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pasteurella haemolytica septicaemia of lambs. 195514367572
bovine mastitis caused by pasteurella haemolytica: a case report. 195517648849
studies on pneumnia of cattle. i. experimental infection of calves with pasteurella haemolytica. 195617648917
a serological study of pasteurella haemolytica. 195613364743
experimental infections of pasteurella haemolytica in mice and their use in demonstrating passive immunity. 195813587712
colonial variation of pasteurella haemolytica isolated from sheep. 195813587486
[biochemical, pathogenic and immunological properties of strains of pasteurella multocida and pasteurella haemolytica]. 195813585405
the production in mice of active immunity against pasteurella haemolytica. 195913620796
isolation of two types of pasteurella haemolytica from sheep. 195913657030
a new variety of pasteurella haemolytica from the human respiratory tract. 196013713397
a strain of pasteurella haemolytica isolated from goats in uganda. 196013828612
the pathogenicity of pasteurella haemolytica for young lambs. 196013831974
two new strains of pasteurella haemolytica var. ureae isolated from the respiratory tract. 196114481991
pasteurella haemolytica var. ureae. action on blood agar and serological reactions. 196113906523
the relation of the antigenic types to the a and t types of pasteurella haemolytica. 196213868944
an unusual haemolytic effect produced by pasteurella haemolytica. 196213914237
pasteurella haemolytica var. ureae from human sputum.a new variety of pasteurella, named by henriksen and jyssum (1960, 1961) past. haemolytica var. ureae, has been isolated from the sputum of 17 patients, most of them elderly, suffering from chronic bronchitis or bronchiectasis. it has also been found in the normal respiratory tract. whether the organism aggravates the disease or acts as a mere commensal when growing in the damaged tissue is not yet clear.196214452237
interrelationships of smooth and nonsmooth variants in the dissociation of pasteurella haemolytica.wessman, g. e. (national animal disease laboratory, u.s. department of agriculture, agricultural research service, ames, iowa). interrelationships of smooth and nonsmooth variants in the dissociation of pasteurella haemolytica. j. bacteriol. 88:356-360. 1964.-smooth pasteurella haemolytica, after rapid growth in statically incubated broth cultures, decreased in numbers rapidly, and were replaced by nonsmooth variants. upon continued incubation, smooth cells again predominated. the two phenotypes ...196414203351
production of pneumonia in adult sheep with cultures of pasteurella haemolytica type-a. 196414198335
[camp test and rapid differentiation between pasteurella multocida and pasteurella haemolytica]. 196514289975
type specificity of immunity to pasteurella haemolytica infection in mice. 19655855502
cultivation of pasteurella haemolytica in a casein hydrolysate medium.the growth of pasteurella haemolytica strain h44l was studied under aerobic conditions in a medium of acid-hydrolyzed casein, supplementary cysteine, inorganic salts, vitamins, and a carbon source. the concentration of casein hydrolysate necessary for optimal growth was 1.5 or 2.0%, depending upon the carbon source employed. essential vitamins were calcium pantothenate, nicotinamide, and thiamine. concentrations as low as 0.01 mug/ml of thiamine monophosphate or thiamine pyrophosphate supported ...196516349657
epidemiological studies on pasteurella haemolytica in sheep. 19665948538
cultivation of pasteurella haemolytica in a chemically defined medium.a chemically defined medium was developed for the aerobic cultivation of pasteurella haemolytica. studies on the growth of strain h44l were conducted in a medium consisting of 15 amino acids, inorganic salts, citrate, nicotinamide, pantothenate, thiamine or thiamine monophosphate, and carbon sources. the amino acids were provided as l isomers, because racemic mixtures of some amino acids inhibited growth. the carbon source consisted of a mixture of 1.0% d-galactose and 0.1% d-glucose. culture po ...19665955799
pasteurellosis in kenya goats due to pasteurella haemolytica. 19675624115
experimental infection of calves with myxovirus parainfluenza-3 and pasteurella haemolytica. 19674294767
nucleic acid homologies between the a and t types of pasteurella haemolytica. 19685748361
characterization of pasteurella hemolytica isolated from the respiratory tract of cattle.morphological, cultural, biochemical, and serological characteristics of 43 strains of pasteurella hemolytica isolated from the respiratory tract of cattle, including 37 that had shipping fever, were determined. with one exception, all strains satisfied the major criteria for differentiation of the species from p. multocida - hemolysis on blood agar, absence of indole production, and growth on macconkey's agar. many strain variations in fermentative capacity were noted, although other biochemica ...196815846901
[enzootic in chicken due to pasteurella haemolytica]. 19695813307
[comparative study of species actinobacillus lignieresii and pasteurella haemolytica. i. actinobacillus lignieresii brumpt, 1910; emend]. 19695386533
[development and testing of a combined vaccine against parainfluenza 3, mucosal disease and pasteurella haemolytica infection in cattle]. 19694309171
[comparative study of species actinobacillus lignieresii and pasteurella haemolytica. ii. pasteurella haemolytica newsom and cross, 1932]. 19695379829
[comparative study of the species actinobacillus lignieresii and pasteurella haemolytica. 3. actinobacillus haemolyticus]. 19695379830
biochemical reactions of different serotypes of pasteurella haemolytica. 19705452466
an outbreak of highly fatal pneumonia in kids due to pasteurella haemolytica. 19705530303
a study of untypable strains of pasteurella haemolytica. 19705531123
variation in carrier rates of pasteurella haemolytica in sheep flocks. i. normal flocks. 19705531124
chemically defined media for pasteurella multocida and pasteurella ureae, and a comparison of their thiamine requirements with those of pasteurella haemolytica. 19704249479
studies on the carriage of pasteurella haemolytica in lambs. 19705461441
the immunogenicity of some experimental parainfluenza 3-bvd-pasteurella haemolytica vaccines in calves and mice. 19705516858
the incidence and trends of parainfluenza 3, bovine viral diarrhoea, and pasteurella haemolytica antibody titers in the serum of young cattle in the netherlands. 19704325594
pasteurella haemolytica of cattle: serotype, production of beta-galactosidase and antibacterial sensitivity.two hundred and three isolates of pasteurella haemolytica from cattle were studied. they originated from the nasal cavity of cattle in housed herds; the nasal cavity and pneumonic lungs of experimental feedlot calves and from pneumonic bovine lungs submitted for bacteriological diagnosis.to determine whether a single characteristic or combination of characteristics might be a feature of isolates collected from animals with pneumonic pasteurellosis (shipping fever), the following tests were made. ...19714260945
regional histological variations of the nasal mucosa of cattle.aspects of the histology of the nasal mucosa of calves from four to six months of age have been described. the functional significance of the type of epithelium, its thickness, the degree of neutrophil invasion, and its relationship to the numbers of pasteurella haemolytica in the nasal cavity have been discussed. in addition, the arrangement and depth of glands in the lamina propria and the presence of lymph follicles have been described.19714254895
serotypes of pasteurella haemolytica isolated from calves. 19715145206
isolation of pasteurella haemolytica from arthritis in a calf. 19715173678
pasteurella haemolytica in the tracheal air of calves.pasteurella haemolytica was shown to be present in the tracheal air of calves and was likely transported in droplet nuclei formed in the nasal passages. the number of colonies of p. haemolytica found in the tracheal air of the calves ranged from 1.9 to 12.5 colonies per cu ft of air. as long as p. haemolytica colonized the nasal passage in numbers detectable in nasal swabs it could be found in the tracheal air but there was no direct correlation between the numbers in the nasal flora and the num ...19714253460
wide distribution of pasteurella haemolytica type 1 over the nasal mucosa of cattle.studies on the site of proliferation of pasteurella haemolytica in the bovine nasal cavity have been carried out.p.haemolytica were isolated from 15 selected major anatomical areas of the nasal cavity in calves with high numbers of p.haemolytica following shipment from western canada. when the organisms were present in the nasal cavity of live animals in low numbers, they were isolated from many, but not all, areas. p.haemolytica was isolated post mortem from one or more selected areas of severa ...19714254890
experimental pneumonia of sheep. clinical, microbiological and pathological responses to infection with myxovirus parainfluenzae 3 and pasteurella haemolytica. 19714327651
variation in carrier rates of pasteurella haemolytica in sheep. ii. diseased flocks. 19725062917
the pulmonary clearance of bacteria by calves and mice.using a modified aerosol generator, white mice and calves were exposed to aerosols of viable staphylococcus aureus and pasteurella haemolytica and the clearance of the inhaled organisms by the lungs of the experimental animals was measured. fifty-seven percent of inhaled s. aureus were cleared in two hours by the mouse lungs, 79% were cleared in four hours and 93% were cleared in eight hours. fifty-six percent of inhaled p. haemolytica were cleared in two hours by the mouse lungs, 76% were clear ...19724259926
an epidemiological study of pasteurella haemolytica in calves. 19734731569
serological types of pasteurella haemolytica isolates from sheep and goats in the somali democratic republic. 19744460316
pasteurella haemolytica associated with pneumonia in a foal. a case report. 19744414992
the recovery of pasteurella haemolytica from the tonsils of adult sheep. 19744445591
[nitrofurantoin-test for the differentiation of bordetella bronchiseptica (author's transl)].bordetella bronchiseptica is primarily resistant against nitrofurantoin (mic greater than 200 mug/ml), and this feature can be used for the differentiation of the organism from other gram-negative coccobacteria. nitrofurantoin paper disks (300 mug) failed to affect the growth of 150 strains of b. bronchiseptica isolated from different animal hosts, but they produced marked inhibition zones in the cultures of the followingspecies: pasteurella multocida, pasteurella pneumotropica, pasteurella haem ...1975809944
[serologic typing of strains of pasteurella haemolytica isolated from sheep].typed were a total of 85 strains of pasteurella haemolytica isolated from lambs, weaned lambs, and adult sheep in cases of septicemia and broncho-pneumonia applying the hemagglutination-inhibition reaction and making use of capsule antigens and anti-capsule hyperimmune sera. it was found that 74 strains belong to biotype a, five belong to biotype t, and six remained untyped. most wide spread in this country proved serotype a2--35 strains, followed by serotype a6--14 strains.19751226701
experimental infection of lambs with an aerosol of pasteurella haemolytica.specific pathogen free lambs were exposed to an aerosol of pasteurella haemolytica. ten lambs vaccinated with an adjuvanted killed p haemolytica vaccine and nine units of p haemolytica administered in an aerosol. pneumonia histologically indistinguishable from natural pneumonic pasteurellosis occurred in one vaccinated lamb and in four control lambs.19751144931
protein electrophoretic pattern of pasteurella haemolytica.electrophoresis in polyacrylamide gels of the constituent proteins of the 12 serotypes and an untypable strain of pasteurella haemolytica showed a pattern of bands that divided the group into two. this division conformed to the a and t biotype groupings of smith (1959) although the serotype a9 showed only minor band difference from the three t serotypes 3, 4 and 10. it was not possible by this method to separate all the type strains from each other by the specific recognition of the patterns of ...19751144932
nonspecific immunosuppression induced in mice with killed pasteurella haemolytica in freund's complete adjuvant.killed pasteurella haemolytica type i in combination with freund's complete adjuvant, induced suppression of murine primary response to srbc. the suppression could be adoptively transferred with spleen cells depleted of t or b lymphocytes and was best expressed when viable cells were transferred. some normal rabbit serum has the ability to nullify immunosuppressive effects of the transferred cells.1976773844
multiple drug resistance in pasteurella multocida and pasteurella haemolytica from cattle and swine.the results of antimicrobial susceptibility testing on 262 strains of pasteurella multocida and 141 strains of pasteurella haemolytica isolated from cattle and swine from 1971 to 1974 were analyzed for patterns of resistance to streptomycin, penicillin, tetracycline, and chloramphenicol, using a modified kirby-bauer procedure. resistance was recorded for 80.5% of the isolants of p multocida and 92.2% of those of p haemolytica. resistance to streptomycin was most frequent, followed by resistance ...19761048955
[biochemical properties of different serotypes of pasteurella haemolytica].studied were the morphologic and biochemic properties of 85 pasteurella haemolytica strains belonging to the known 12 serotypes after biberstein, gills (2). the biochemical properties of the strains were studied after the pattern of bosworth and lovell (4) with regard to arabinose, trehalose, xylose, manose, salysin, and lactose. it was found that the biochemical properties correlated with the biotype classification of the strains. thus, the biochemical reaction with trehalose and arabinose may ...1976960554
the effect of route of immunization on the lapine immune response to killed pasteurella haemolytica and the influence of aerosol challenge with the live organism.appearance of anti-pasteurella haemolytica antibody in the serum and broncho-alveolar washings of rabbits is independent of the route of immunization and is similar in both locations. the most influential factor in development of a humoral response is exposure to live p. haemolytica and prior exposure to the killed bacterium has no significant effect upon titre determined following aerosol challenge with live organisms.19761000399
demonstration of cross-protection between pasteurella multocida type a and pasteurella haemolytica, serotype 1.mice immunized with the potassium thiocyanate extract of pasteurella haemolytica, serotype 1, were found to resist a challenge infection of p. multocida type a, thus demonstrating cross-protection. this finding was further supported by the finding that an antiserum directed against the potassium thiocyanate extract of p. haemolytica was bactericidal to p. multocida and vice versa.1977591058
concurrent infection of lambs with parainfluenza virus type 3 and pasteurella haemolytica. 1977208027
[problems in the use of radioactively marked bacteria in animal experiments. 1. labeling of pasteurella multocida, pasteurella haemolytica and salmonella dublin with eh, 14c, 32p, 59fe, 99mtc, 125j1].several methods are suggested by which to use the radionuclides 3h, 14c, 32p, 59fe, 99mtc, and 125j for labelling or doublelabelling of pasteurella multocida, pasteurella haemolytica, and salmonella dublin, with particular reference being made to labelling ofr animal experiments. suitable radioactive substrates for internal labelling in chemically defined or partially defined nutritive media include 3h-thymin, 3h-thymidine, 14c-glucose, 14c-mannose, 14c-aspartic acid, as well as 3h-uracil, 3h-ur ...1977849104
serotypes of pasteurella haemolytica in ovine pasteurellosis.the serotypes of 406 strains of pasteurella haemolytica were determined. these came from cases of pasteurellosis in sheep of all ages. serotype a2 was the most frequent and comprised 33 per cent of all strains recovered. serotypes t3, t4 and t10 comprised 16, 14 and 12 per cent of the total respectively. serotypes a1 and a6 contributed 5 per cent each, a7, 18, a9, a11 and a12 a total of 8 per cent collectively, serotype a5 was not isolated at all while 6 per cent of strains were serologically un ...1977841198
bovine pneumonic pasteurellosis: experimental induction in vaccinated and nonvaccinated calves.a study was undertaken to investigate the effects of the immune response induced by combined aerosol and parenteral vaccination on the lung lesions induced in calves by pasteurella haemolytica ai. twenty-four calves, twelve of which had been vaccinated with killed p. haemolytica by aerosol and subcutaneous injection in freund's complete and incomplete adjuvant were challenged by intratracheal inoculation of live p. haemolytica. serological response to vaccination was not marked but was best meas ...1977832192
pasteurella haemolytica infection in two neonatal foals. 1977869809
[chemically defined and partially defined media for pasteurella multocida and pateurella hemolytica].two culturing recipes were suggested for pasteurella multocida and pasteurella haemolytica, one partialy defined nutritive defined nutritive medium with 0.5 per cent yeast extract and one chemically defined medium. both had been composed on the basis of studies into nutrient demand and into the effects of complex nutritive substrates. both nutritive media are applicable also to culturing other bacterial species. (among the strains tested so far were streptococci, staphylococci, escherichia coli, ...1977322633
incidence of pasteurella haemolytica in the respiratory tract of apparently healthy chickens and chickens with infectious bronchitis. characterisation of 213 strains.the tracheal flora of healthy chickens consisted mainly of gram-positive microorganisms. a shift to a predominantly gram-negative flora, mainly due to escherichia, was observed in chickens with respiratory symptoms caused by infectious bronchitis. most of the chickens in which e. coli formed a predominant part of the tracheal flora also showed a positive serological reaction to mycoplasma gallisepticum. a raised incidence of pasteurella haemolytica with increase in age was noted both with regard ...197718770338
induction of pneumonia in mice with pasteurella haemolytica. 1978670447
serological types of pasteurella haemolytica in kenya.the 12 known serotypes of p. haemolytica and two biotypes a and t were found to occur in kenya. biotype t was more common in disease conditions than biotype a, which was more common in the nasal passages of healthy animals. only biotypes a strains were recovered from cattle and the majority were serotypes 1 and 2, but serotypes 4 and 11 were also isolated. all serotypes were found to occur in sheep and goats, but serotypes 3, 4, 6, 8 and 10 were more commonly associated with pneumonia. it was ob ...1978618717
the effect of vaccination with a parainfluenza type 3 virus on pneumonia resulting from infection with parainfluenza type 3 virus and pasteurella haemolytica. 1978207750
experimental infection of specific pathogen-free lambs with parainfluenza virus type 3 and pasteurella haemolytica. 1978207749
rapid plate agglutination procedure for serotyping pasteurella haemolytica.a specific, rapid plate agglutination procedure for serotyping pasteurella haemolytica was performed. the procedure did not require special antigen preparation and yielded essentially the same results as the indirect hemagglutination procedure.1978632345
[respiratory enzootics in sheep caused by pasteurella haemolytica].bacteriologically in 25 per cent of the materials taken from lambs, weaned lambs, and adult sheep pasteurella haemolytica was invariably isolated. serologic typing revealed that serotypes a2 and a6 were mostly widespread. the remaining serotypes proved to be encountered. widely occurring were likewise the carriers of pasteurella haemolytica both among the diseased animals and among the normal contacts--30 and 6 per cent, respectively. the serotype of the isolated strains (swab samples) was shown ...1978749330
the bovine alveolar macrophage. ii. in vitro studies with pasteurella haemolytica.bovine alveolar macrophages were cultured in vitro and challenged with suspensions of live and dead bacteria. these cells showed severe cytotoxic morphological changes and a low rate of phagocytosis after exposure to live pasteurella haemolytica type i was readily phagocytosed and produced only mild cytotoxic changes.1978688077
pneumonia in calves produced with aerosols of bovine herpesvirus 1 and pasteurella haemolytica.in each of 11 experiments, four calves were exposed first to an aerosol of bovine herpesvirus 1 (bhv1, virus of infectious bovine rhinotracheitis) and second to an aerosol of pasteurella haemolytica. the interval between aerosols was three to five days. in two other experiments, calves were exposed only to a bacterial aerosol. climate was controlled for all experiments from the day of viral exposure and for eight of the experiments it was also controlled for four to six days before the first aer ...1978210912
pathological and microbiological studies on calf pneumonia occurring in mass rearing facilities.pathological and microbiological studies were conducted on lesions in the lungs of 194 calves from mass rearing facilities. macroscopically, the lesions were classified into six forms: nonlesion, atelectasis, mild pneumonia, moderate pneumonia, advanced pneumonia, and advanced pneumonia accompanied with abscess. histopathological examination revealed bronchopneumonia in most of the calves. lesions more advanced than moderate pneumonia were complicated with desquamation, severe exudation, and nec ...1979522891
antimicrobial susceptibility patterns of the a and t types of pasteurella haemolytica.minimal concentrations of penicillin, ampicillin, cephalothin, chloramphenicol, tetracycline, erythromycin, nitrofurantoin, kanamycin and gentamicin inhibitory to pasteurella haemolytica biotypes a and t were determined. they were found to be significantly higher for t than for a type strains in the case of all the antimicrobial drugs tested except the two aminoglycosides kanamycin and gentamicin, for which no differences were observed. in the case of penicillin the differences were so marked th ...1979515520
experimental bovine pneumonic pasteurellosis. ii. genesis and prevention.two experiments were conducted. in the first, 16 crossbred hereford calves were divided into two equal groups. the first group was vaccinated intranasally with a commercial vaccine against bovid herpesvirus 1 and the second group was unvaccinated. the calves were later exposed to an aerosol of bovid herpesvirus 1 (strain 108) for five minutes. four calves from each group were subjected to transportation and four calves from each group were kept in an environmental chamber for four days. four day ...1979487248
experimental bovine pneumonic pasteurellosis. i. prevention of the disease.fifteen three- to six-month old hereford-cross calves were divided into three groups. the first group was inoculated with bovid herpersvirus 1 (strain 108), the second with a commercial intranasal vaccine against bovid herpesvirus 1 and the third group acted as controls. at least three weeks after vaccination, all calves were weaned, placed in an environmental chamber at 25.0 degrees c (days) and -13.3 degrees c (nights) and challenged with an aerosol of bovid herpesvirus 1 followed four days la ...1979487247
two new serotypes of pasteurella haemolytica from sheep in ethiopia. 1979442208
non-specific resistance of mice to pasteurella haemolytica.a technique for challenge infection of mice with pasteurella haemolytica is described. mice were challenged intraperitoneally with p haemolytica in gastric mucin, and viable counts were performed 6 h later on liver suspensions. viable counts of p haemolytica in the livers of unvaccinated control mice had increased 6 h after infection. mice were injected subcutaneously with a commercial pasteurella vaccine at various time intervals before challenge. in those given vaccine two weeks, one week, 48 ...1979396619
experimental studies of chronic pneumonia of sheep.strains of mycoplasma ovipneumoniae and pasteurella haemolytica isolated from sheep affected with chronic pneumonia were inoculated by endobronchial route to conventionally-reared and spf (specific pathogen-free) lambs. changes resembling those of the naturally-occurring disease were produced in most lambs given the organisms in combination and in some given m. ovipneumoniae alone. similar but less extensive changes were seen in spf lambs and fewer animals were affected. different strains of m. ...1979318238
differentiation of pasteurella haemolytica biotypes a and t with growth inhibitors.differentiation of type a and type t cultures of pasteurella haemolytica was accomplished by paper disks containing 0.3 microgram of penicillin g, which produced zones of inhibition larger than 10 mm with type a but not with type t strains. basic fuchsin (0.2 microgram/ml), brilliant green (0.005 microgram/ml), methylene blue (3.1 micrograms/ml) in brain heart infusion broth permitted the growth of type t but that of type a isolates.1979259607
pathology of an experimental infection of specific pathogen-free lambs with parainfluenza virus type 3 and pasteurella haemolytica. 1979231053
a field outbreak of suspected stachybotryotoxicosis in sheep.an outbreak of mortality in a flock of mutton merino sheep in which 109 out of 568 sheep died in the south-western cape province, is described. it was characterized by haemorrhagic septicaemia, anaemia, leucocytopaenia and haemorrhagic tendencies. mortalities followed unseasonal and heavy summer rain, extended over a period of 6 months and were associated with the uninterrupted consumption of sheep cubes processed on the farm severly fungus-infested wheat, barley and rye straw for a period of at ...1979575906
sequential titration of bovine lung and serum antibodies after parenteral or pulmonary inoculation with pasteurella haemolytica.calves were vaccinated by intrabronchial or subcutaneous injection of formalinized pasteurella haemolytica. antibody in serum, nasal washings, and bronchoalveolar washings was titrated sequentially before and after calves were vaccinated and then challenge exposed with live homologous bacteria. bronchoalveolar washings were collected by fiberoptics bronchoscopy, and antibody was titrated by indirect (antiglobulin) bacterial agglutination. responsiveness to vaccination was related in initial seru ...1979525887
a serological comparison of pasteurella haemolytica vaccines containing different adjuvants.five adjuvants were compared for their ability to enhance the serological response of sheep to capsule extract of pasteurella haemolytica biotype a serotype 6. vaccines of this antigen were inoculated with incomplete freund's adjuvant, complete freund's adjuvant, incomplete freund's adjuvant containing a water soluble extract of mycobacterium tuberculosis, aluminium hydroxide gel or a combination of aluminium hydroxide gel and incomplete freund's adjuvant. this latter vaccine induced significant ...1979523817
a mouse model of pasteurella haemolytica infection and its use in assessment of the efficacy of p haemolytica vaccines.a method for infecting mice with pasteurella haemolytica is described. mice were inoculated intraperitoneally with p haemolytica incorporated in gastric mucin, killed at various time intervals thereafter and viable counts of bacteria were performed on liver suspensions. p haemolytica grew at an exponential rate in the livers of normal mice. mice vaccinated against p haemolytica a1 were protected against homologous challenge and viable counts decreased rapidly in their livers. mice given trivalen ...1979523808
pasteurella haemolytica and respiratory disease in cattle. 1979400027
improved method for obtaining streptomycin-dependent mutants from pasteurella multocida and pasteurella haemolytica, using n-methyl-n'-nitro-n-nitrosoguanidine.n-methyl-n'-nitro-n-nitrosoguanidine was used in a modified and improved procedure to obtain streptomycin-dependent mutants of type a pasteurella multocida and type 1 pasteurella haemolytica. the relative virulence of these mutants was determined by mouse inoculation with and without streptomycin.1979475104
[deoxyribonucleic acids from pasteurella multocida and pasteurella haemolytica].pasteurella multocida and p. haemolytica strains contain between 1.5 and three per cent phosphorus, between nine and 14 per cent nitrogen, between two and four per cent dna, and between five and 18 per cent rna, the precise figures depending on culturing conditions. high-molecular dna may be isolated by means of bacteriolysis, using deoxycholate or dodecylsulphate and the usual steps of purification, with yield and purity differing by strains. dna with sufficient purity can be obtained from seph ...197993955
inability of passively acquired antibody to protect lambs against experimental pasteurellosis.an experimental model of pneumonic pasteurellosis in sheep was used to investigate the role of serum antibody in resistance to this disease. lambs which had been vaccinated with a sodium salicylate extract of pasteurella haemolytica type a1 were protected against challenge with pi3 virus followed by p. haemolytica type a1 7 days later. the majority of untreated lambs and lambs which had received either 200 ml of antiserum to p. haemolytica or 200 ml of control serum intraperitoneally 18 h before ...1979227797
the effect of vaccination of lambs with live parainfluenza virus type 3 on pneumonia produced by parainfluenza virus type 3 and pasteurella haemolytica. 19806258113
evidence of cytocidal effects of pasteurella haemolytica on bovine peripheral blood mononuclear leukocytes.pasteurella haemolytica had a pronounced cytocidal effect on bovine mononuclear leukocytes. mononuclear leukocytes separated from venous blood on ficoll-diatrizoate and incubated with either p haemolytica or escherichia coli showed a significantly greater percentage cell death than did cells incubated with staphylococcus epidermidis or controls. neither heat-killed nor x-irradiated p haemolytica caused a significant percentage cell death. the cytotoxic potential of p haemolytica was dose related ...19807013577
the possible role of respiratory syncytial virus and pasteurella spp in calf respiratory disease.in a natural outbreak of respiratory disease during 1976, 31 of 43 calves showed moderately severe clinical signs which included pyrexia (maximum 42 degrees c) and tachypnoea. during the outbreak infection by respiratory syncytial virus (rsv) was demonstrated by isolation from nasopharyngeal swabs or by serology. pasteurella haemolytica or p multocida were isolated from the blood of four and five calves respectively. in the month before disease 65 per cent of the calves showed significant antibo ...19807210428
response of calves to lung challenge exposure with pasteurella haemolytica after parenteral or pulmonary immunization.in 3 experiments, calves were vaccinated by intrabronchial or subcutaneous injection of formalinized pasteurella haemolytica. immunization was evaluated by assessing the clinical and pathologic responses to pulmonary challenge exposure with live homologous bacteria. serum and bronchoalveolar washings were titrated for antibody by indirect (antiglobulin) bacterial agglutination. response to challenge exposure was determined by increased rectal temperature and faster respiratory rate. in all exper ...19807212406
demonstration of an r plasmid in a strain of pasteurella haemolytica isolated from feedlot cattle.a strain of pasteurella haemolytica isolated from the lungs of feedlot cattle with pneumonia was shown to be resistant to ampicillin, tetracycline, and streptomycin. two small, nontransmissible plasmids were shown to be responsible, for tetracycline resistance, a 5.7 x 10(6) dalton plasmid, and for streptomycin resistance, a 5.5 x 10(6) dalton plasmid. ampicillin resistance passed by transformation to escherichia coli could not be shown conclusively to be on a plasmid. ampicillin resistance was ...19806989297
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