| transplatation resistance to adenovirus-induced hepatocellular carcinomas. | two transplantable hepatic carcinomas of the hamster contained celo virus-induced tsta, confirming the etiological role of this avian adenovirus in the induction of hepatic tumors. transplantation resistnace could not be induced with oncogenic adenoviruses of human, simian, or canine origin. | 1975 | 170623 |
| cell-to-cell attachments and associations in tumors induced by celo virus or virus-transformed cells in hamsters. | cell-to-cell attachments or associations in expermentally induced sarcoma of chicken embryo lethal orphan virus (avian adenovirus) origin were studied in hamsters by electron microscopic examination. in many instances, the neoplastic cells seemed to be held together either by desmosome-like structures or an "interlocking" of their apposing plasma membranes. less frequently, the cells were attached by button-like projections between the cell surfaces. only rarely, interdigitation occurred between ... | 1975 | 171984 |
| a study of the sequences of chicken embryo lethal orphan (celo) virus dna present in a transformed hamster cell line with use of specific fragments of the virus genome. | | 1975 | 173080 |
| adenovirus respiratory infection in turkey poults. | a virus from turkey poults with respiratory signs was isolated in specific-pathogen-free embryonated chicken eggs and subsequently adapted to chicken embryo fibroblast and turkey kidney cell cultures, where round cell formation was observed. the cloned virus was ether-resistant and incorporated tridiated thymidine. intra-nuclear icosahedral virus particles of 80 nm were detected. these physicochemical characteristics place this isolant into the adenovirus group of viruses. the disease was experi ... | 1975 | 173277 |
| hemagglutinating properties of celo, an oncogenic avian adenovirus. | chicken-embryo-lethal-orphan (celo) virus, phelps strain, agglutinated erythrocytes at 37 c. the hemagglutinating activity, which is a function of complete and incomplete virus particles, was sensitive to heat but not to ph. the soluble components of the virus were similar in sedimentation characteristics to those obtained from human adenovirus type 1. the effects of chemical and physical agents on celo hemagglutinin, celo infectivity, and red-cell receptors suggested that the last were protein ... | 1975 | 173279 |
| identification of seven isolants of infectious bronchitis virus by interference with the b-1 isolant of newcastle disease virus. | seven isolants of infectious bronchitis virus (ibv) interfered with the development of hemagglutinins (ha) by the b-1 isolant of newcaslte disease virus (ndv) in eggs previously inoculated with these ibv isolants. the i50 [defined as the minimum amount of ibv needed to produce, upon inoculation in embryonating chicken eggs (ece), ha interference in 50% of these ece reioculated 10 hr later with 10(2,41 eid50 (ha) of the b-1 strain of ndv] was less than 1 eid50. the interference was considered spe ... | 1976 | 176988 |
| [study of the pathogenic qualities of 4 celo-virus strains isolated in bulgaria]. | four celo virus strains, isolated in this country, were used to infect 3-day-old chicks via the trachea, muscularly, orally, subcutaneously, and cerebrally. the chicks were killed on the 2nd, 4th, 6th, 9th and 16th day following inoculation. material was taken from each chick for morphologic, virologic, and serologic examination. the clinical course of the disease was also followed up. prior to killing some birds showed infirmity, difficult breathing, slightly expressed diarrhia, going off food, ... | 1975 | 179190 |
| [the significance of celo virus as a hatching egg contaminant with special reference to its oncogenic properties]. | a group of young hamsters was injected subcutaneously in the neck region with allantoic fluid containing celo virus. a second group received transplants of cells from tumours induced by celo virus. tumours developed in both groups. the latent period was shorter after transplantation than after virus inoculation. the tumours grew progressively, histologically resembling fibrosarcoma. it is recommended that hatching eggs infected with celo virus should not be used in vaccine production. | 1975 | 180924 |
| an adenovirus from a turkey pathogenic to both chicks and turkey poults. | an adenovirus, designated t-75 isolant, was isolated from the cloacal swab of a clinically normal turkey, 13 weeks old. the t-75 isolant was identified as an adenovirus on the basis of physicochemical properties, cytopathology, and agar-gel precipitin test. producing two-way cross-neutralization reactions with celo virus, the isolant was classified as an avian adenovirus of serotype 1. the t-75 isolant was pathogenic to both chicks and turkey poults, causing hepatitis, respiratory disease, atrop ... | 1976 | 186010 |
| avian cell cultures grown in an open system (dishes) without co2 incubator, and their use for virus cultivation. | an organic buffer, n-2-hydroxyethylpiperazine-n'-2-ethanesulfonic acid (hepes), in a culture medium made it possible to culture chick embryo fibroblast (cef), duck embryo fibroblast (def), and chick kidney (ck) cells in an open system (dishes) under incubation in a bacteriological incubator, requiring no co2 incubation. cef, def, and ck cells cultured with this system were suitable for cultivation of avain viruses such as newcastle disease virus, celo virus, marek's disease virus, and turkey her ... | 1976 | 186014 |
| chick embryo lethal orphan (celo) virus-induced early and late polypeptides. | | 1977 | 193270 |
| chicken embyro lethal orphan (celo) virus dna present in hamster cell lines derived from celo-induced hepatomas. | the kinetics of renaturation of the isolated dna fragments of chicken embryo lethal orphan (celo) virus generated by the restriction enzyme ecor1 was measured in the presence of dna extracted from two lines of celo virus-induced hamster hepatoma cells and from control hamster cells. one hepatoma cell line (cilt-2), which did not produce the celo virus tumor (t) antigen, lacked sequences from about one-half the virus genome while the other hepatoma cell line (cehep), which did produce the celo vi ... | 1978 | 202577 |
| some adenovirus dna is associated with the dna of permissive cells during productive or restricted growth. | we have investigated the association of viral dna with cell dna in chicken embryo kidney (cek) cells productively infected with chicken embryo lethal orphan (celo) virus and in human (hek) cells infected with mutants ts36 and ts125 of human adenovirus type 5 under permissive and restrictive conditions. cell and viral dna molecules were separated after celo virus infection of cek cells by alkaline sucrose gradient centrifugation, network formation, and cscl density gradient centrifugation, method ... | 1978 | 202728 |
| subclinical pneumonia associated with an experimental adenovirus infection in the domestic fowl and the effect of concurrent infectious laryngotracheitis virus. | a celo-type adenovirus (av) isolated from fowls with respiratory disease was inoculated experimentally into the tracheas of young birds. no symptoms referable to respiratory infection were evident. post mortem examination between days 2 and 5 after inoculation revealed pneumonia involving up to 30 per cent of the surface of the lungs. histologically, a focal to diffuse interstitial lymphocytic infiltration and bronchiolar degeneration were present. concurrent infections with a mild strain of inf ... | 1978 | 203988 |
| virus-specific markers and virus-like particles in cell lines of tumors produced by celo virus in syrian golden hamsters. | cell lines were established from 2 primary hepatocellular carcinomas (hc's) and 3 sarcomas produced in syrian golden hamsters inoculated as newborns with chicken embryo lethal orphan (celo) virus. cell lines from 2 sarcomas (cot, cmt) and 1 hc (cehep) produced celo virus-specific t-antigen. the antigen was not detected in cells of the third sarcoma line (rct) until they had undergone more than 34 passages in vitro. although 5-10% of cells in the second hc line (cilt/2) contained t-antigen during ... | 1978 | 209200 |
| cell cycle-dependent multiplication of avian adenoviruses in chicken embryo fibroblasts. | propagation of celo virus employing confluent monolayers of chicken enbryo fibroblasts (cef) yielded virus titers one to two logs lower than those from confluent chicken kidney (ck) cells. an enhancement of virus production in cef as measured by plaque formation was obtainedby infectng cultures in the growing non confluent state. measurements of 3h-thymidine incorporation revealed a positive correlation between the dna synthesis of cef cultures at the time of inoculation and the amount of progen ... | 1978 | 209769 |
| [attempts to demonstrate and identify avian adenoviruses by an immunofluorescence method]. | a specific conjugate of a hyperimmune serum, obtained from rabbits with the use of the reference phelps-celo strain, was employed in a direct immunofluorescence method to investigate more than 320 lamelles with cell cultures infected with 4 field celo virus strains and the reference phelps-celo strain. it is stated this method is specific and prompt for the early diagnosis and identification of adenoviruses (celo viruses). | 1978 | 210562 |
| unusual features of the oncogenicity of chicken embryo lethal orphan (celo) virus in hamsters. | | 1979 | 230532 |
| egg transmission of avian adenovirus-associated virus and celo virus during a naturally occurring infection. | both avian adenovirus-associated virus (a-av) and celo virus were isolated from the embryonating eggs of 25-week-old black sex-linked hens during a naturally occurring infection. in the first 7 days of egg collection, a-av was isolated from 10 of 43 (23.2%) embryonating eggs, and celo virus was isolated from 8 of 43 (18.6%) embryonating eggs. both viruses were isolated from six eggs. in the next 16 days of egg collection, a-av and celo virus were coisolated from 1 of 127 (0.8%) eggs; all other s ... | 1979 | 230761 |
| [physico-chemical properties of celo virus strains isolated in bulgaria]. | studied were some physico-chemical properties of four celo virus strains isolated in bulgaria. their behaviour to ether, chloroform and 25 per cent trypsin, and their state at 56 degrees c and at ph 3, 0 were determined through their infectious titer as obtained on 9--10-day old chicken embryos. it was found that the size of the investigated viruses is within the range of 50 to 100 mmu, they belong to the dna-possessing group, are resistant at 56 degrees c and at ph equals 3,0. they are not sens ... | 1975 | 236618 |
| [the effect of mycoplasma synoviae infection on the state of health and results of fattening of broiler chickens compared with the effects of various virus infections. a field study (author's transl)]. | field studies in 160 flocks of broiler chickens in two areas in the netherlands showed that mycoplasma synoviae infection, the presence of which was detected by serological testing in 17.5 per cent, had only a slight adverse effect on the results of fattening. mycoplasma synoviae as well as ib infections were found to be more common in flocks affected with colibacillosis and/or in which higher proportions of birds were condemned because of polyserositis. infectious bursal disease, ib and celo vi ... | 1979 | 442052 |
| tumor-specific transplantation antigen(s) of bovine adenoviruses. | protection against bovine adenovirus type 3-induced primary or transplantable tumors was studied in hamsters immunized with bovine adenoviruses, human adenovirus type 12 (a-12), simian adenovirus type 7 (sa7), or chicken-embryo-lethal-orphan (celo) virus. newborn hamsters inoculated with 2.3 times 10-5 plaqueforming units of bovine adenovirus type 3 were given injections of bovine serotypes 1, 2, or 3 during the latent period of tumor development. no hamsters immunized with type 3 and only 47% o ... | 1975 | 803562 |
| antigenic characterization of the inclusion body hepatitis virus. | proof that inclusion body hepatitis of chickens (ibhc) is caused by a virus (ibhv) was established in 1973. characterization of ibhv has been conducted by employing the standard criteria for virus classification. the results have indicated that ibhv is a member of the avian adenovirus group. however, no antigenic relationship was found between ibhv and two other avian adenovirus isolates (celo and indiana c) as observed by hemagglutination (ha) and virus-serum neutralization tests. another adeno ... | 1975 | 804835 |
| identification of self-complementary virus-specific ribonucleic acid in chick kidney cells infected with chicken embryo lethal orphan virus. | rna was extracted from primary chicken embryo kidney (cek) cells infected with chicken embryo lethal orphan (celo) virus and exposed to a pulse of (5-3h)-uridine late in infection. when this rna was self-annealed, 4.5% became resistant to pancreatic ribonuclease digestion. the ribonuclease-resistant rna was isolated by chromatography on sephadex g-100, and the rna was found to have the characteristics of a double-stranded molecule of sedimentation coefficient 8s. half of the column-isolated rna ... | 1975 | 1167576 |
| complementary strands of celo virus dna. | when alkali-denatured dna from celo virus (an avian adenovirus) was annealed for 15 min at 37 c in 0.1 m nacl, 70% of the molecules formed single-stranded circles. this is probably due to base pairing of complementary sequences not more than 110 nucleotides long at the ends of the single strands and implies an inverted terminal repetition in the duplex dna similar to that reported for the dna from human adenoviruses. the circular molecules had a uniform length that was approximately the same as ... | 1975 | 1167606 |
| sequence of an avian adenovirus (celo) dna fragment (0-11.2%). | | 1991 | 1849634 |
| sequence of an avian adenovirus (celo) dna fragment (0-11.2%) | | 1990 | 2160072 |
| serological surveillance for antibodies against different avian infectious agents on turkey flocks naturally infected with turkey rhinotracheitis. | turkey rhinotracheitis (trt) in the state of baden-württemberg, germany appears to have become endemic affecting all farms and every new restocking. in 5 meat turkey flocks, serological surveillance for antibodies to trt-, ib- and ibd-viruses, as well as to pasteurella multocida were carried out using elisa tests. furthermore, sera were examined for the presence of antibodies to avian adenovirus (celo virus), reo- and paramyxo-viruses 1 and 3. the birds were bled at 4 week intervals starting at ... | 1990 | 2168612 |
| [the use of embryonic chicken liver cell culture for the diagnosis of virus infections in hens]. | embryonic chicken liver cell culture has proved to be an appropriate and sensitive substrate for propagation of virus of infectious laryngotracheitis, infectious bronchitis, infectious bursitis, egg-drop syndrome, and celo virus of fowl. microtest plates, too, were suitable for preparation of embryonic chicken liver cell culture as primary culture. | 1989 | 2505729 |
| [cloning of terminal fragments of the avian adenovirus celo genome and isolation of a recombinant plasmid carrying the viral oncogene]. | the terminal fragment of avian adenovirus celo has been cloned in a plasmid vector. the obtained recombinant plasmid pcbe1 carries the terminal bamhi-e fragment of celo dna. transfection of a nonpermissive culture of rat2 cell line by the plasmid dna results in formation of transformation focuses. the cloned bamhi-e fragment of celo dna is concluded to contain the viral oncogene. thus, the celo genome region deriving the bamhi-e fragment is "left". | 1988 | 2842669 |
| [avian celo adenovirus as a possible contaminant in cell cultures of japanese quail embryos]. | avian adenovirus celo was found to replicate poorly in japanese quail embryos (jqe) and cell cultures of them. the infectious process in these systems was latent. the antigen of adenovirus celo in jqe cell culture was detectable by the fluorescent antibody method (fam) within the first 24-72 hours after inoculation as fluorescent cytoplasmic granules. subsequently, fluorescence of nuclei and macrophage cytoplasm was observed. the results indicate that jqe and their cell cultures are not contamin ... | 1988 | 2854677 |
| va rnas from avian and human adenoviruses: dramatic differences in length, sequence, and gene location. | human adenoviruses encode low-molecular-weight rnas, so-called va rnas, which are transcribed by rna polymerase iii. these rnas are required for an efficient translation of viral mrnas late after infection. the genes for the va rnas in the genome of celo virus were mapped and characterized. the results showed a number of surprising differences between celo virus and human adenovirus type 2 (ad2). thus, the celo virus genome encoded only one va rna species, in contrast to human ad2, which encoded ... | 1986 | 3009871 |
| preferential clustering of viral dna sequences at or near the site of chromosomal rearrangement in fowl adenovirus type 1 dna-transformed cell lines. | all six transformants obtained by inoculating fowl adenovirus type 1 (celo virus) dna or its fragments into a rat cell line of normal karyotype had more than 50 copy-equivalents of viral dna sequences. each of the transformants had almost all if not all of these viral dna sequences clustered on a marker chromosome(s). although the marker chromosome(s) differed from one cell line to another, viral dna sequences preferentially clustered in or near the achromatic (or light-stained) region of the g- ... | 1987 | 3023693 |
| a trivalent antigen for the detection of type i avian adenovirus precipitin. | a double immunodiffusion antigen prepared from cell-culture-propagated celo virus was not capable of detecting precipitin directed against all of the type i avian adenovirus (fowl adenoviruses) isolates tested. however, an antigen pool containing celo-4, b-3, and ibh-2 (tipton) fowl adenovirus isolates detected precipitin directed against representative isolates of 10 type i serotypes. additionally, this antigen pool markedly improved detection of adenovirus field exposure. | 1987 | 3039966 |
| chick embryo lethal orphan (celo) virus: some physical and immunological properties. | | 1971 | 4105260 |
| temperature-sensitive conditional-lethal mutants of an avian adenovirus (celo). i. isolation and characterization. | | 1971 | 4106984 |
| cytochemistry and immunofluorescence of celo virus, an oncogenic avian adenovirus, in chicken embryo kidney and chicken embryo fibroblastic cell cultures. | | 1972 | 4114142 |
| induction of tumors in hamsters with an avian adenovirus (celo). | when newborn hamsters were inoculated subcutaneously with chicken-embryo lethal orphan virus, tumnors developed at the site of inoculation in 23 out of 69 hamsters within 88 to 195 days of inoculation. these tutlnors and tissue cultures, prepared from a primary tumor, were transplantable to newborn and weanling hamsters. the primary tumnors and tissue cultures of a primary tumor were free of demnonstrable infectious virus. the virus is the first "nonhuman" adenovirus found to induce tumors in ha ... | 1965 | 4283925 |
| [experience of the precipitation reaction for the practical diagnosis of infection of fowls with the viruses of infectious laryngotracheitis and infectious bronchitis as well as with celo virus]. | | 1968 | 4302204 |
| specific tumour antigen induced by chick embryo lethal orphan (celo) virus. | | 1969 | 4306298 |
| [celo virus in gosslings]. | | 1969 | 4309184 |
| celo virus infection in chickens: clinical and serological response to experimental and accidental infection. | | 1969 | 4311860 |
| comparison of transformation and t antigen induction in human cell lines. | skin fibroblast cultures were established from eight individuals. these cell cultures, together with wi-38 cells, were examined for susceptibility to transformation by sv40 virus. four transformation-susceptible cell lines (ts), established from patients with down's syndrome, were found to be three to four times more susceptible to transformation than transformation-resistant cell lines (tr) from normal individuals. tr and ts cell lines were compared for their susceptibility to induction of sv40 ... | 1970 | 4314550 |
| [applicability of tissue culture antigens to the detection of infectious bronchitis, infectious laryngotracheitis, fowl pox and celo virus infection by the agar gel precipitation test]. | | 1969 | 4319653 |
| [pathology of infection with celo virus in chickens]. | | 1970 | 4325375 |
| [celo virus infection in turkeys]. | | 1971 | 4325536 |
| [the production of serum precipitins as evidence of the virus of infectious bronchitis, infectious laryngotracheitis and fowl pox, as well as of avian adenovirus (celo)]. | | 1970 | 4325734 |
| morphology of tumours induced in hamsters by celo virus, tumour tissue, and tumour cells grown in culture. | | 1972 | 4335495 |
| studies on interferon induction by the avian adenovirus celo in chicken cells. | | 1972 | 4344312 |
| attempts to produce tumors in mice with celo virus. | | 1973 | 4348163 |
| induction of tumors in the liver of hamsters by an avian adenovirus (celo). | | 1973 | 4350030 |
| oncogenicity of plaque variants of celo virus in newborn hamsters. | | 1973 | 4350666 |
| serological evidence for celo virus infection in chickens and turkeys in denmark. | | 1973 | 4353424 |
| [fluorescence serological and histological studies on celo-virus infected chick embryos]. | | 1973 | 4354471 |
| spread of an avian adenovirus (celo virus) to uninoculated fowls. | | 1974 | 4364598 |
| micro hemagglutination-inhibition test for detection of celo virus antibodies. | | 1974 | 4368915 |
| [sensitivity of female japanese quail, their embryos and a cell culture of quail fibroblasts to infection by the avian adenovirus celo]. | | 1974 | 4373928 |
| [attempts at isolating celo virus in bulgaria]. | | 1974 | 4377475 |
| [some properties of celo virus strains]. | | 1974 | 4438143 |
| [studies on various properties of celo virus antigens using immunoprecipitation]. | | 1972 | 4626973 |
| the chicken embryo lethal orphan virus (celo). | | 1973 | 4632593 |
| cationic stability studies with celo, newcastle, and infectious bronchitis viruses. | | 1973 | 4735358 |
| replication of an avian adenovirus (celo) large-plaque mutant in chick kidney cells. 1. an electron-microscope study. | | 1973 | 4735360 |
| the inhibition of infectious bronchitis virus multiplication by celo virus in the fowl embryo. | | 1973 | 4792016 |
| replication of a type i avian adenovirus (celo) mutant in the chicken embryo. | | 1973 | 4799980 |
| in vitro transformation by an avian adenovirus (celo). ii. hamster kidney cell cultures. | | 1969 | 4894304 |
| the in vitro transformation by an avian adenovirus (celo). 3. human amnion cellcultures. | | 1969 | 4898046 |
| isolation of temperature-sensitive conditional lethal mutants of an avian adenovirus (celo), and localization of viral antigen in cells infected with them. | | 1970 | 4912636 |
| demonstration of a tumour and transplantation antigen in hamster tumours induced by an avian adenovirus (celo). | | 1970 | 4916367 |
| celo virus: an oncogenic virus. brief report. | | 1970 | 4917466 |
| hamster tumors induced by type i avian adenovirus (celo). i. histopathology and neoantigen of virus-induced and transplanted tumors. | | 1970 | 4925755 |
| the development of chick-embryo-lethal-orphan (celo) virus t and v antigens in lytically infected chick kidney cells. | | 1971 | 4925904 |
| the potentiation of type 1 adeno-associated virus by temperature-sensitive conditional-lethal mutants of celo virus at the restrictive temperature. | | 1971 | 5000131 |
| replication of celo virus in the chicken chorio-allantoic membrane. | | 1971 | 5002517 |
| cytochemical and immunofluorescence study of an oncogenic avian adenovirus (celo) in mammalian cell cultures. | chicken embryo lethal orphan (celo) virus replication studies in adult hamster kidney and green monkey kidney cell cultures by means of infectivity, cytochemistry, and fluorescent-antibody techniques indicated that replication in hamster kidney cells was limited to the production of neoantigen. production of virus in green monkey kidney cells was limited but appeared to exceed the production of virus in hamster kidney cells. the data indicated that the replication cycle of celo virus is abortive ... | 1971 | 5005293 |
| a plaque assay for chick-embryo-lethal-orphan (celo) virus. | | 1971 | 5101572 |
| mature form of the deoxyribonucleic acid from chick embryo lethal orphan virus. | the deoxyribonucleic acid (dna) of chick embryo lethal orphan (celo) virus, an oncogenic avian adenovirus, had a biphasic denaturation profile indicating intramolecular base composition heterogeneity. this was confirmed by shearing the dna and centrifuging it to equilibrium in cs(2)so(4) in the presence of hgcl(2) when two bands were formed. no circular molecules formed when celo virus dna was annealed, although lambda dna formed circles under the same conditions. no circular molecules were foun ... | 1971 | 5165858 |
| chick embryo lethal orphan (celo) virus as a possible contaminant of egg-grown virus vaccines. | | 1969 | 5278159 |
| tumor induction in hamsters inoculated with an avian adenovirus (celo). brief report. | | 1970 | 5466139 |
| [studies on the replication of an adenolike virus of chickens (celo)]. | | 1967 | 5628251 |
| growth of chicken-embryo-lethal-orphan (celo) virus in chicken embryo neuroglial and chicken embryo fibroblastic cell cultures. | | 1968 | 5658886 |
| [relationship between celo-virus-infection and other diseases of cickens. find out of level of significance]. | | 1968 | 5748592 |
| biological properties of celo virus: stability to various agents, and electron-microscopic study. | | 1963 | 5888496 |
| [enzyme activity determinations in allantoic fluid in chick embryos after infection with celo-virus]. | | 1965 | 5891560 |
| [the influence of the celo virus on artificial infection with mycoplasma gallisepticum]. | | 1966 | 5955161 |
| the influence of egg weight on the propagation of newcastle disease, influenza, and celo viruses in embryonating eggs. | | 1966 | 6007132 |
| the structural proteins of chick embryo lethal orphan virus (fowl adenovirus type 1). | chick embryo lethal orphan (celo) virus (fowl adenovirus type 1) contains at least 14 structural proteins with polypeptide molecular weights ranging from 100k to about 6k. a nomenclature of the celo virion polypeptides is presented and the molar proportion of each polypeptide has been estimated. the celo virus pentons were specifically released from the virion by dialysis against borate-based calcium-magnesium saline. the penton base (polypeptide iii, mol. wt. 92k) and two fibres were separated, ... | 1984 | 6092524 |
| dna-binding proteins of chick embryo lethal orphan virus: lack of complementation between early proteins of avian and human adenoviruses. | chick cells infected by chick embryo lethal orphan (celo) virus (fowl adenovirus type 1) contained four prominent virus-specific, structurally related dna-binding proteins with mol. wt. of 74k, 64k, 56k, 52k, and two minor forms. the celo virus dna-binding proteins were phosphorylated, delayed-early nuclear proteins. celo virus early proteins were expressed in bhk cells, but did not complement human adenovirus type 5 mutants with lesions e1a, e2a or e2b. moreover, celo virus dna-binding proteins ... | 1984 | 6092525 |
| structural organization and polypeptide composition of the avian adenovirus core. | celo virus (fowl adenovirus 1) contained three core polypeptides of molecular weights 20,000, 12,000, and 9,500. the core was similar to that of human adenoviruses, with some evidence of compact subcore domains. micrococcal nuclease digestion of celo virus cores produced a smear of dna fragments of gradually decreasing size, with no nucleosome subunit or repeat pattern. moreover, when digested cores were analyzed without protease treatment, there was again no evidence of a nucleosome substructur ... | 1984 | 6092686 |
| enhancement and inhibition of celo virus pathogenicity in quail by avian adenovirus-associated virus. | dual infection of 12 day-old quail (colinus virginianus) with 10(6) plaque forming units of celo virus and low doses of avian adeno-associated virus (a-av), resulted in significant enhancement of celo virus-induced mortality, whereas dual infections with high doses of a-av resulted in a delay in mortality. a-av induced enhancement and inhibition of celo virus pathogenicity could be blocked by the addition of a-av antiserum prior to infection. | 1980 | 6253685 |
| an enzyme-linked immunosorbent assay for detection of antibodies to avian adenovirus and avian adenovirus-associated virus in chickens. | an enzyme-linked immunosorbent assay system (elisa) was adapted for the detection of antibodies to avian adenovirus (av) and avian adenovirus-associated virus (a-av). both before and after exposure, sera from chickens undergoing natural and experimental infections were assayed by elisa, virus neutralization (vn), and immunodiffusion (id) for antibody to both celo virus and a-av. the elisa system was found to be comparable to vn for determining antibody concentrations to celo virus and a-av. in m ... | 1980 | 6254491 |
| neutralizing antibodies to celo and avian adenovirus-associated viruses in the albumen of chicken eggs. | neutralizing antibodies to celo virus and to avian adenovirus-associated virus (a-av) were detected in the albumen of eggs from four hens inoculated with these viruses. the antibody concentrations of serum, yolk, and albumen were determined before inoculation and at various times postinoculation (pi) by enzyme-linked immunosorbent assay (elisa) and virus-neutralization (vn) tests. the antibody concentration in albumen was 0.3% to 1.0% of that detected in serum and yolk. uninoculated hens showed ... | 1980 | 6268041 |
| studies on egg drop syndrome (eds) and chick embryo lethal orphan (celo) avian adenovirus dnas by restriction endonucleases. | restriction endonucleases ecori, bamhi, hindiii, bgli, bglii, hpai and psti recognized 48 cleavage sites in eds adenovirus strain b8/78 dna, whereas celo virus dna was cut into 61 fragments by the same enzymes. no similarity could be detected in the restriction patterns obtained from the two avian adenoviruses. the calculated mol. wt. of b8/78 dna was 22.6 x 10(6) [about 34.2 kilobases (kb)] and that of celo virus dna was 28.9 x 10(6) (about 43.7 kb). the fragments generated from b8/78 dna by ec ... | 1981 | 6271918 |
| egg transmission of avian adenovirus-associated virus and celo virus during experimental infections. | | 1981 | 6275751 |
| adenovirus-related rna sequences in human neurogenic tumours. | thirty two human tumours, mainly neurogenic, have been investigated for the presence of adenovirus-related rna sequences. 3h-labelled tumour virus dna probes derived from human adenoviruses types 2 and 12, bovine adenovirus type 3, and avian adenovirus celo were hybridized in-situ on tumour kryostat sections under conditions that detect complementary rna. tumour virus-related rna was detected in 62% of all tumours tested, but was not detectable in normal human brain tissues. expression of tumour ... | 1982 | 6278813 |
| a common sequence in the inverted terminal repetitions of human and avian adenoviruses. | the termini of the avian chick embryo lethal orphan (celo) virus dna have been sequenced. the results revealed a 63-bp-long inverted terminal repetition (itr) which shared the sequence ataata with all adenovirus termini, thus far analyzed. the celo virus itr differed from those of the mammalian adenoviruses in two major aspects: (i) it is not a perfect duplication; (ii) it begins with a 5'-guanylic acid residue instead of the cytidylic acid normally observed in adenoviruses. | 1982 | 6290323 |
| biochemical studies of celo virus: an oncogenic avian adenovirus. | | 1983 | 6297961 |
| comparative sequence analysis of the inverted terminal repetition in the genomes of animal and avian adenoviruses. | the nucleotide sequences at the inverted terminal repetitions from two animal adenoviruses, infectious canine hepatitis virus and equine adenovirus, and from one avian adenovirus, celo, were analyzed. dnas from infectious canine hepatitis virus and equine adenovirus contain a homologous region which is 23 nucleotides long from the terminus. the first 17 nucleotides of this region are identical to the ones in human adenovirus type 2 dna. the striking homologous sequence of 14 nucleotides, conserv ... | 1983 | 6301151 |
| a comparison of the terminal protein and hexon polypeptides of avian and human adenoviruses. | it was found that the virion terminal protein of chick embryo lethal orphan (celo) virus had a molecular weight of 46,000, and the hexon a molecular weight of 100,000. 125i-labelled tryptic and chymotryptic peptide maps of the hexons and terminal proteins from celo virus and human adenovirus type 5 (ad5) differed. however, limited proteolysis of celo virus and ad5 terminal proteins by protease v8 showed similarities which were not detected in the case of the two hexons. | 1983 | 6304239 |
| [amplification of virocellular sequences avian adenovirus-induced tumor cells]. | adenovirus-induced tumor cells (including transformed cells) examined contain a part of the viral genome. however, number of molecules of the virus dna persisting in a cell varies in the tumor cell lines. tumor cell lines which were induced by celo virus, an avian adenovirus, carried the virus dna in the range from 1 to 920 molecules per cell. of the tumor cell line which carried large numbers of molecules of the virus dnr, one tumor cell line, rt 13 (160 molecules/cell), was studied both at the ... | 1984 | 6324694 |