Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
|---|
| [preliminary study on the diagnosis of avian infectious bronchitis by fluorescent antibody technic]. | 1971 | 4997553 | |
| antigenic variation in strains of avian infectious bronchitis virus. | 1971 | 4999979 | |
| the use of the gel diffusion precipitin technique with avian infectious bronchitis nephritis virus. | 1971 | 5001539 | |
| pathogenesis of oviduct lesions in immature chickens following exposure to infectious bronchitis virus at one day old. | 1971 | 5547754 | |
| abnormalities in laying chickens following exposure to infectious bronchitis virus at one day old. | 1971 | 5547755 | |
| interaction of mycoplasma gallisepticum, mild strains of newcastle disease virus and infectious bronchitis virus in chickens. | 1971 | 5569701 | |
| measurement of antigenic and pathogenic variability of infectious bronchitis virus strains by trachea. | 1971 | 4932186 | |
| characterization of a new infectious bronchitis virus isolate. i. serological and pathogenicity studies of clark 333. | 1971 | 4938694 | |
| immune response in chickens to infectious bronchitis virus, strain 33. i. response to beta-propiolactone-inactivated virus. | 1971 | 4945988 | |
| immune response in chickens to infectious bronchitis virus, strain 33. ii. response to virus propagated in chicken embryo kidney cells. | 1971 | 4945989 | |
| immunofluorescence of avian infectious bronchitis virus and newcastle disease virus in singly and dually infected cell cultures. | 1971 | 4945993 | |
| adaptation and propagation of avian infectious bronchitis virus in embryonic turkey kidney cell cultures. | 1971 | 4926595 | |
| criteria for examining the immune response to infectious bronchitis virus. | 1971 | 4926598 | |
| [veterinary and sanitary precautions against avian infectious bronchitis]. | 1971 | 5166282 | |
| pathogenicity of four serotypes of avian infectious bronchitis virus for the oviduct of young chickens of various ages. | 1972 | 4552675 | |
| persistence of virus in the tissues and development of the oviduct in the fowl following infection at day old with infectious bronchitis virus. | 1972 | 4552937 | |
| pathogenicity of two embryo-passage levels of avian infectious bronchitis virus for the oviduct of young chickens of various ages. | 1972 | 4565461 | |
| use of allantoic cells for the detection of avian infectious bronchitis virus. | 1972 | 4622264 | |
| stabilizing effect of magnesium sulfate on avian infectious bronchitis virus propagated in chicken embryo kidney cells. | the beaudette strain of avian infectious bronchitis virus propagated in chicken embryo kidney cells is stabilized by exposure to 1 m mgso(4) at 50 c for 80 min, at ph values ranging from 4 to 10. | 1972 | 4622823 |
| replication of avian infectious bronchitis virus in african green monkey kidney cell line vero. | 1972 | 4627930 | |
| avian infectious bronchitis virus: serologic response of chickens to seven beta-propiolactone-inactivated strains. | 1972 | 4640181 | |
| egg quality and production following infectious bronchitis virus exposure at one day old. | 1972 | 4643125 | |
| [studies on antigenic and immunologic properties of the infectious bronchitis virus in the ussr]. | 1972 | 4654924 | |
| the effectiveness of immunization to newcastle disease, avian infectious bronchitis and avian infectious coryza with inactivated combined vaccines. | 1972 | 4668500 | |
| buoyant density of hemagglutinating encephalomyelitis virus of swine: comparison with avian infectious bronchitis virus. | 1972 | 4339084 | |
| avian adenovirus alone or followed by infectious bronchitis virus in laying hens. | 1972 | 4339282 | |
| the replication of infectious bronchitis virus in fowl trachea. | 1972 | 4344144 | |
| the immune response to infectious bronchitis virus determined by respiratory signs, virus infection, and histopathological lesions. | 1972 | 5016523 | |
| chemical characterization of avian infectious bronchitis virus receptor sites. | 1972 | 5023057 | |
| the effect of parameter selection in evaluation of infectious bronchitis virus vaccine. i. evaluation of the connecticut strain by virus recovery tests. | 1972 | 5038646 | |
| the effect of parameter selection in evaluation of infectious bronchitis virus vaccine. ii. effect of single vs. serial passage of tracheal swab material, and of the positive-negative vs. a point-value system in reporting results. | 1972 | 5038655 | |
| attachment of avian infectious bronchitis virus to chicken embryo kidney cells. | 1972 | 5066126 | |
| some characteristics of isolates of infectious bronchitis virus from commercial vaccines. | 1972 | 5079872 | |
| immune response in chickens to infectious bronchitis virus, strain 33. 3. beta-propiolactone-inactivated and live-virus vaccines compared by statistical methods. | 1972 | 5079874 | |
| research note--avian encephalitis virus as a chicken kidney cell-culture contaminant and its effect on the growth of infectious bronchitis virus. | 1973 | 4355965 | |
| serial passage of 3 strains of avian infectious bronchitis virus in african green monkey kidney cells (vero). | 1973 | 4203249 | |
| plaque formation by infectious bronchitis virus in chicken embryo kidney cell cultures. | 1973 | 4712808 | |
| a direct complement fixation test for infectious bronchitis virus using heat-inactivated chicken sera. | 1973 | 4722792 | |
| a new serotype of infectious bronchitis virus responsible for respiratory disease in arkansas broiler flocks. | 1973 | 4748341 | |
| neutralizing antibody in nasal secretions of chickens following administration of avian infectious bronchitis virus. | 1973 | 4772938 | |
| the inhibition of infectious bronchitis virus multiplication by celo virus in the fowl embryo. | 1973 | 4792016 | |
| the pathogenesis of virulent and avirulent avian infectious bronchitis virus. | 1973 | 4573193 | |
| avian infectious bronchitis virus characteristics of an inhibitor found in serum. | 1973 | 4120845 | |
| the nucleic acid of infectious bronchitis virus. | 1973 | 4129679 | |
| the survival of infectious bronchitis (ib) virus in water. | observations on the survival of infectious bronchitis virus in 3 mains waters showed that it survived for a much shorter period in one of them which contained a relatively high content of copper (0.2 mg/1). other factors adversely affecting survival were 5 ppm of free residual chlorine and increase in temperature over the range of 20-35 degrees c. survival of virus was prolonged in the presence of 0.1% w/v powdered skim milk (psm), 1,0% w/v poultry mash, 1,0% w/v fresh poultry droppings, rust an ... | 1973 | 18777388 |
| a virus neutralization screening test: its limitations in classifying field isolates of infectious bronchitis virus. | a virus neutralization screening test using a 1:5 serum dilution of known antisera against approximately 100 embryo infective doses50 of an unknown virus was used to classify field isolates of infectious bronchitis virus. such a test will detect the major antigen and antibody relationships. the weakness of a screening test is that it does not quantitatively measure the minor antigen-antibody relationships between strains which would be essential to develop a classification scheme for infectious ... | 1973 | 18777389 |
| the combined influence of age of embryo and temperature and duration of incubation on the replication and yield of avian infectious bronchitis (ib) virus in the developing chick embryo. | two experiments were undertaken to investigate the combined influence of the age of embryo at infection and the temperature and duration of incubation on the replication and yield of the beaudette strain of ib virus lin allantoic fluid and the chorio allantoic membrane. in general a higher titre of virus was found in the allantoic fluid and chorioallantoic membrane of living embryos than of dead ones and with continued incubation of dead embryos the titre of virus fell still further. for embryos ... | 1973 | 18777405 |
| the histopathogenesis of the nephrosis-nephritis syndrome. | chickens were infected with the australian t-strain of infectious bronchitis virus. histologically the disease started as a mild tracheo-bronchitis, accompanied by severe degenerative changes of the renal epithelia and marked inflammatory changes in the intertubular interstitium of renal cortex and medulla and in the propria and submucosa of the ureters and the main collecting ducts. there was a good correlation between the sequence of clinical signs and pathophysiological changes of the disease ... | 1974 | 18777251 |
| serological comparisons of strains of infectious bronchitis virus using plaque-purified isolants. | 1974 | 4597565 | |
| infectious bronchitis and mixed infections of mycoplasma synoviae and escherichia coli in gnotobiotic chickens. i. synergistic role in the airsacculitis syndrome. | the synergistic role of infectious bronchitis virus (ibv) and mixed infections of mycoplasma synoviae (ms) and escherichia coli (ec) in the airsacculitis syndrome was evaluated in gnotobiotic chickens. relative air sac lesion score indexes, in descending order of severity, from various combinations of organisms were: 9.5-ibv, ms, ec; 6.8-ibv, ec; 4.5-ibv, ms; 2.7-ibv; and 0.5-ms, ec. infectious bronchitis virus caused a mild fibrinous inflammation. m. synoviae combined with ibv increased heterop ... | 1974 | 4609905 |
| morphological variation among avian infectious bronchitis virus strains. | 1974 | 4819986 | |
| differentiation of two serotypes of infectious bronchitis virus by the macrophage migration-inhibition test. | 1974 | 4828582 | |
| preparation and immunological response to a new mixed vaccine composed of inactivated newcastle disease virus, inactivated infectious bronchitis virus, and inactivated hemophilus gallinarum. | 1974 | 4853743 | |
| some observations on the propagation of avian infectious bronchitis virus in tissue culture. | 1974 | 4207765 | |
| neutralizing and precipitating antibodies against infectious bronchitis virus in chickens. | 1974 | 4208959 | |
| avian infectious bronchitis: demonstration of serum igg- and igm-neutralizing antibody by sucrose density-gradient centrifugation and mercaptoethanol reduction. | 1974 | 4215411 | |
| the effect of the suppression of circulating antibody on resistance to the australian avian infectious bronchitis virus. | 1974 | 4419569 | |
| interferon induction by different strains of infectious bronchitis virus. | 1974 | 4423767 | |
| nephrosis in laying chickens caused by massachusetts-type infectious bronchitis virus. | 1974 | 4450393 | |
| the histopathology of an interstitial nephritis in the fowl produced experimentally with infectious bronchitis virus. | 1974 | 4452936 | |
| local immunity to avian infectious bronchitis in tracheal organ culture. | 1974 | 4368876 | |
| isolation of avian viruses from the eggs of raillietina tetragona and ascaridia galli. | 1974 | 4376077 | |
| avian infectious bronchitis: characteristics of the virus and antigenic types. | 1975 | 47725 | |
| potential for polyvalent infectious bronchitis vaccines. | numerous antigenic types and subtypes of infectious bronchitis virus (ibv) have been isolated and characterized from field epornitics of infectious bronchitis (ib). thus obvious failures in obtaining the necessary protection from vaccination have been documented and they underscore the urgent need for vaccines which stimulate a broader spectrum of protection from heterologous ibv challenge than is presently obtained. if polyvalent ib vaccines are to be employed, assurance must be provided that v ... | 1975 | 47726 |
| use of the indirect fluorescent antibody method for detecting antibodies to infectious bronchitis virus in chickens serum. | 1975 | 167061 | |
| letter: infectious bronchitis in vaccinated poultry. | 1975 | 167505 | |
| vaccination of young chickens with live vaccine against some new zealand isolates of infectious bronchitis virus. | 1975 | 170569 | |
| comparative growth kinetic studies on avian infectious bronchitis virus in different systems. | 1975 | 171289 | |
| haemagglutination by avian infectious bronchitis virus-a coronavirus. | the haemagglutinating ability of three strains of ibv was investigated. it was shown that whereas strain beaudette had no detectable haemagglutinin, both connecticut and massachusetts agglutinated red cells of various species. the haemagglutinin of connecticut was detectable after sucrose gradient purification whereas that of massachusetts required both the purification step and incubation with the enzyme phospholipase c to reveal it. the agglutination could be inhibited by specific antisera. so ... | 1975 | 170378 |
| serotyping of avian infectious bronchitis viruses by the virus-neutralization test. | the antigenic relationships of 12 strains of infectious bronchitis virus (ibv) were evaluated by a virus-neutralization procedure similar to that used in typing human rhinoviruses. such a procedure consists of reciprocal neutralization tests performed by reacting 32-320 eid50 or plaque-forming units of virus with 20 antibody units of antiserum. eight serologic groups were identified by chicken embryo assay, and 4 by plaque-reduction (90%). in general, serologic groupings were not distinct but re ... | 1975 | 169804 |
| morphological changes of chicken tracheas and tracheal organ cultures infected with avian infectious bronchitis virus studied in scanning electron microscope. | chicken tracheas infected in vitro in organ culture and in vivo with avian infectious bronchitis virus (ibv) were studied by scanning electron microscopy. in in vitro infection in organ culture the columnar epithelial cells lining the tracheal ring lost their cilia and rounded up in 48 hr. there were numerous elevations and holes on the infected cell surface. subsequently the cells sloughed off. in in vivo infection the tracheal epithelial cells lost their cilia in 4 days. these cells without ci ... | 1975 | 169800 |
| identification of infectious bronchitis virus by interference with the b-1 isolant of newcastle disease virus. waxing and waning of interference. | the massachusetts and the connecticut types of infectious bronchitis virus (ibv) were identified by interference in embryonating chicken eggs (ece) with the production of hemagglutinin by the b-1 isolant of newcastle disease virus (ndv). this interference test appears to be specific because the above interference was eliminated by adding type-specific anti-ibv serum to the ibv-ndv system; however, interference was not detectable when fowlpox virus (fpv) and infectious laryngotracheitis virus (lt ... | 1975 | 168852 |
| two new isolants of infectious bronchitis virus with polyvalent immunogenicity. | the immunizing capacity of two new field isolants of avian infectious bronchitis virus (ibv) was tested in vivo. chickens vaccinated with either isolant resisted challenge with 6 serotypes of ibv, including some of the types most commonly isolated from chickens. the two new isolants, identified herein as california "g" and california "s," appear to be immunologically different from each other and from the other 6 types tested. the polyvalent immunogenicity of both g and s is noteworthy, and pote ... | 1975 | 168851 |
| the polypeptide composition of avian infectious bronchitis virus. | avian infectious bronchitis virus grown in ovo was purified by differential centrifugation and isopycnic sedimentation in density gradients. the purified virus was analysed by sds polyacrylamide gel electrophoresis and found to comprise up to sixteen polypeptides, four of which were glycopeptides. bromelain treatment of the particles removed three polypeptides and two glycopeptides. | 1975 | 174524 |
| serological responses of broiler-type chickens, with and without newcastle disease and infectious bronchitis vaccine, to experimental infection with mycoplasma synoviae by foot pad, air sac and aerosol. | serum plate (sp) and tube agglutination (ta) reactions and geometric mean mycoplasma synoviae (ms.) hemagglutination-inhibition (hi) titers were determined on chickens infected at 21 days of age with ms. by foot pad, air sac and aerosol. one-half had been given newcastle disease (nd) and infectious bronchitis (ib) vaccine in the water at 20 days of age, and the other half had not been vaccinated with nd and ib vaccine. blood was taken at 3, 4, 6 and 8 weeks after ms. infection. geometric mean hi ... | 1975 | 168564 |
| effect of infectious bronchitis vaccination on the performance of live newcastle disease vaccine. | 1975 | 166478 | |
| in vitro cultivation of cells from the chorioallantoic membrane of chick embryos. | by treatment of chorioallantoic membranes from embryonated eggs with collagenase and hyaluronidase before the conventional application of trypsin cells could be grown in culture which supported growth of a large variety of myxoviruses, herpesviruses, avian reoviruses and the infectious bronchitis virus of chickens. the cultures could be used for sensitive plaque assays and neutralization tests. | 1975 | 165393 |
| effect of ph on the growth and cytopathogenicity of avian infectious bronchitis virus in chick kidney cells. | the growth of avian infectious bronchitis virus (ibv) in chick kidney cells at different ph values in the range 6.0-9.0 demonstrated that although the virus was released at a much faster rate at the higher ph values the titre tended to drop more quickly. at the acid ph values the virus was released more slowly but reached a maximum titre similar to that at the higher ph values and showed only minimum reduction in infectivity up to 49 hours post inoculation. the stability of virus in tissue cultu ... | 1975 | 2145 |
| ph stability studies with avian infectious bronchitis virus (coronavirus) strains. | a comparison of 17 infectious bronchitis virus strains, using the same test procedure and assay system, demonstrated that stability at an acid ph is a variable characteristic of the avian coronaviruses. | 1975 | 234539 |
| immune response to infectious bronchitis virus. | 1975 | 1092219 | |
| the ribonucleic acid of infectious bronchitis virus. | analysis of the nucleic acid of infectious bronchitis virus by sds polyacrylamide gel electrophoresis revealed an rna of molecular weight 9.0 times 10-6 daltons. the rna was shown to have a sedimentation coefficient of 50. | 1975 | 1119945 |
| characterization of a new infectious bronchitis virus isolate. iii. cell-culture adaptation of clark 333. | the clark 333 strain of infectious bronchitis virus (ibv) was substantially resistant to primary chicken cell-culture adaptation. more than 40 serial embryo passages were required before the virus would produce cytopathic alterations upon cell-culture inoculation. the cytopathic effect was characteristic of the effect of reported for ibv. adaptation was not accomplished by alternating serial passages in embryo and cell-cultured systems. a careful monitoring of cell-culture fluid infectivity by e ... | 1975 | 1120038 |
| the neutralizing characteristics of strains of infectious bronchitis virus as measured by the constant-virus variable-serum method in chicken tracheal cultures. | the constant-virus variable-serum neutralization test in chicken tracheal organ cultures was employed in cross-neutralization tests with the following infectious bronchitis viruses: massachusetts 41, connecticut, iowa 97, iowa 609, holte, jmk, clark 333, se 17, florida, and arkansas 99. these viruses all proved serologically distinct by this method. chickens immunized with the connecticut strain and later challenged with arkansas 99 were not protected against it. | 1975 | 1120040 |
| single and mixed infections of avian infectious bronchitis virus and mycoplasma gallisepticum. | comparative studies of the clinical signs, pathological changes, multiplication of the pathogens and serological responses were made of groups of chickens infected with either or both avian infectious bronchitis virus and mycoplasma gallisepticum. electron microscopic examination of thin sections of infected tracheas showed that the multiplication of m. gallisepticum was greatly enhanced in the tracheas of chickens which had been previously or simultaneously infected with avian infectious bronch ... | 1975 | 1126565 |
| immunity to avian infectious bronchitis. | avian infectious bronchitis is recognized clinically as a respiratory disease in its only natural host,the chicken, but the virus is disseminated throughout other systems by a viraemia with localization especially in the kidney and oviduct. the sensitivity or instability of the antigenic and immunogenic properties of the virus under laboratory stress or natural influences complicates the selection of seed virus for vaccines. modified or attenuated active virus vaccines induce greater protection ... | 1975 | 805074 |
| [differentiation of haemophilus strains isolated from chickens. iii. pathogenicity tests in chickens]. | pathogenicity tests of 6 isolates of the haemophilus-group i (h. paragallinarum) and 8 isolates of the haemophilus-group ii isolated from chickens in the federal german republic and one strain of h. parainfluenzae isolated from man were carried out in 6-week old spf-chickens. infectious coryza (coryza contagiosa gallinarum) could be produced in chickens with all strains of group i after experimental inoculation and by contact exposure. at necropsy 3 weeks post inoculation (p.i.) organisms of gro ... | 1975 | 18777310 |
| changes in the harderian gland of the chicken following conjunctival and intranasal infection with infectious bronchitis virus in one- and 20-day-old chickens. | three days after conjunctival and intranasal infection with ib vaccine virus a great increase in the number of plasma cells together with an increase in vascularization was observed in the stroma of the harderian gland of chickens vaccinated either at one day of age or 20 days old. from 7 days to 21 days after vaccination a pronounced formation of follicles occurred which were composed of lymphocytes. birds exposed to diluted allantoic fluid showed a limited increase of plasma cells only; follic ... | 1976 | 18777328 |
| preliminary evaluation of the haemagglutination and haemagglutination inhibition tests for avian infectious bronchitis virus. | four of the 9 strains of infectious bronchitis virus which were concentrated and treated with phospholipase c type 1 showed haemagglutination activity. these strains, holte, massachusetts 41 (m41), h120 and connecticut, were distinguishable by the haemagglutination inhibition (hi) test but showed much closer relationships than could be detected by the plaque reduction (pr) test. the four haemagglutinating strains were used to compare the hi and pr titres of 17 anti sera prepared against referenc ... | 1976 | 18777337 |
| observations on the effects of the h52 and h120 vaccine strains of infectious bronchitis virus in the domestic fowl. | the pathogenicity of h120 and h52 infectious bronchitis vaccine viruses was compared in one-day-old and 12-weeks-old chickens. both viruses produced moderate respiratory symptoms. both were also nephrotropic but whereas h52 was accompanied by gross and microscopic kidney changes, which probably accounted for the mortality which occurred, h120 produced no change in the kidney and no mortality. both viruses caused gross and microscopic changes in the bursa of fabricius. | 1976 | 18777342 |
| dropped egg production, soft shelled and shell-less eggs associated with appearance of precipitins to adenovirus in flocks of laying fowls. | two outbreaks of dropped egg production and production of soft shelled and shell-less eggs are described. the outbreaks were selected from a larger number of flocks with similar problems in the field. the drop in egg production was closely correlated with the appearance of precipitins to adenovirus in the laying birds. birds were also infected with mycoplasma synoviae. a number of other infectious causes of production problems could be excluded in these outbreaks. in particular infectious bronch ... | 1976 | 18777355 |
| local immunity in the respiratory tract of the chicken. i. transudation of circulating antibody in normal and virus-infected birds. | three-week-old chickens were given sheep erythrocytes or bovine serum albumin intravenously. seven days later their tears and saliva possessed low levels of antibody to those antigens. concurrent infection with lentogenic newcastle disease virus (ndv) caused a significant increase in transuded antibody in those fluids. in chickens with circulating antibody to ndv, induced by parenterally administered inactivated vaccine, respiratory infection with heterologous infectious bronchitis virus resulte ... | 1976 | 1027720 |
| stability of live, freeze-dried virus vaccines. | stability of live, freeze-dried vaccines is a major factor for successful vaccinations. vaccines may be stored at -20 degrees c or less for long periods without loss of activity and this storage does not affect stability during subsequent storage. storage in the refrigerator for long periods is harmless for certain very stable vaccines such as influenza, rubella, ndv, marek's. other vaccines, such as ibv, show a significant loss in titer after 2 years. the routine use of an accelerated stability ... | 1976 | 1030427 |
| morphogenesis of avian infectious bronchitis virus in primary chick kidney cells. | primary chick kidney cells were infected with avian infectious bronchitis virus (ibv) and examined by electron microscopy. virus particles entered the cells by viropexis and distinction could be made between engulfment by cell processes (phagocytosis) and entry by micropinocytosis in coated transport vesicles. virus maturation occurred by budding into either the cisternae of the endoplasmic reticulum or cytoplasmic vacuoles, and evidence was obtained to suggest that the viral surface projections ... | 1976 | 187144 |
| electron microscope observations on the entry of avian infectious bronchitis virus into susceptible cells. | infectious bronchitis virus was observed to enter cells of chicken chorioallantoic membrane by viropexis. there was no support for the suggestion that entry took place by fusion of viral and plasma membranes. the results of electron microscopy showed that virus attachment occurred both at 4 degrees and at 37 degrees c. viropexis was not observed until the preparations were warmed. similar results were obtained using chicken kidney cells. quantitative data obtained from a plaque counting system e ... | 1976 | 187152 |
| immunosuppressive effects of the infectious bursal agent and relationships to other poultry diseases. | 1976 | 220631 | |
| letter: protection by ibv vaccine. | 1976 | 181893 | |
| comparative tests on safety and potency of iba vaccines. | during a comparative test on the pathogenicity and immunogenicity of a non-adapted and an embryo-adapted ida virus, following observations were made: 1) the non-adapted virus remained pathogenic as determined by weight loss and bursal lesions. clinical signs and mortality did not occur. a change in the virulence did not occur during back passages; 2) the immunosuppressive effect of the non-adapted virus was diminished by maternal antibodies; 3) the embryo-adapted virus produced little pathogenic ... | 1976 | 182590 |
| [the influence of infectious bronchitis virus on egg production, fertility, hatchability and mortality rate in chickens (author's transl)]. | in 35 flocks comprising almost 100,000 white plymouth rock birds producing hatching eggs, infectious bronchitis (ib) caused a decline in production which appeared to be connected with the age of the birds, when the outbreak started (table i). in outbreaks of ib in pullets 3-4 weeks before they are ready to lay there is a considerable risk of delay of production and a generally too low yield (fig 1). egg laying birds, 25-34 weeks of age, suffered a drop in production from 20-80% (on an average 40 ... | 1976 | 183182 |
| isolation of infectious bronchitis virus from broiler chickens in chile. | an infectious-bronchitis-like virus was isolated from 6-week-old broiler chickens unvaccinated with infectious bronchitis virus (ibv). the isolate produced lesions in embryonating chicken eggs (ece) and clinical signs in birds characteristic of ibv. serum-neutralization and agar-gel diffusion tests demonstrated the serological relationship of this isolate to ibv. | 1976 | 183652 |
| [infectious bronchitis and colibacteriosis in chickens]. | 1976 | 194387 |