| studies on the interrelation between rodents and their ectoparasitic acarines in riyadh region, saudi arabia. | the ectoparasitic acarines of commensal and wild rodents collected from various areas in riyadh region were four species of mites (laelaps nutalli, ornythonyssus bacoti, cheyletus eruditus and articholaelaps glasgowi), and two species of ticks. (immature stages) rhipicephalus spp. and hyalomma spp. in urban areas the highest infestation rate by mites was 49.9% on rattus rattus followed by 18.5% on rattus norvegicus. the highest rat-mite index was 2.3 on r. rattus followed by 1.3 on r. norvegicus ... | 1993 | 8308342 |
| studies on the ectoparasites (fleas and lice) on rodents in riyadh and its surroundings, saudi arabia. | a survey was conducted on rodents from the riyadh city and surroundings. two species of fleas, xenopsylla cheopis and ctenocephalides felis felis together with polyplax spinulosa were collected. the highest infestation rate by both fleas occurred on rattus rattus followed by rattus norvegicus and mus musculus. females of r. rattus and r. norvegicus were more infested by fleas than males. on the other hand, meriones spp., gerbillus spp., jaculus jaculus and acomys dimidiatus were infested with x. ... | 1993 | 8308348 |
| cytochrome b sequences reveal acomys minous (rodentia, muridae) paraphyly and answer the question about the ancestral karyotype of acomys dimidiatus. | sequences of the cytochrome b (cyt b) mitochondrial gene show that the spiny mouse acomys from crete, known as the endemic species a. minous, is composed of two distinct maternal lineages ("a" and "b"). group "a" sequences cluster with a. nesiotes (cyprus) and group "b" sequences cluster with a. cilicicus (turkey), which is evidence of paraphyly of a. minous in regard to these two species. from cyt b sequences, the three taxa are very closely related to a. cahirinus (egypt): the maximum divergen ... | 2001 | 11161740 |
| rodents and their ectoparasites in wadi hanifah, riyadh city, saudi arabia. | a survey was conducted on commercial and wild rodents from different locations in wadi hanifah in riyadh. six species of rodents were collected with wire net traps baited with fresh cucumber or fatty cheese. the trapped rodents in descending order of numbers were rattus rattus rattus, acomys dimidiatus, meriones libycus, r. r. frugivorus, r. r. alexandrinus and mus musculus. the ectoparasites were a flea, xenopsyllus sp. on r. r. frugivorus and a tick, rhipicephalus turanicus on each of a. dimid ... | 2001 | 11775100 |
| variation in the helminth community structure in spiny mice (acomys dimidiatus) from four montane wadis in the st katherine region of the sinai peninsula in egypt. | we compared helminth communities in spiny mice (acomys dimidiatus) from 4 wadis in the arid montane region of the southern sinai in egypt, in a 4-week period in late summer. total helminth species richness was 14 (8 nematodes, 5 cestodes and 1 acanthocephalan) with 94% of mice carrying at least 1 species and an overall mean species richness of 1.85. the most prevalent parasites were protospirura muricola (47.8 %) and dentostomella kuntzi (46.3%). one larval cestode, joyeuxiella rossicum, represe ... | 2004 | 15471013 |
| endogenous development, pathogenicity and host specificity of eimeria cahirinensis couch, blaustein, duszynski, shenbrot and nevo, 1997 (apicomplexa: eimeriidae) from acomys dimidiatus (cretzschmar 1826) (rodentia: muridae) from the near east. | eimeria cahirinensis couch et al. 1997 was found in faecal samples of acomys dimidiatus from three different localities in the near east. twenty-two of 104 (21%) a. dimidiatus trapped on both the south- and north-facing slopes of "evolution canyon", lower nahal oren, mt. carmel, israel in august 2001 and 2002 were infected with e. cahirinensis. oocysts were also obtained from a single individual of a. dimidiatus trapped in wadi ramm, jordan in the summer of 1999. laboratory-reared spiny mice (ac ... | 2007 | 17048006 |
| chromosome homology between mouse and three muridae species, millardia meltada, acomys dimidiatus and micromys minutus, and conserved chromosome segments in murid karyotypes. | comparative chromosome painting with mouse (mus musculus, mmu) chromosome-specific dna probes was performed for three muridae species, the indian soft-furred field rat (millardia meltada), the spiny mouse (acomys dimidiatus) and the harvest mouse (micromys minutus). all probes except for the y probe were successfully hybridized to the chromosomes of all species, and homologous chromosome segments between mouse and the three species were identified at the molecular level. comparison of our data w ... | 2007 | 18095177 |
| a redescription of protospirura muricola gedoelst, 1916 (nematoda: spiruridae), a parasite of murid rodents. | the spirurid nematode protospirura muricola gedoelst, 1916 is redescribed from acomys dimidiatus (desmarest) from the st katherine protectorate, sinai, egypt. egyptian material closely resembled specimens of p. muricola from african mammals re-examined in this study, as well as conforming to published reports of this species. p. muricola with two denticles on each lateral lobe of the pseudolabia and six pairs of postanal papillae is closest to p. pseudomuris yokohata & abe, 1989, but can be read ... | 2009 | 19048405 |
| acomys, the closest relatives to gerbils, do express pdx-1 protein and have similar islet morphology to gerbils. | acomys, also called spiny mice, were once used as a diabetes model. we have recently demonstrated that the closest relatives to the acomys, members of the family gerbillinae, lack the transcription factor pdx-1. therefore, we sought to determine if members of this family also lack pdx-1, and describe the pancreatic morphology in three different species of acomys: acomys cahirinus (egyptian spiny mouse), acomys cilicicus (asia minor spiny mouse) and acomys dimidiatus (eastern spiny mouse). we suc ... | 2009 | 21099272 |
| Betaherpesvirus sequences in eastern spiny mice and Wagner's dipodils. | Eastern spiny mice (Acomys dimidiatus; also known as Sinai spiny mice) have been extensively studied in terms of the influence of parasite load on population size and reproductive fitness. The physical isolation of these rodent populations makes them interesting models for disease interactions in a real-life population as opposed to a laboratory. We identify betaherpesvirus sequences in eastern spiny mice and Wagner's dipodils (Dipodillus dasyurus), species that inhabit dry montane wadis (dry cr ... | 2011 | 22102666 |
| babesia behnkei sp. nov., a novel babesia species infecting isolated populations of wagner's gerbil, dipodillus dasyurus, from the sinai mountains, egypt. | although a number of new species of babesia/theileria have been described recently, there are still relatively few reports of species from africa. in this study based on the evaluation of morphology and phylogenetic relationships, we describe a novel species from wagner's gerbil, babesia behnkei n. sp. | 2014 | 25487227 |
| intraspecific and interspecific genetic variation of gongylonema pulchrum and two rodent gongylonema spp. (g. aegypti and g. neoplasticum), with the proposal of g. nepalensis n. sp. for the isolate in water buffaloes from nepal. | the gullet worm (gongylonema pulchrum) has been recorded from a variety of mammals worldwide. in an earlier study, we demonstrated two separate transmission cycles in cattle (bos taurus) and wild mammals in japan based on nucleotide sequences of the ribosomal rna gene (rdna) and cytochrome c oxidase subunit i (cox-1) region of mitochondrial dna of multiple isolates of different origins. our earlier study additionally demonstrated two major cox-1 haplotypes of g. pulchrum prevalent in cattle in j ... | 2016 | 26531300 |
| the comparative gastrointestinal morphology of five species of muroid rodents found in saudi arabia. | meriones rex (king jird), meriones libycus (libyan jird), acomys dimidiatus (eastern spiny mouse), acomys cahirinus (egyptian spiny mouse), and dipodillus dasyurus (wagner's dipodil) are five species of small rodents of the superfamily muroidea with distributions in eastern africa, egypt, and the desert regions of the arabian peninsula. water is scarce in these regions and may result in relatively low-digestible food. the aim of the present study is to describe and compare the gastrointestinal t ... | 2014 | 24664865 |
| the chromosome complement of acomys spp. (rodentia, muridae) from oursi, burkina faso--the ancestral karyotype of the cahirinus-dimidiatus group? | we present here data on chromosome banding analysis (r- and c-bands) of acomys sp. (rodentia, muridae) from oursi, burkina faso, characterized by 2n = fn = 68 and comparison of its banding patterns with those of acomys dimidiatus from saudi arabia (2n = 38, fn = 70), studied previously. the study revealed complete homology between acrocentric chromosomes of acomys sp. and chromosome arms of 16 pairs of metacentric and two pairs of acrocentric chromosomes of a. dimidiatus. in addition to monobrac ... | 1996 | 8939364 |
| long-term spatiotemporal stability and dynamic changes in the haemoparasite community of spiny mice (acomys dimidiatus) in four montane wadis in the st. katherine protectorate, sinai, egypt. | long-term field studies of parasite communities are rare but provide a powerful insight into the ecological processes shaping host-parasite interactions. the aim of our study was to monitor long-term trends in the haemoparasite communities of spiny mice (acomys dimidiatus) and to identify the principal factors responsible for changes over a 12 year period. | 2016 | 27059180 |
| the distribution of mucous secreting cells in the gastrointestinal tracts of three small rodents from saudi arabia: acomys dimidiatus, meriones rex and meriones libycus. | the proportion of mucin phenotypes (which form the protective biofilm of the gastrointestinal tract) differs between intestinal regions. this study examines the distribution of mucin secreting cells in the gastrointestinal tracts of the eastern spiny mouse (acomys dimidiatus), king jird (meriones rex) and libyan jird (meriones libycus), which inhabit the dry and hot deserts of saudi arabia. intestinal tract samples were processed to wax and tissue sections stained with alcian blue-periodic acid ... | 2016 | 26743350 |
| gastrointestinal nematode community of spiny mice (acomys dimidiatus) from st. katherine, south sinai, egypt. | the objective of this work was to study gastrointestinal nematode community infecting acomys dimidiatus in different wadis of st. katherine, south sinai, egypt. fieldwork was conducted in three wadis over a 4 weeks period during april-may, 2003 in st. katherine, south sinai, egypt. faecal samples from 47 spiny mice were analysed for gastrointestinal nematode community. the nematodes community consisted of four genera dentostomella spp., syphacia spp., aspicularis spp. and spirurids species. the ... | 2015 | 26688638 |
| two waves of anisotropic growth generate enlarged follicles in the spiny mouse. | mammals exhibit a remarkable variety of phenotypes and comparative studies using novel model species are needed to uncover the evolutionary developmental mechanisms generating this diversity. here, we undertake a developmental biology and numerical modeling approach to investigate the development of skin appendages in the spiny mouse, acomys dimidiatus. | 2014 | 25705371 |
| occurrence of ectoparasitic arthropods associated with rodents in hail region northern saudi arabia. | ectoparasitic arthropods are a diverse element of the saudi fauna. due to this, a survey of ectoparasites associated with rodents was conducted as a preliminary study in five districts of hail region of northern saudi arabia for the first time. ectoparasites extracted from 750 rodents were sampled and identified by recording their frequency of appearance. results revealed that 1,287 ectoparasites infested 316 of the captured rodent hosts. these ectoparasites parasitized on four species of rodent ... | 2014 | 24838257 |
| behavioural changes in the flour beetle tribolium confusum infected with the spirurid nematode protospirura muricola. | we examined changes to the behaviour of flour beetles, tribolium confusum, infected with the rodent stomach worm, the spirurid protospirura muricola, in the context of the 'behavioural manipulation hypothesis'. trobolium confusum infected with the third-stage infective larvae of p. muricola showed consistently altered patterns of behaviour. relative to uninfected beetles, over a measured time period, beetles infected with p. muricola were likely to move over a shorter distance, when moving their ... | 2015 | 24018146 |
| effect of congeneric chemical signals of different ages on foraging response and food choice in the field by golden spiny mice (acomys russatus). | the common spiny mice acomys dimidiatus and golden spiny mice acomys russatus coexist in the extreme warm and dry parts of the rift valley in israel. however, they are temporally segregated in that the former is nocturnal, whereas the latter is diurnal. daily rhythms of physiological and behavioral variables in a. russatus responded to semiochemical signals released by a. dimidiatus (in the urine and feces). both species feed upon the same food items but at different times of the 24-hr cycle. th ... | 2001 | 11710604 |
| cytological studies of certain desert mammals of saudi arabia. 6. first report on chromosome number and karyotype of acomys dimidiatus. | the diploid chromosome number is 2n = 38. the fundamental number is 70. the autosomes consist of 11 pairs of metacentric, 5 pairs of submetacentric and 2 pairs of acrocentric chromosomes. the sex chromosomes are both acrocentric, the x-chromosome is the largest. | 1988 | 3229635 |
| description of candidatus bartonella fadhilae n. sp. and candidatus bartonella sanaae n. sp. (bartonellaceae) from dipodillus dasyurus and sekeetamys calurus (gerbillinae) from the sinai massif (egypt). | bartonella spp. are parasites of mammalian erythrocytes and endothelial cells, transmitted by blood-feeding arthropod ectoparasites. different species of rodents may constitute the main hosts of bartonella, including several zoonotic species of bartonella. the aim of this study was to identify and compare bartonella species and genotypes isolated from rodent hosts from the south sinai, egypt. prevalence of bartonella infection was assessed in rodents (837 acomys dimidiatus, 73 acomys russatus, 1 ... | 2017 | 28541836 |
| a survey on endoparasites in wild rodents of the jaz murian depression and adjacent areas, southeast of iran. | in this survey, rodents and their endoparasites were investigated in the jaz murian depression and adjacent areas, southeast iran. in total, 146 specimens of rodents belong to 13 species were trapped. in general, 10 different genera of endoparasites including 11 species were collected. the endoparasites were identified as follows: (1) nematodes: trichuris muris, syphacia obvelata, labiostomum sp., labiostomum naimi, mastrophorus muris, aspicularis tetraptera and heligmosomoides skrjabini, physal ... | 2018 | 30538358 |
| predictive modelling in paleoenvironmental reconstruction: the micromammals of manot cave, israel. | this paper describes the micromammalian remains and paleoenvironment of the upper paleolithic sequence of manot cave (46-34 ka), southern levant. micromammal remains were identified from ahmarian (46-42 ka), levantine aurignacian (38-34 ka) and post-levantine aurignacian (34-33 ka) layers. to identify taphonomic agents, molar digestion was modelled for seven local raptor species, and model predictions were compared with observed digestion scores in the manot cave material. raptor species differe ... | 2019 | 31623862 |
| long-term spatiotemporal stability and dynamic changes in helminth infracommunities of spiny mice (acomys dimidiatus) in st. katherine's protectorate, sinai, egypt. | the importance of parasites as a selective force in host evolution is a topic of current interest. however, short-term ecological studies of host-parasite systems, on which such studies are usually based, provide only snap-shots of what may be dynamic systems. we report here on four surveys, carried out over a period of 12 years, of helminths of spiny mice (acomys dimidiatus), the numerically dominant rodents inhabiting dry montane wadis in the sinai peninsula. with host age (age-dependent effec ... | 2019 | 29921333 |