rats and bilharziasis in guadeloupe.the rats in guadeloupe (rattus rattus and rattus norvegicus) may play a part in schistosomiasis in three ways: - by harbouring fertile s. mansoni, a fact which serves to increase the total population of the parasite and may eventually take part in the infestation of man; - by harbouring a great number of ribeiroia marini, a trematode whose larval stages sterilize biomphalaria glabrata, the vector of schistosomiasis; - simply by eating b. glabrata. the quantitative influence of these contradicto ...19757114
data on the life cycle of ribeiroia marini guadeloupensis n. ssp., a trematode sterilizing biomphalaria glabrata in on the life cycle of ribeiroia marini guadeloupensis n.ssp., trematode sterilizing biomphalaria glabrata in guadeloupe. maintenance of the life cycle with a view to an eventual control of the populations of molluscs. in guadeloupe (french west indies), the definitive hosts of ribeiroia marini guadeloupensis n.ssp. are the two species of rats: rattus rattus and r. norvegicus. the first intermediate host is biomphalaria glabrata, the vector of intestinal schistosomiasis. the second intermedia ...197824996
insecticide susceptibility of some vector fleas and mosquitoes in burma.rat fleas and mosquitoes are insect vectors of public health importance in burma. plague is endemic in central burma and ddt has been the principal insecticide used for its control to date. dengue haemorrhagic fever, recently introduced and transmitted by aedes aegypti, has been spreading to major towns since 1971. the rodents, rattus rattus, r. exulans, bandicota bengalensis, mus musculus, as well as shrews were commonly caught during routine trapping in the country. rattus norvegicus, prevalen ...1975131975
a comparative quantitative study of myofibrillar-atpase (m-atpase) & succinic dehydrogenase (sdh) activities in certain specialized muscles of rat (rattus rattus) from various representative regions. 1979157976
effect of hyperthermia on myofibrillar atpase (m-atpase) activity & body weight in adult albino rat (rattus rattus). 1979158566
a histochemical study of the neuro-muscular spindles in the tongue of some investigation was undertaken to study the neuro-muscular spindles in the tongue (rattus rattus rufescens and suncus murinus) by cholinesterase technique, under maintained ph of 5.2, incubation period 20 h., and temperature 38 degrees c (rattus) and 39 degrees c (suncus). neuro-muscular spindles were observed frequently distributed from anterior to posterior of the tongue and took a little darker stain than the ordinary muscle fibres (negatively stained) while the nerve fibres and ganglia took ...1979160147
rodent control programmes in areas affected by bolivian haemorrhagic fever.bolivian haemorrhagic fever (bhf) caused by machupo virus is acquired by contact with the excretions and secretions of calomys callosus, an indigenous cricetine rodent which is preadapted to peridomestic habitats. it competes successfully with mus musculus, but not with rattus rattus. a successful disease control programme has functioned in beni department since 1964. it is based on trapping surveys and the detection of splenomegaly in calomys rodents as an index of chronic virus infection. mass ...1975182405
reaction of rattus rattus wroughtoni to kyasanur forest disease virus. 1978207642
transformation of cultured rat liver cells by murine sarcoma viruses.cultured liver cells (trl-2 cells), originating from a bd-6 rat, an inbred black rat strain, and possessing several marker enzymes, and characteristic ultrastructures of hepatic cells, were infected with murine sarcoma viruses (msv: kirsten and gazdar strains). on day 5-6 after virus inoculation, the monolayered epithelial cells focally began to pile up forming small polypoid projections, and on day 7 round-shaped cells were released from the polypoid foci. these cells first grew in a chain or a ...1975169808
parasites of some rodents in malaysia.a total of 2,337 rodents trapped from various parts of peninsular malaysia were dissected and studied for the distribution and prevalence of parasitic infections. four new rodent hosts for sarcocystis in malaysia are reported (bandicota indica, rattus sabanus rattus argentiventer and rattus norvegicus). sarcocystis was found in 17.2 percent of the rodents examined. rattus annandalei, rattus tiomanicus and rattus norvegicus are new hosts of syphacia muris in peninsular malsysia. rattus sabanus wa ...1979113889
[permissivity of the rat (rattus rattus) of guadeloupe with regard to schistosoma mansoni and evidence for migration of adult schistosomes to the lungs].in contrast to the laboratory rat, the rat (rattus rattus) of guadeloupe is a favorable host for the life cycle of s. mansoni: the parasite population is maintained at a high level (between 8 and 16% in this host until the 16th week and reproduces normally). the evolution of the parasitose is marked, shortly after the 8th week, by a transfer of schistosomes from the liver to the lungs.197896960
some aspects of haematology of a common indian field rat, rattus rattus arborious (linn.) in relation to sex and the present investigation the studies on erythrocyte and leucocyte counts, haemoglobin concentration, haematocrit values, blood biochemistry of protein, glucose and cholesterol, erythrocyte sedimentation rate, ph value, diameter of erythrocyte and clotting time were made in different sex and size (weight group) of an indian field rat, rattus rattus arborious. the number of erythrocyte, haemoglobin concentration, haematocrit values were found to be higher in females than the males, while the n ...197885591
study on the nerve endings in the pancreas of rattus rattus refescens and gallus domsticus as revealed by the cholinesterase investigation was undertaken to study the nerve endings in the pancreas of rattus rattus rufescens and gallus domesticus by cholinesterase technique. bulb-like nerve ending in the connective tissue (negatively stained) and dot-like nerve ending in the lobular cells were recorded in rattus. dot-like nerve ending on the periphery of the lobular cells and bulb like nerve endings connected with nerve bundle, were recorded in gallus. nerve endings were ache-positive in nature in both rattus and ga ...197780895
neurohistological observations on the kidney of rattus rattus rufescens (indian black rat) as revealed by cholinesterase technique.the intrinsic innervation of the kidney in rattus rattus rufescens (indian black rat) has been studied by cholinesterase technique, under various temperatures, incubation periods and different ph values. the percentage of myelinated nerves was rather high in the medulla region, whereas the non-myelinated nerves dominated in association with the uriniferous tubules and their branches, glomerulus and renal vein in the cortex region. periarterial ache-positive ganglia were recorded in the medulla r ...197880095
histamine synthesis and degradation in the chick (gallus gallus) and the rat (rattus rattus). 197943794
scrub typhus infection in rats in four habitats in peninsular malaysia.rickettsia tsutsugamushi isolations were attempted from blood samples obtained from rats captured in four adjacent habitats near kuala lumpur, malaysia. antibody surveys were also made. rickettsial infections were most frequent in rats captured in the forest and in lalang grass (imperata cylindrica) and least frequent in the most extensively disturbed habitat, an orang asli (aborigine) village. forest rats such as rattus sabanus (31%), as well as rats in the subgenus r. (rattus), i.e. r. tiomani ...1977415390
ultrastructure of sarcocystis sp. from the malaysian house rat, rattus rattus diardii.the ultrastructure of sarcocystis sp. from the malaysian house rat, rattus rattus diardii, was studied with the electron microscope. the thin, uniformly-dense primary cyst wall had a row of vesicular invaginations which were also seen along the wall of the villi-like projections or cytophaneres. within the villi were spherical bodies and hollow, curled structures. the ground substance beneath the primary cyst wall extended into the cyst as thin septa or trabeculae separating the tightly-packed z ...1977410181
findings of yersinia in rats and sewer rats.survey of first methodical experiences in the microbiological examination of sewer rats rattus norvegicus and rats rattus rattus for yersiniae. from total of 178 cadavers 30 yersinia cultures were isolated, including 4 yersinia pseudotuberculosis serotype iii strains. yersinia enterocolitica serotype o3 was isolated only from rats rattus rattus in pig houses. importance of suitable treatment of cadavers (at best in frozen state) and their quick delivery to the laboratory is being discussed.1977337734
electron microscopic studies of intracisternal virus particles in soehner-dmochowski murine sarcoma virus-induced bone tumors of new zealand black rats.soehner-dmochowski murine sarcoma virus (moloney)-induced bone tumors of new zealand black rats carry two morphologically different types of virus particles, namely, extracellular type c and intracisternal virus particles, which have thus far not been reported. these two types of virus particles have also been observed in the tissue culture cells derived from normal prostate tissues of a/dm and balb/c/dm mice after inoculation of cell-free extracts of these bone tumors. the intracisternal virus ...1978205348
[effects of aflatoxins b1 on glucose-6-phosphatase activity in kidney and liver of rats (rattus rattus norvegicus)].the authors observed the influence of the b1 aflatoxin over rat liver and kidneys glucose-6-phosphatase activity. animals aged 30 and 60 days received b1 aflatoxin in oil, 1 mcg/g and 5 mcg/g of body weight. the parameters were observed 6, 24 and 48 hours after the micotoxin administration. there was significant decrease of glucemia in the 30 days animals. in the 60 days animals the results suggested possible increase in the liver glucose-6-phosphatase and marked decrease in glycogen.1976198857
virus-induced animal model of osteosarcoma in the rat: morphologic and biochemical studies.osteosarcomas were produced by the intratibial inoculation of new zealand black rats with moloney sarcoma virus (msv) at 1 day and 4 days of age. radiographic evidence of osteosarcoma development was first demonstrated at 10 to 15 days postinoculation in both groups. subsequent radiographic and light and electron microscopic evaluation of tumor-bearing rats demonstrated that osteosarcomas in rats inoculated at day 4 of age were more osteoproliferative osteosarcomas than those in rats inoculated ...1977189616
carcinogenicity of camellia sinensis (tea) and some tannin-containing folk medicinal herbs administered subcutaneously in an attempt to correlate the high incidence of esophageal carcinoma in natives of certain places with their habit of using herbaceous folk medicines, we performed bioassays of several plant extracts and the fractions prepared from them. fourteen extracts and fractions from 6 plants were injected sc into nih black rats. the tannin fractions from quercus falcata pagodaefolia, diospyros virginiana, and camellia sinensis were very active and produced tumors at the injection site in 66% or more of ...1976187761
metal-free housing units for trace element studies in rats.metal-free housing units fabricated from clear plastic and polystyrene egg crate panels were used to house rats for studies involving trace elements. the cages did not require bedding, were well ventilated and fitted into commercially available cage racks. modifications of the basic design were made to provide both maternity and metabolism cages.1979502461
capillaria hepatica infection of wild rodents in peninsular malaysia.capillaria hepatica infection in wild rodents collected from the states of kelantan, selangor and johore in peninsular malaysia since 1973 is reported. a total of 1,258 rodents consisting of 20 species of house, field and forest rats, and 7 species of squirrels were examined for the parasite and 17 species consisting of 111 murids and 1 flying squirrel were found infected. the house rat, rattus norvegicus had the highest prevalence rate, followed by 3 species of field rats, r. tiomanicus, r. arg ...1977607425
a curious polycephalus tapeworm larva from rattus rattus diardi in an oil palm plantation. 1977607437
evolutionary aspects of variant types of rat mitochondrial dna's.mitochondrial dna's (mtdnas) were prepared from various kinds of individual norway rats, rattus norvegicus, and from three types of individual black rats, rattus rattus, (asian type, ceylon type, and oceanian type). intra- and interspecies divergence of their mtdna sequences were calculated based on changes in restriction endonuclease cleavage sites. the extent of intraspecies divergence of black rats (about 8%) is much larger than that of norway rats (1%) and the mtdna of asian-type black rats ...1979486479
parasite fauna of the house rat rattus rattus diardii in kuala lumpur and nearby hundred and fifty one house rats, rattus rattus diardii from five different localities, jinjang, dato keramat, kuala lumpur, sungai besi and selayang baru, were examined for parasites. nineteen species of parasites were recovered. hymenolepis diminuta and nippostrongylus brasiliensis are the predominant species. the dominancy of the parasite species in the rats differed in each locality: hymenolepis diminuta in dato keramat and kuala lumpur; nippostrongylus brasiliensis in sungai besi; gongy ...1979483007
population dynamics of the nematode parasites of the house rat, rattus rattus. 1979461852
the occurence of coxiellosis among rodents and shrews in the tarai area of uttar praedesh.rodents and shrews were screened for serologic evidence of coxiella burnetii. attempts were made to isolate the organism from the spleen and liver. seroreactors: total positive/total tested (% positive), in rats (rattus rattus, r. norvegicus), ground shrews (suncus murinus), bandicoots (bandicota indica, b. bengalensis) and the house mouse (mus musculus), respectively, were 13/105 (12.38), 6/42 (14.3), 2/15 (13.3) and 1/7 (14.3). of the eight rickettsial isolants recovered including four from fi ...1979459035
antispermatogenic activity of cyclohexanol in gerbil (meriones hurrianae jerdon) & house rat (rattus rattus rufescens). 1979540979
finding of yersinia enterocolitica in rattus rattus. 1977560407
species-related difference in calcium accumulation by cardiac mitochondria.1. mitochondria isolated from the ventricles of cavia porcellus, mesocricetus auratus, rattus rattus and mus musculus accumulate calcium in an energy-linked process. 2. measurements of the initial velocity of accumulation by dual-wavelength spectrophotometry show species-dependent variation, with cavia demonstrating the fastest rate and rattus the slowest rate of accumulation. 3. total amount of calcium accumulated per unit protein varied in a manner similar to rate of accumulation, with cavia a ...1978318360
comparative studies on the nonprotein but nondialysable sugar-peptide fraction isolated from the plasma of various classes of vertebrates.1. the nonprotein but nondialysable ninhydrin-positive substances isolated from plasma of some species belonging to four classes of vertebrates (fishes, amphibians, birds and mammals) were studied. 2. in all species studied (cyprinus carpio, salmo gairdneri, rana esculenta, rana temporaria, gallus domestica and rattus rattus) a similar group of nondialysable ninhydrin-positive substances may be isolated from the plasma by sephadex g-25 filtration followed by dialysis. 3. thin-layer sephadex g-25 ...1977318251
anserine and carnosine in chicks (gallus gallus) rat pups (rattus rattus) and ducklings (anas platyrhynchos): comparative ontogenetic observations.1. muscle and brain from developing chick embryos, as well as from day-old chicks, rats, and ducks were analyzed for the histidine-containing dipeptides, anserine and carnosine. 2. anserine was found in the brain of all species studied, whereas in muscle, anserine was found only in chicks. 3. at 15 days, the muscle of developing chick embryo contained 41 +/- 9 mumoles/100 g anserine while carnosine was present at a level of less than 3 mumoles/100 g. 4. in day-old chicks the anserine level in mu ...1977318250
occurrence of yersinia enterocolitica in house rats.from july 1976 to may 1977, 270 rats (259 rattus norvegicus and r. rattus) in sapporo were examined for the presence of yersinia enterocolitica in house rats. the organism was isolated in 55 rats (54 r. norvegicus and 1 r. rattus). isolated strains were determined as o group (o)3, biovar 4; o4, biovar 1; o5a, biovar 1; and o6, biovar 1. the isolation of o3, biovar 4 strains from r. norvegicus is the first in the world, as far as we know. the organism was isolated from the duodenum in 3 rats, the ...1978697364
an epidemic of rift valley fever in egypt. 2. isolation of the virus from animals.during the epidemic of rift valley fever (rvf) that occurred in egypt and other areas of north africa in 1977, the virus was isolated from various species of domestic animal and rats (rattus rattus frugivorus) as well as man. the highest number of rvf virus isolates were obtained from sheep; only one isolate was recovered from each of the other species tested, viz. cow, camel, goat, horse, and rat. rvf virus was reisolated from both camel and horse sera, apparently for the first time.1979314355
intratibial moloney sarcoma virus-induced osteosarcoma in the rat: tumor incidence and pathologic evaluation.osteosarcomas were induced in approximately 80% of young new zealand black rats by the intratibial inoculation of moloney murine sarcoma virus from day 1 to day 5 after birth. the neoplasms were composed of a spectrum of well-differentiated to poorly differentiated osteoblasts, osteocytes, and osteoclasts. budding of c-type viral particles was associated with tumor induction. compared to rats inoculated on day 1 after birth, rats inoculated at 4 days of age developed consistently more osteoproli ...1977264594
effects of whole body co60 irradiation on the male genital tract of gerbil (meriones hurrianae), hedgehod (hemiechinus auratus collaris), and house rat (rattus rattus rufescens).1. the effects of 400 and 575 rads of whole body irradiation in gerbil (meriones hurrianae), hedgehog (hemiechinus auratus collaris) and house rat have been studied with a view to compare the effects of irradiation on the desert mammalian species with those of domestic ones. 2. typical signs and symptoms of radiation sickness, transient body loss and radiation mortality in gerbils and house-rats were apparent, whereas the hedgehogs were not affected at this dose level. 3. extensive necrosis, exf ...1977562579
nematode parasites of rats in west java, indonesia.from the indonesian rats, namely rattus rattus diardii, r. exulans, r. tiomanicus, r. niviventer, r. lepturus, r. bartelsii, r. cremoriventer, r. sabanus and pithecheir melanurus, surveyed for nematode parasites, the following parasites were recovered: angiostrongylus cantonensis, capillaria hepatica, cyclodontostomum purvisi, hepatojarakus malayae, rictularia tani, mastophorus muris, physaloptera sp. and subulura andersoni. of these, c. purvisi, h. malayae, physaloptera, sp. and s. andersoni ha ...1978571622
angiostrongyliasis in indonesia: additional geographic and host occurrence records.geographical and host occurrence records for angiostrongylus cantonensis throughout the indonesian archipelago a;e reported. a. cantonensis was found in the following provinces: west sumatra, south sumatra, lampung, west java, central java, north sulawesi and east nusa tenggara. infections were diagnosed in the following rodents: rattus rattus diardii, rattus exulans, rattus tiomanicus jaloriensis, rattus lepturus, rattus norvegicus and bandicota indica setifera and in the giant african land sna ...1978751218
the fabrication of plastic cages for suspension in mass air flow racks.a cage for suspension in mass air flow racks was constructed of plastic and used to house rats. little or no difficulty was encountered with the mass air flow rack-suspended cage system during the 4 years it was used for the study of trace elements.1979513622
epidemiological pattern of chagas' disease in an endemic area of costa rica.triatoma dimidiata was found in association with 34.6% of the houses in a representative town within the dispersion area of the insect. the mean density over the entire study period was 21.5 insects per house, but it tended to be lower in the majority of the houses. insects usually were associated with dirt floors, poor sanitary condition of dwellings, and piles of firewood. the infection rate of 3,276 insects for trypanosoma cruzi was 30.9%. the infection was demonstrated in several synanthropi ...1975804266
studies on schistosoma bovis in ethiopia.schistosoma bovis occurs in at least seven of the 14 rovinces of ethiopia. results of faecal and snail surveys in three foci are reported. adwa. one collection showed that nine out of 26 bulinids were infected with s. bovis. the snail host was a tetraploid form of bulinus (n = 36). the examination of 200 specimens of cattle faces revealed no s. bovis eggs, which was attributed to poor technique or light infection. gewani. the snail host was bulinus abyssinicus, which was also infected with s. ha ...1975808181
serologic survey for toxoplasma gondii in wild animals in florida.blood samples were collected for serum separation from 114 species of wild animals (25 species of mammals, 82 species of birds, and 7 species of reptiles) in florida. each of the 3,471 samples was tested for antibodies to toxoplasma gondii, using the indirect hemagglutination test. the highest prevalences of t gondii antibodies were 19% in armadillos (dasypus novemcinctus), 18% in raccoons (procyon lotor), 13% in black rats (rattus rattus), and 11% in opossums (didelphis marsupialis). antibody p ...1979521384
[variations in the immune response in several schistosome-rat infections].the evolution of immunological reactions in two rat strains, namely rattus rattus from guadeloupe and rattus norvegicus var. albinos, was studied. both have beem experimentally infested by three different strains of schistosoma mansoni. we observed that rattus rattus infested by the american strains reacts poorly and shows a persistant infection contrary to the results obtained with other infestations. so it appears that a special pathogenic complex might be present in guadeloupe which could exp ...1976825253
[comparative studies on release of enzymes from platelets during blood clotting in rattus rattus flavitecus and rattus norvegicus (author's transl)].increase of lactate dehydrogenase (ec and creatine kinase (ec in serum and plasma level during blood clotting was compared in r. rattus flavitectus (black rat) and r. norvegicus (albino rat). both the enzyme level increased by the release from platelets in process of clotting in rat as previously described (emori t., takahashi m. and nagase s. (1978) exp. animals, 27, 167), but the change in black rat was very slight. owing to search for the reason to prove the difference in t ...1979527675
induction of renal cancers in rats by intrarenal injection of nickel subsulfide.the carcinogenicity of nickel subsulfide (alpha ni3s2) was studied following intrarenal (i.r.) injection in rats. within 100 weeks after i.r. injection of 5 mg of alpha ni3s2, renal cancers were found in 64 percent of wistar-lewis rats, 50 percent of nih black rats, 28 percent of fischer rats and 0 percent of long-evans rats. these findings demonstrate significant differences in susceptibilities of the four rat strains to alpha ni3s2-induction of renal cancers. no renal cancers were found in mal ...1979528855
mauritius type black rats with peculiar karyotypes derived from robertsonian fission of small metacentrics.all seventeen black rats collected from mauritius island were characterized by having many extra small acrocentric autosomes. their basic karyotype was of oceanian type, because of the presence of the large metacentric m1 and m2 pairs, but chromosome numbers in 13 specimens among them were 42, those of 3 specimens 43, and those of the remaining one specimen 44. although the oceanian type rat had 2 small acrocentric autosomes (pair no. 13), 16 mauritius rats had 10 small acrocentrics, and the rem ...1979533663
genetic aspects of polymorphic c-bands in the chromosomes of the black rat (rattus rattus tanezumi) in japan. 1979535425
antiplague antibodies against yersinia pestis fraction-i antigen in serum from rodents either experimentally infected or captured in harbor areas of japan, 1971--1977.antiplague indirect hemagglutination tests were investigated with yersinia pestis fraction-i antigen and sera from experimentally infected rodents. the same tests with sera treated with acetone or acetone-2-mercaptoethanol were performed in parallel. technical conditions were determined to insure the specificity and reproducibility of the reactions. utilizing the methods studied, we carried out serological surveillance of plague with sera from wild rats (rattus rattus and r. norvegicus) captured ...1979537520
neurohistological and histochemical observations on the lung of rattus rattus rufescens (indian black rat).the intrinsic innervation of the lungs (right and left) has been studied by the cholinesterase technique, considering the effect of various ph, incubation periods and temperatures. cholinergic innervation dominated. the peribronchial ganglia, large, medium-sized and irregular-shaped, rounded and small, showed a positive cholinesterase reaction. maximum che activity was noticed in the bronchi and their branches and on the periphery of the alveoli.19751962
effects of malva viscus conzattii greenm flower extract on testicular function of the house rat rattus rattus rufescens & the gerbil meriones hurrianae jerdon: a biochemical study.extract of the flower malva viscus conzattii (m. conzattii) was administered at a dose of 25/50 mg/day/animal to 30 healthy adult male gerbils and 30 adult male house rats to determine its effect on fertility. after 25 days' treatment fin l body weight, and the weights of testes, epididymides, seminal vesicles, and adrenal glands were measured. testis, epididymides, and seminal vesicles were prepared for histological examination and total protein, rna, sialic acid, and alkaline phosphatase act ...1977598890
[helminths of birds and mammals from israel. vi. the taxonomy and ecology of trichostrongylid nematodes (author's transl)].thirteen species of trichostronglyloid nematodes have so far been recorded from wild birds and mammals in israel and surrounding territories. three species were found in birds: amidostomum fulicae (rudolphi, 1819) in fulica atra l., 1758, a. acutum (lundahl, 1848) in anas crecca l., 1758 and amidostomum sp. in ceryle rudis l., 1758. ten species, 3 of which are new, were found in small mammals: trichostrongylus colubriformis (giles, 1892) in hystrix indica kerr, 1792; tenorastrongylus josephi n. ...1975776059
[the role of the rat in the dynamics of endemic schistosomias in guadeloupe].in guadeloupe (french lesser antilles), because they are simultaneously infested with schistosoma mansoni, which causes the human intestinal schistosomiasis, and ribeiroia marini, a trematode which sterilizes the mollusk-host of the schistosoma, the rats (rattus rattus and rattus norvegicus) seem able to influence, at least locally, the infestation of the human population.1975813876
[aspects of rats schistosomiasis in the non-salted mangrove swamps and the backmangrove area in the island of grande-terre (guadeloupe) (author's transl)].the study of parasitism by schistosoma mansoni among rats (rattus rattus and rattus norvegicus) has been carried on in guadeloupe. over half the rats caught in the non-salted mangrove swamps and the back-mangrove area of the island of grande-terre are parasitized. it seems possible diagrammatize the characteristics of these sites, where the cycle of rats schistosomiasis develops.1977613965
studies on the host-flea relationship. iii nutritional efficacy of blood meal of rat fleas xenopsylla cheopis (rothschild) and xenopsylla astia (rothschild).rat fleas, xenopsylla cheopis (rothschild) and x. astia (rothschild) were fed artificially on whole blood, milk and blood fractions in an attempt to identify the factor(s) which trigger ovarian maturation. blood from the white rat, house rat, white mouse, frog, chick and man fed artificially induced vitellogenesis in over 50% of fleas of all combinations except in x. cheopis fed on chick blood. gut distension alone had no influence on initiation of vitellogenesis as judged by feeding milk. washe ...1976999361
comparative dimensional characteristics of spermatozoa in muridae.a comparative study has been made of the dimensional characteristics in six species of muridae (malardia meltada, bandicota bengalensis, albino rat, rattus norvegicus, mus booduga, rattus rattus). characteristic differences were found in the dimensions of their spermatozoa. head dimensions viz., acrosome length, width, area and post-acrosomal area, vary significantly between different species but the differences are significant within individuals of the same species. flagellum dimensions viz., m ...1977615418
the bandicoot rat, a new host record for angiostrongylus cantonensis in indonesia.a survey for angiostrongylus cantonensis in possible definitive and intermediate hosts was conducted in ancol, jakarta. adult worms were found in 43% of bandicoot rats, bandicota indica setifera, in 14% of rattus rattus diardii and 36% of the achatina fulica were infected with larval forms of the parasite. the finding of the parasite in the bandicoot rat constitutes a new host record for indonesia.19761027106
angiostrongylus malaysiensis from tuaran, sabah, with reference to the distribution of the parasite in malaysia.a survey of angiostrongylus malaysiensis among wild rodent and molluscan hosts was made in the tuaran central agricultural research station and within the vicinity of tuaran, sabah. three of 19 rattus rattus diardii, one of 2 r. exulans and one r. argentiventer were found naturally infected with the parasite. in this survey 56 of 382 molluscs comprising of pila scutata, achatina fulica and two species of land slugs, laevicaulis alte and microparmarion malayanus, were found naturally infected wit ...19761030843
[mixed sero-epidemiologic study of arbovirus-arenavirus in the small mammals of tunisia].blood samples of 156 small mammals caught in tunisia in 1976 and 1977 were examined for the presence of antibodies to some arboviruses and arena-viruses. haemagglutination-inhibiting antibodies against west nile virus were detected in 19.8 0/0 of examined sera, mainly from mus sp., rattus rattus, eliomys tunetae in the northern part of the country and from ctenodactylus gundi and pipistrellus kuhli in the south. in addition, antibodies against uukuniemi and bhanja were found in 3.2 0/0 and 4.5 0 ...1977615674
carcinogenicity of some folk medicinal herbs in rats.twelve medicinal herbs were bioassayed to correlate a high incidence of esophageal carcinoma in natives of different places with their habitual consumption of these products. outbred nih black rats were given 72 weekly sc injections of the total aqueous extracts of the plant materials. the tanninrich plant extracts from areca catechu and rhus copallina produced local tumors in 100 and 33%, respectively, of the experimental animals. other materials included diospyros virginiana and extracts from ...1978625070
chromosomal polymorphism caused by supernumerary chromosomes in rattus rattus ssp. frugivurus (rafinesque, 1814) (rodentia, muridae).a chromosomal numeric polymorphism 2n = 38, 39, 40 and 41 in the species rattus rattus ssp. frugivurus (rafinesque, 1814) is reported for the first time for this subspecies. the numbers 2n = 39, 40 and 41 are new for the species. the polymorphism is due to the presence of 1, 2 or 3 b-chromosomes, which are all small metacentrics of the size and shaped vary close to the other autosomes of the normal complement, and whose character of being supernumeraries is shown in meiosis.1978631258
neuro-histochemical study of the adrenal gland of rattus rattus rufescens (indian black rat) as revealed by cholinesterase technique.the present investigation was undertaken to study the innervation and acetylcholinesterase (ache) distribution in the adrenal gland of rattus rattus rufescens (indian black rat) by cholinesterase technique. the percentage of myelinated nerves in the cortical zone (cortex) and medulla zone was high. ache-positive and multipolar ganglia on the outer medulla region, and the ganglia and nerve cells, arranged in chain-like fashion in the chromaffin tissue, were recorded. ache activity was marked in t ...1978676653
capillaria hepatica in small mammals collected from shoa province, ethiopia.a total of 1,110 small mammals has been examined for capillaria hepatica in shoa province, ethiopa. nineteen of 308 (6.2%) rattus rattus and 1 of 212 (0.5%) praomys albipes were infected. the data indicate that c. hepatica was essentially limited to commensal rats (r. rattus).1978691131
effect of feeding on plasma uric acid levels in snakes.the effect of feeding on plasma-uric acid concentrations of the snake was studied. the values were monitored in 2 gopher snakes and 2 black rat snakes which were fed mice. plasma uric acid values in snakes increased after eating and gradually returned to base line with the digestion of the mice. uric acid concentrations were greater in snakes eating 2 mice than in those eating only 1 mouse. the base-line plasma uric acid concentration in snakes was approximately 2 to 5 mg/dl. plasma uric acid co ...1978697168
isolation of leishmania strains from rattus rattus in italy. 1978705851
the detection of hammondia hammondi in australia and the identification of a free-living intermediate host.a cat fed commercially prepared cat food and free-living rats (rattus rattus and r. norvegicus) passed coccidian oocysts which were morphologically similar to toxoplasma gondii. mice dosed with these oocysts did not develop toxoplasmosis, but instead developed small, thin-walled parasitic cysts containing small bradyzoites in their striated muscles. these cysts measured 35 to 90 micron by 9 to 40 micron and they resembled cysts of hammondia hammondi. unlike t. gondii this coccidian parasite was ...1978735301
[preliminary report on the demonstration of resistance to coumafene in rattus rattus in marseilles].an abnormal proliferation of rattus rattus in an important food-products warehouse in marseille's periportuary zone has been recorded in spite of preventative measures put in place and aimed at testing these rodents resistance to basic anticoagulants, especially to coumafene. the laboratory experiments on animals taken from the invaded area have enabled us to prove for the first time on metropolitan ground a rattus rattus resistance to coumafene. the colony of rodents responsible is giving proof ...1978743770
[supplementary report on the study of resistance to coumafene in rattus ratus observed at marseilles].a resistance to coumafene has previously been observed among rattus rattus in a foodstuffs warehouse in the port of marseille. new tests are here reported. they concern rats captured in two warehouses situated at a distance of 1,000 m. from one another, and separated by a distance approximately similar to that of the first warehouse explored. the experiments which were carried out, although limited in number, have clearly shown a resistance to coumafene administered in high doses in a rat of the ...1978743778
[ventricular topography of the diencephalic ependyma in rattus rattus (l.)--a scanning electron microscopy study]. 1978746796
[the epidemiology of chagas' disease in a rural area of the city of teresina, piauí, brazil].in the rural areas of teresina, 129 triatomines were captured distributed in (a) artificial ecotopes; a house with one triatoma brasiliensis, one panstrongylus geniculatus, rhodnius pictipes, and one rhodnius prolixus and in a uninhabited chicken house (7 rhodnius nasutus). (b) natural ecotopes; pahus orbignya martiana (41 rhodnius neglectus, 33 rhodnius prolixus and 41 rhodnius nasutus) and copernicia cerifera (3 rhodnius neglectus). the 22.6% of captured triatomines were infected by flagellate ...19921308066
[brucellosis, tularemia and borreliosis isolated from wild animals captured in ankara, konya, urfa and nevsehir provinces in turkey].621 citellus, 41 mus musculus, 35 microtus, 442 meriones, 70 rattus rattus, 56 turtle, 89 hare, 1 hamster, 1 hedgehog and 1 sea snake, altogether 1379 wild animals were captured in ankara, konya, urfa and nev┼čehir. neither brucella or francisella tularansis could be isolated nor borrelia could be seen. 1/40-1/80 agglutination titers obtained in 3 out of 134 sera taken from citellus, in 3 out of 264 sera taken from guinea pigs which were inoculated with spleen, liver and kidney suspensions of wil ...1976979704
quantitative and qualitative analysis of helminth fauna in rattus rattus rufescens.a helminthological survey of 149 house rats in jodhpur during the year 1975 revealed infection with 8 helminth species: 4 cestodes, vampirolepis fraterna, hymenolepis diminuta, mathevotaenia symmetrica and taenia taeniaeformis (larval stage); 3 nematodes, aspiculuris pakistanica, rictularia ratti and syphacia sp. and one acanthocephalan, moniliformis sp. vampirolepis fraterna, h. diminuta and a. pakistanica were most common, r.ratti and m. symmetrica less frequent, and t. taeniaeformis, syphacia ...1976987094
lectin staining studies on follicular atresia in house rat (rattus rattus).topographic distribution of terminal and intercalary carbohydrate moieties were studied using horseradish peroxidase conjugated glycine max (gma), arachis hypogea (pna), lotus tetragonolobus (lta), bandirarea simplicifolia (bsa), and dolichos biflorus (dba) agglutinins. n-gal nac, alpha-d-gal, alpha-l-fuc, d-gal (beta-1-3)-d-gal nac, and alpha-beta-d gal nac linked glyco-conjugates were exposed during follicular atresia in oocyte, zona pellucida and granulosa cells. theca interna and interstitia ...19921365769
x-monosomy in the indian black rat.the south indian black rat, rattus r. rufescens (gray) has a diploid number of 38 chromosomes. a random sample from hinakal (mysore, s.w. india) revealed the presence of rats with aneuploid chromosome numbers, viz. 2n = 37, 39, 40, and 42. the 37-chromosome individual was a female and possessed the xo constitution. the diploid numbers higher than 38 were due to the presence of supernumerary (b) chromosomes. the origin and consequences of the xo condition in rattus r. rufescens and other mammals ...1977874306
new inversion of the pair no. 3 chromosome in the black rat.a japanese black rat (rattus rattus tanezumi) with a subtelocentric pair no. 3 chromosome was found in gotenba, japan. by comparison of the length in both members of the chromosome pair, and from the g-band pattern, the subtelocentrics seemed to have developed from the original acrocentrics by the pericentric inversion.1977891800
[studies of yersinia pestis in wild animals captured in ankara, konya and nevsehir].no yersinia pestis could be isolated, by culturing and by inoculations to 1212 guinea-pigs and 150 mice; from 623 citellus, 41 mus musculus, 55 microtus, 442 meriones, 70 rattus rattus, 56 turtle, 89 hare, 1 hamster, 1 hedgehog, 1 sea snake, altogether 790 dead, 589 alive, i.e. 1379. wild animals captured in ankara, konya (karapinar), urfa (akçakale) and in nev┼čehir. in 141 sera taken from citellus captured alive, and in 174 sera taken from guinea-pigs inoculated with spleen, liver and kidney su ...1976933892
karyologic studies on hybrids between asian, ceylonese, and oceanian type black rats, with a note on an xo female occuring in the f2 generation.f1 hybrids between the asian type (2n=42) and ceylonese type black rats (2n=40) invariably showed 41 chromosomes, while those between the oceanian type (2n=38) and the ceylonese type usually showed 39 chromosomes. twelve f2 hybrids (three litters) were obtained only from the latter combination. among them, the karyotypes of nine rats were successfully analyzed. they were segregated into the oceanian type (three rats) and the f1 type (six rats). no ceylonese type was obtained. from the results of ...1977606505
observations on the intrinsic innervation of the islet of langerhans of rattus rattus rufescens (indian black rat).the innervation of langerhans' islets appeared rather profuse. generally the nerve fibres of the peri-insular plexus formed a basket enveloping the islet of langerhans. the peri-insular ganglia were occasionally seen. no autonomic interstitial cells of cajal nor nerve endings were observed in the islet of langerhans, due to the thickness of the sections. the 'complexes sympathico-neuro-insulaires' were occasionally seen. the plexuses and neural terminal network were seen connected to each other; ...19751099858
short term effects of animal venoms on the mitotic index of the duodenal mucosa of albino rats.short term administration of the venoms of the snakes naja haje, naja nigricollis, and cerastes vipera and of the scorpion leiurus quinquestriatus on the mitotic index of the duodenal mucosal cells of the white rat, rattus rattus, has been studied. all the venoms increased the number of dividing cells of the duodenal mucosa significantly. naja haje crude venom was fractionated into three fractions. fraction i had no effect on the mitotic index whereas fractions ii and iii increased it significan ...19921344905
isolation of leishmania from a black rat in the baghdad area, iraq.leishmania was recovered from a black rat in the baghdad area, iraq. leptomonads from samples of blood and tissues of this animal cultivated on nnn medium produced visceral leishmaniasis when injected into white mice. this is the first record of natural visceral leishmaniasis in a non-human host in iraq.1976962001
the female to male ratio (fmr) in dominant nematode populations in the house rat rattus rattus. 1977562400
supernumerary chromosomes in the black rat (rattus rattus) and their distribution in three geographic variants.supernumerary chromosomes have been examined in 352 black rats, covering three geographic variants, by use of conventional and c-band staining techniques. metacentric supernumerary chromosomes, one to three in number, were found in malayan black rats (rattus rattus diardii), with 2n=42, in indian black rats (r. rattus rufescens), with 2n=38, and in ceylonese black rats (r. rattus kandianus), with 2n=40. the supernumeraries had similar morphology and stained heavily along their entire length by c ...1977862437
long-term dynamics of natural populations of schistosoma mansoni among rattus rattus in patchy environment.dynamics of natural populations of schistosoma mansoni were studied during 8 consecutive years among rattus rattus populations from 8 transmission sites of the marshy forest focus of guadeloupe (french west indies). the schistosome population is over-dispersed (k = 0.119) within the murine hosts and ecological factors linked to the patchy environment may be responsible for such aggregated distribution. analysis of the spatio-temporal variations in prevalences, intensities and abundances showed l ...19921594292
[scanning electron microscopic investigations on the formation of reissner's fiber in rattus rattus [l.] (author's transl)]. 1977927633
histochemical study on the nerve endings in the lung of rattus rattus rufescens and francolinus pondicerianus.presence and the relation of the nerve endings with associated structures in the lund of rattus rattus rufescens (indian black rat) and francolinus pondicerianus (grey partridge or safed teeter) has been studied by cholinesterase technique. dot, plate, and vater pacini corpuscles like nerve endings in the lung of rattus and dot, and bulb like nerve endings with axis cylinder covered with myelinated sheath in the lung of francolinus were recorded. the nerve endings were ache-positive.1977611695
observations on the involvement of wildlife in an epornitic of chlamydiosis in domestic an investigation of potential wildlife reservoirs of chlamydia psittaci at the site of an acute, highly fatal epornitic of chlamydiosis in domestic turkeys in texas, various species of wild birds and rodents were captured and tested for chlamydial serum antibodies and chlamydiae in their tissues. thirteen (65%) of 20 blackbirds (agelaius sp), 4 (44%) of 9 killdeer (oxyechus vociferus), 3 (27%) of 11 sparrows (passer sp) and 1 of 4 mourning doves (zenaidura macroura) were seropositive, but chl ...1976988009
recent isolations of lassa virus from nigerian rodents.rodents were trapped in the benue-plateau and north-eastern states of nigeria where lassa fever had been reported in previous years. eight lassa virus strains were isolated from tissues and blood of rodents identified in the field as being of 3 different species: mastomys natalensis, rattus rattus, and mus minutoides. all the infected rodents were collected in village habitats. these isolations indicate the presence of lassa virus in wild rodents in nigeria during periods when no human infection ...19751085216
[ventricular topography of the diencephalic ependyma in rattus rattus (l.)--a scanning electron microscopy study]. 1977611146
a decade of plague epidemiology and control in the western usambara mountains, north-east tanzania.outbreaks of human plague have been occurring in the western usambara mountains since 1980, involving many cases and deaths. epidemiological surveys and control activities were carried out from june 1980 to may 1990. rodents were trapped live, identified and serologically tested for plague, using the passive haemagglutination and passive haemagglutination inhibition tests. rodent fleas were collected, processed, identified and counted. house fleas were caught with light traps and similarly treat ...19921356303
prevalence of listeria (spp.) in wild rats captured in the kanto area of the kanto area a total of 245 wild rats were captured. all rats captured in ikebukuro (110 rats) and 9 out of 41 rats in yokohama were rattus rattus, and all other 126 rats were rattus norvegicus. in kashima and ikebukuro, listeria was isolated from 28 rats (77.8%) and 27 rats (24.5%), respectively, but in the other 4 areas listeria was isolated from 0-7% rats. listeria monocytogenes was isolated from 12 rats (10.9%) captured in ikebukuro and 2 rats in kashima and numazu. the frequent isolati ...19921643170
isolation of listeria monocytogenes from roof rats (rattus rattus) in buildings in tokyo. 19911832043
karyotypic anomalies in indian house rat, rattus rattus rufescens gray. 19761001039
antibodies to lymphocytic choriomeningitis virus in wild rodent sera in egypt.specific antibodies to lymphocytic choriomeningitis (lcm) virus were detected in sera of wild rodents trapped in different regions of egypt. the highest proportion of positive sera (11.5%) was found in sinaa governorate of the asian continent, followed by sharkia governorate (5.6%) adjacent to sinaa and giza governorate (1.8%). in upper egypt, however all 610 rodent sera collected in aswan, red sea pernees and new valley adjacent to sudan were negative. the highest percentage of positive sera wa ...19911880412
hantaviral antigens and antibodies in wild rodents in portugal.small rodents of the species rattus norvegicus and rattus rattus have been captured between 1986 and 1988 in several areas of southern portugal. a total of 135 animal specimens were examined for hantaviral antigens in lung sections and 5 have been found positive. some of the rodents were shown to have serum antibodies as detected by immunofluorescence in titres up to 1:256. this investigation proves for the first time the presence of hantavirus in wild rodent populations of portugal.19911683135
leishmania infecting man and wild animals in saudi arabia. 9. the black rat (rattus rattus) a probable reservoir of visceral leishmaniasis in gizan province, south-west saudi arabia.twenty-two black rats (rattus rattus) were captured in houses where parasitologically confirmed cases of human visceral leishmaniasis had been recorded in al-arda emara, gizan province, south-west saudi arabia. four of the rats were found to be infected with leishmania; isoenzyme characterization showed that 3 were infected with l. donovani sensu lato zymodeme lon42 and the fourth with l. infantum zymodeme lon49. l. donovani s.l. lon42 has also been isolated from human visceral leishmaniasis pat ...19921475818
peripheral anosmia and the discrimination of poisoned food by rattus rattus l. 19751122203
geographical distribution of twelve transferrin alleles in black rats of asia and oceania.about 450 black rats (rattus rattus) were collected from 25 localities in asia and oceania. their serum transferrins were analyzed by a newly developed thin layer acrylamide gel electrophoresis accompanied with acrinol pretreatment, exhibiting 12 transferrin bands. generally, asian type rats (2n=42) had fast-moving transferrins (r-series), ceylon type (2n=40) moderately moving ones and oceanian type (2n=38) slowly moving ones (c-series). exceptionally, in northern india and pakistan all asian-ty ...19751132680
helminth parasites of rattus rattus diardi in bogor, west java, indonesia. 19751145235
variation of c-bands in the chromosomes of several subspecies of rattus rattus.all subspecies of black rats (rattus rattus) used in the present study are characterized by having large and clear c-bands at the centromeric region. the appearance of the bands, however, is different in the subspecies. chromosome pair no. 1 in asian type black rats (2n=42), which are characterized by an acrocentric and subtelocentric polymorphism, showed c-band polymorphism. in phillipine rats (r. rattus mindanensis) the pair was subtelocentric with c-bands, but in malayan black rats (r. rattus ...19751149576
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