar and pupal stage of the malaria vector mosquitoes Anopheles pharoensis Theobald were investigated using the light and electron microscopy. The generative organs consist of a pair of polytrophic ovaries (OV), which are oblong, spindle-shaped bodies, lying dorsolaterally and occupying the region from the mid-fifth to the mid-sixth abdominal segment in the fourth larval instar, while in the pupal stage, each ovary (OV) is situated in the haemocoel of the sixth abdominal segment. It is an oblong body slightly larger in diameter; the lumen of the calyx becomes wider and central, and the pedicel (P) consists of one row of compact discoidal cells; meanwhile, in the fourth larval instar, the pedicel is without a lumen and consists of two rows of discoidal cells which are arranged as a short column between the follicle and calyx. The mean volume of the follicle in the fourth larval instar is 9.078 ± 3.0178 μm(3), meanwhile in the pupal stage being 12.051 ± 2.427 μm(3). The germarium (G) decreases in size in the pupal stage and contains a group of cells from which the oogonia differentiate, follicular cells which are similar to trophocytes, undifferentiated into one oocyte (O), which will develop into an egg and it is statistically the smallest one measured (0.058 ± 0.0041 μm(3), 0.303 ± 0.0086 μm(3)) in fourth larval instar and pupal stage, respectively as compared to the others within the follicle which will be accompanied as nurse cells (NC). The follicle is enclosed by a mononuclear flattened cells (follicular membrane), which have distinct boundaries. The vitellarium is differentiated into primary (F1) and secondary follicles (F2) in the pupal stage. The Golgi apparatus (GA) appears as discrete bits which are restricted to the perinuclear zone. The mitochondria (M) in the fourth larval instar are in the form of granules and short rods. They are perinuclearly distributed, forming a ring that surrounds the comparatively large nucleus. In the pupal stage, a similar condition to that described for the larva is observed, but with an increase in size and numbers, due to breaking up of rods into granules.
journal_name
Parasitol Resjournal_title
Parasitology researchauthors
Yamany AS,Adham FK,Mehlhorn Hdoi
10.1007/s00436-014-4099-ysubject
Has Abstractpub_date
2014-11-01 00:00:00pages
4233-41issue
11eissn
0932-0113issn
1432-1955journal_volume
113pub_type
杂志文章abstract::Drashia megastoma (Spirurida: Habronematidae) occurs in nodules in the stomach wall and rarely free in the stomach of the horse, mule and zebra throughout the world. D. megastoma develops in the housefly Musca domestica and causes gastric haemorrhage or even perforation of the stomach. Larvae of this nematode may be f...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-007-0558-z
更新日期:2007-09-01 00:00:00
abstract::With the objective of identifying the helminths of Paroaria coronata, 40 birds were necropsied, and their organs and contents were examined. The parasites were preserved in 70 masculineGL alcohol and prepared for identification using standard techniques. The helminth fauna found in P. coronata were Aproctella carinii,...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-009-1569-8
更新日期:2009-10-01 00:00:00
abstract::Albendazole (ABZ), a widely used anthelmintic, attributes its primary metabolite-albendazole sulfoxide (ABZSO)-as an effective agent against helminthes. For a purpose of long-lasting releasing ABZSO in a special lesion, the present study successfully manufactured ABZSO-loaded thermo-sensitive hydrogel, which was prove...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-016-5365-y
更新日期:2017-03-01 00:00:00
abstract::A case-control study was designed to investigate the role of different Cryptosporidium spp. in Swedish dairy herds with and without calf diarrhoeal problems. Faecal samples were collected from preweaned calves, young stock and cows. Cryptosporidium oocysts were detected by sodium chloride flotation and epifluorescence...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-010-2020-x
更新日期:2010-11-01 00:00:00
abstract::Gas-liquid chromatographic studies were done to determine the fatty acid composition of the digestive gland-gonad (DGG) complex of Helisoma trivolvis snails infected with the intramolluscan stages of Echinostoma trivolvis, of rediae freed from the DGG, of uninfected DGG, and of 41-day-old adult worms grown in golden h...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/BF00931585
更新日期:1993-01-01 00:00:00
abstract::Dengue is an arthropod-borne viral infection mainly vectored through the bite of Aedes mosquitoes. Recently, its transmission has strongly increased in urban and semi-urban areas of tropical and sub-tropical regions worldwide, becoming a major international public health concern. There is no specific treatment for den...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-015-4556-2
更新日期:2015-09-01 00:00:00
abstract::Toxoplasma gondii is of public health and veterinary importance causing severe diseases in immunocompromised individuals including HIV/AIDS patients and in congenital cases and animals. There is limited information on the epidemiology of T. gondii infection in humans, particularly HIV patients and food animals and the...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-017-5442-x
更新日期:2017-06-01 00:00:00
abstract::In order to assess the potential of the stem bark of Kigelia africana (Lam.) Benth as source of new anti-malarial leads, n-hexane and ethyl acetate (EtOAc) extracts and four compounds isolated from the stem bark were screened in vitro against the chloroquine-resistant W-2 and two field isolates of Plasmodium falciparu...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-011-2363-y
更新日期:2011-06-01 00:00:00
abstract::The essential oil of Cananga odorata flowers was evaluated for oviposition-deterrent, ovicidal, insecticidal, and repellent activities toward three mosquito species: Aedes aegypti, Anopheles dirus, and Culex quinquefasciatus. Oviposition deterrence of the oil was evaluated on gravid females using oviposition deterrenc...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-015-4699-1
更新日期:2015-12-01 00:00:00
abstract::In 2001, an international surveillance initiative was established, utilising a validated larval development inhibition assay to track the susceptibility of cat flea isolates to imidacloprid. In 2009, an Australian node was incorporated into the programme, joining laboratories in the United States and Europe. Field iso...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-013-3280-z
更新日期:2013-08-01 00:00:00
abstract::In an experiment including 8 groups of 15 mice, the effect of migrating Ascaris suum larvae in the lungs on the establishment and pathogenicity of aerosol exposure to Pasteurella multocida was investigated. Following aerosol exposure to P. multocida, mice with migrating A. suum in their lungs developed more severe pne...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/BF00931575
更新日期:1992-01-01 00:00:00
abstract::Intraspecific and interspecific effects on the growth and body size of helminths are rarely studied in natural situations, yet knowing what determines helminth sizes and thus fecundity is crucial to our understanding of helminth ecology and epidemiology. The determinants of average individual worm mass were investigat...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-002-0778-1
更新日期:2003-06-01 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::Little is known of the prevalence and genetic identity of Giardia duodenalis in sheep in Algeria. The present study aimed at characterizing G. duodenalis in lambs up to 6 months of age in Djelfa, Algeria. A total of 346 fecal specimens were collected from 28 farms and screened for G. duodenalis cysts by zinc sulfate f...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-020-06808-y
更新日期:2020-09-01 00:00:00
abstract::In the present study the behavior and pathogenicity of second-stage larvae of Toxocara canis were examined in different mouse strains with special emphasis on the major histocompatibility complex (MHC). Mice of the inbred strains BALB, C3H, C57BL, and DBA and the outbred strain NMRI were infected orally with 1000 seco...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/BF00932955
更新日期:1994-01-01 00:00:00
abstract::The present report describes the radioactive labeling of polar lipids in in vitro cultures of Plasmodium falciparum as well as their extraction with organic solvents and their partial characterization by chemical and enzymatic methods. All substances detected could be cleaved by alkali, suggesting that they were ester...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/BF00931698
更新日期:1992-01-01 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::Equine ocular setariasis arising mainly from ectopic infestation of Setaria digitata is a common vision impairing ophthalmic disease in India, and the identification of this filarial nematode is based solely on morphology. However, morphological characters alone are inadequate to detect and differentiate S. digitata f...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-019-06587-1
更新日期:2020-02-01 00:00:00
abstract::Cyclospora cayetanensis was identified as the cause of large outbreaks of diarrhea in many parts of the world, but its host range and reservoirs remains poorly defined. Recently, oocysts resembling the C. cayetanensis were detected in dairy cattle fecal specimens from China. The 18S rDNA from two of these Cyclospora-l...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-006-0380-z
更新日期:2007-04-01 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::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
doi:10.1007/s00436-016-5135-x
更新日期:2016-10-01 00:00:00
abstract::The efficacy of abamectin 1%, when injected subcutaneously in cattle at a dose of 200 micrograms/kg body weight, against the larval stages (grubs) of the fly Dermatobia hominis was evaluated in two trials in endemic areas of Brazil and Argentina. Eighteen Holstein x Brahman castrated males and 16 Brahman-cross with na...
journal_title:Parasitology research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/BF00931889
更新日期:1993-01-01 00:00:00
abstract::Tetracapsuloides bryosalmonae (Myxozoa) is the causative agent of proliferative kidney disease in various species of salmonids which are found in Europe and North America. Less information about the interactions of T. bryosalmonae proteins with salmonid proteins during parasite development is known. In this study, ant...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-015-4357-7
更新日期:2015-05-01 00:00:00
abstract::Atractolytocestus tenuicollis (Li, 1964) Xi, Wang, Wu, Gao et Nie, 2009 is a monozoic, non-segmented tapeworm of the order Caryophyllidea, parasitizing exclusively common carp (Cyprinus carpio L.). In the current work, the first molecular data, in particular complete ribosomal internal transcribed spacer 2 (ITS2) and ...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-013-3516-y
更新日期:2013-10-01 00:00:00
abstract::In the search of alternatives for the control of mosquitoes of medical importance, we evaluated the larvicidal activity of micronized suspensions of calcium hydroxide [Ca(OH)₂] against Aedes aegypti and Culex quinquefasciatus. Tests conducted under laboratory conditions determined a LC50 = 0.027% (LC90 = 0.096%) for A...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-011-2593-z
更新日期:2012-03-01 00:00:00
abstract::Diversity in parasite virulence is one of the factors that contribute to the clinical outcome of malaria infections. The association between the severity of Plasmodium falciparum malaria and the number of distinct parasite populations infecting the host (multiplicity of infection) or polymorphism within any of the spe...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-013-3325-3
更新日期:2013-04-01 00:00:00
abstract::In three different areas in northern Germany, hippoboscids were collected from red deer (Cervus elaphus). Typanosomatids were demonstrated in the midgut and hindgut of 9/37 Lipoptena cervi. The trypanosomatids were morphologically similar to vector forms of the subgenus Megatrypanum that had been found in tabanids at ...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/BF00928691
更新日期:1991-01-01 00:00:00
abstract::Eimeria spp. multiply within the intestinal tract causing severe inflammatory responses. Chitosan (CS), meanwhile, has been shown to exhibit anti-inflammatory activities in different experimental models. Here, we investigated the effect of CS on the outcome of inflammation caused by Eimeria papillata in the mouse inte...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-016-5035-0
更新日期:2016-07-01 00:00:00
abstract::Morphology of capsules surrounding acanthocephalan Corynosoma strumosum in paratenic hosts (sea fishes of three species from the northern part of the Sea of Okhotsk) was studied. A thick layer of glycocalyx is formed on the surface of acanthocephalan's tegument in smelts Osmerus mordax dentex and Hypomesus olidus; the...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-010-2088-3
更新日期:2011-02-01 00:00:00
abstract::The chemical factors involved in oviposition site selection by mosquitoes have become the focus of interest in recent years, and considerable attention is paid to the chemical cues influencing mosquito oviposition. Studies on synthetic oviposition attractants/repellents of long-chain fatty acid esters against Anophele...
journal_title:Parasitology research
pub_type: 杂志文章
doi:10.1007/s00436-008-1189-8
更新日期:2009-01-01 00:00:00