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Contents of veterinary microbiology, volume 47
veterinary microbiology ELSEVIER
VeterinaryMicrobiology47 ( 1995) 421-423
Contents of Veterinary Microbiology, Volume 47 VOL. 47 NOS. l-2
NOVEMBER 1995
Isolation and identification of fimbriae and toxin production by Escherichia coli strains from cows with clinical mastitis L.J.A. Lipman, A.d. Nijs and W. Gaastra (Utrecht, The Netherlands) . . . . . . . . . . . . . . . . . Plasmid profiles of Klebsiella pneurrwniae isolated from bovine mastitis N. Kikuchi, C. Kagota, T. Nomura, T. Hiramune, T. Takahashi and R. Yanagawa (Ebetsu, Hokkaido, Japan) . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . Toxigenic Escherichia coli in Spanish piggeries from 1986 to 1991 J.I. Garabal, E.A. Gonzalez, F. Vasquez, J. Blanc0 and M. Blanc0 (Lugo, Spain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aerosol exposure of pigs to viable or inactivated actinobacillus pleuropneumoniae serotype 9 induces antibodies in bronchoalveolar lining fluids and serum, and protects against homologous challenge A. Hensel (Vienna, Austria), N. Stockhofe-Zurwieden, M. Ganter (Hannover, Germany) and K. Petzoldt (Vienna, Austria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Influence of inoculation route on the carrier state of Salmonella choleruesuis in swine J.T. Gray, P.J. Fedorka-Cray, T.J. Stabel and M.R. Ackermann (Ames, IA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Detection of Pseudomonas aeruginosa from ovine fleece washings by PCR amplification of 16s ribosomal RNA N.M. Kingsford and H.W. Raadsma (Camden, N.S.W., Australia) . . . . . . . . . . . . . . . . . . . . Experimental infection with Yersiniu enterocolitica serovar 0:8 in Beagle dogs H. Hayashidani, K. Kaneko, K. Sakurai and M. Ogawa (Tokyo, Japan) . . . . . . . . . . . . . . Comparison of the Resistance of C57BL/6 and C3H/He Mice to Infection with
1 9 17
27
43 61 71
Mycobacterium paratuberculosis
R.S. Veazey, D.W. Horohov, J.L. Krahenbuhl, H.W. Taylor, J.L. Oliver III and T.G. Snider III (Louisiana, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Genetic characterization of mycobacteria from South American wild seals M.I. Romano, A. Alito, F. Bigi, J.C. Fisanotti and A. Cataldi (Buenos Aires, Argentina) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stages of Marek’s disease virus latency defined by variable sensitivity to interferon modulation of viral antigen expression L.M. Volpini, B.W. Calnek (Ithaca, NY, USA), M.J. Sekellick and P.I. Marcus (Storm, CT, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Differentiation of classical swine fever virus (CSFV) strains using monoclonal antibodies against structural glycoproteins A. Kosmidou, R. Ahl, H.-J. Thie and E. Weiland (Tiibingen, Germany) . . . . . . . . . . . . . Immune responses of the camel (Camelus dromedarius) to contagious ecthyma (or-f) virus infection S.M. Azwai, S.D. Carter and Z. Woldehiwet (Liverpool, UK) . . . . . . . . . . . . . . . . . . . . . . . . . .
79 89
99 111 119
422
Contents Volume 47/ Veterinary Microbiology 47 (1995) 421423
African horse sickness and African carnivores K.A. Alexander, P.W. Kat (Davis, CA, USA), J. House, C. House (Greenport, NY, USA), S.J. O’Brien (Frederick, MD, USA), M.K. Laurenson (Invernessshire, United Kingdom), J.W. McNutt and B.I. Osburn (Davis, CA, USA) 133 Mechanisms for persistence of acute and chronic feline calicivirus (FCV) infections in the face of vaccination N.C. Pedersen and K. Floyd Hawkins (Davis, CA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Serologic comparison of four isolates of rabbit hemorrhagic disease virus M.L. Beminger and C. House (Greenport, NY, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Identification of a region of the Alcelaphine Herpesvirus- 1 genome associated with virulence for rabbits J.A. Handley, D.R. Sargan, A.J. Herring and H.W. Reid (Edinburgh, UK) . . . . . . . . . . 167 In vitro amplification of the 16s rRNA genes from Mycoplasma bovis and Mycoplasma agalactiae by PCR Y.R. Chavez Gonzalez (La Habana, Cuba), C.R. Bascuilana, G. Btilske, J.G. Mattsson (Uppsala, Sweden), C.F. Molina (La Habana, Cuba) and K.E. Johansson (Uppsala, Sweden) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Development and evaluation of a selective and indicative medium for isolation of Actinobacillus pleuropneumoniae from tonsils M.J. Jacobsen and J.P. Nielsen (Copenhagen, Denmark) . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . 191 Analyses of restriction fragment patterns (RFPs) and pathogenicity in baby mice of equine herpesvirus 1 and 4 (EHV- 1 and EHV-4) strains circulating in Danish horses V. Palfi and L.S. Christensen (Copenhagen, Denmark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 VOL. 47 NOS. 3-4
1995
The serological response to Salmonella serovars typhimurium and infantis in experimentally infected pigs. The time course followed with an indirect anti-LPS ELISA and bacteriological examinations B. Nielsen, D. Baggesen, F. Bager, J. Haugegaard and P. Lind (Copenhagen, Denmark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 Susceptibility to Actinobacillus pleuropneunwniae infection in pigs from an endemically infected herd is related to the presence of toxin-neutralizing antibodies T. Cruijsen, L.A.M.G. Van Leengoed (Utrecht, The Netherlands), E.M. Kamp, A. Bartelse, A. Korevaar (City AB Lelystad, The Netherlands) and J.H.M. Verheijden (Utrecht, The Netherlands) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 Aerobactin production by enterotoxigenic Escherichia coli of porcine intestine S. Suarez, C. Celemin, E. Zduficzyr, E. Medina (Le6n, Spain) and P.H. Williams (Leicester, UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 The prevalence of F107 fimbriae and their association with Shiga-like toxin II in Escherichia coli strains from weaned Australian pigs E.J. Hide, I.D. Connaughton, S.J. Driesen, D. Hasse, R.P. Monckton and N.G. Sammons (Bendigo, Australia) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 235 Chlamydia psittaci in turkeys: pathogenesis of infections in avian serovars A, B and D D. Vanrompay (Gent, Belgium), J. Mast (K. Mercierlaan Heverlee, Belgium), R. Ducatelle, F. Haesebrouck (Gent, Belgium) and B. Goddeeris (K. Mercierlaan Heverlee, Belgium) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 245 Serological crossreactivity between Brucella abortus and Yersinia enterocolitica 0:9 I Immunoblot analysis of the antibody response to Brucella protein antigens
Contents Volume 471 Veterinary Microbiology
47 (1995) 421423
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in bovine brucellosis R. Kittelberger, F. Hilbink, M.F. Hansen, M. Penrose (Box Upper Hutt, New Zealand), G.W. De Lisle (Upper Hutt, New Zealand), J.-J. Letesson (Namur, Belgium), B. Garin-Bastuji (Maisons-Alford, France), J. Searson (Wagga Wagga, Australia), C.A. Fossati (Buenos Aires, Argentina), A. Cloeckaert (Nouzilly, France) and G. Schurig (VA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257 Serological crossreactivity between Brucella abortus and Yersinia enterocolitica 0:9 II The use of Yersinia outer proteins for the specific detection of Yersinia enterocolitica infections in ruminants R. Kittelberger, F. Hilbink, M.F. Hansen, G.P. Ross, M.A. Joyce (Upper Hutt, New Zealand), S. Fenwick (Palmerston North, New Zealand), J. Heesemann (Wiirzburg, ,__ - Germany), . . H. Wolf-Watz (Umeb, Sweden) and K. Nielsen (Nepean, Writ., Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271 Phenotypic characterisation of Pasteurella multocida isolates from Australian poultry N. Fegan, P.J. Blackall and J.L. Pahoff (Yeerongpilly Qld., Australia) . . .. . . .. . .. . . . . 281 Influence of chondroitinase on indirect hemagglutination titers and phagocytosis of Pasteurella multocida serogroups A, D and F R.B. Rimler, K.B. Register (Ames, Iowa, USA), T. Magyar (Budapest, Hungary) and M.R. Ackermann (Ames, Iowa, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 Antimicrobial activity of chicken and turkey heterophil peptides CHPl, CHP2, THPl , and THP3 E.W. Evans, F. Gwen Beach, K.M. Moore, M.W. Jackwood, J.R. Glisson and B.G. Harmon (Athens, GA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 Molecular epidemiology of Mycoplasma mycoides subsp. mycoides biotype Small Colony, the agent of contagious bovine pleuropneumonia F. Poumarat and M. Solsona (Lyon, France) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 Six antigenic groups within the genus pestivirus as identified by cross neutralization assays A. Dekker, G. Wensvoort and C. Terpstra (Lelystad, The Netherlands) . . . . . . . . . . . . . . 3 17 Development of a simple, rapid and accurate in vitro whole blood technique for the detection and semi-quantification of FIV cellular viremia A.L. Guiot, D. Rigal, D. Pialot and G. Chappuis (Lyon, France) . . . . . . . . . . . . . . . . . . _. . . 33 1 Spiroc,hetes isolated from dairy cattle with papillomatous digital dermatitis and interdigital dermatitis R.L. Walker, D.H. Read, K.J. Loretz and R.W. Nordhausen (Davis, CA, USA) . . . 343 Apoptosis in chicken embryo fibroblasts caused by Newcastle disease virus K.M. Lam (Davis, CA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357 Differentiation of African horse sickness viruses by polymerase chain reaction and segments 10 restriction patterns S. Zientara, C. Sailleau, S. Moulay and C. Cruciere (Maisons-Alfort, France) . . . . . . 365 Diagnosis of fetal infection with porcine parvovirus by in situ hybridization A.S. Waldvogel, S. Broll, M. Rosskopf, M. Schwyzer and A. Pospischil (Zurich, Switzerland) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377 Detection of ileal symbiont intracellularis in porcine faecal samples by polymerase chain reaction B.M. MC Cormick, D. Hasse and R.P. Monckton (Bendigo, Australia) . . . . . . . . . . . . . . . 387 Cytocidal infection of hog cholera virus in porcine bone marrow stroma cell cultures M. Shimizu, S. Yamada and T. Nishimori (Tsukuba, Ibaraki, Japan) . . . . . . . . . . . . . . . . . . 395
VeterinaryMicrobiology47 ( 1995) 421-423
Contents of Veterinary Microbiology, Volume 47 VOL. 47 NOS. l-2
NOVEMBER 1995
Isolation and identification of fimbriae and toxin production by Escherichia coli strains from cows with clinical mastitis L.J.A. Lipman, A.d. Nijs and W. Gaastra (Utrecht, The Netherlands) . . . . . . . . . . . . . . . . . Plasmid profiles of Klebsiella pneurrwniae isolated from bovine mastitis N. Kikuchi, C. Kagota, T. Nomura, T. Hiramune, T. Takahashi and R. Yanagawa (Ebetsu, Hokkaido, Japan) . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . Toxigenic Escherichia coli in Spanish piggeries from 1986 to 1991 J.I. Garabal, E.A. Gonzalez, F. Vasquez, J. Blanc0 and M. Blanc0 (Lugo, Spain) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aerosol exposure of pigs to viable or inactivated actinobacillus pleuropneumoniae serotype 9 induces antibodies in bronchoalveolar lining fluids and serum, and protects against homologous challenge A. Hensel (Vienna, Austria), N. Stockhofe-Zurwieden, M. Ganter (Hannover, Germany) and K. Petzoldt (Vienna, Austria) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Influence of inoculation route on the carrier state of Salmonella choleruesuis in swine J.T. Gray, P.J. Fedorka-Cray, T.J. Stabel and M.R. Ackermann (Ames, IA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Detection of Pseudomonas aeruginosa from ovine fleece washings by PCR amplification of 16s ribosomal RNA N.M. Kingsford and H.W. Raadsma (Camden, N.S.W., Australia) . . . . . . . . . . . . . . . . . . . . Experimental infection with Yersiniu enterocolitica serovar 0:8 in Beagle dogs H. Hayashidani, K. Kaneko, K. Sakurai and M. Ogawa (Tokyo, Japan) . . . . . . . . . . . . . . Comparison of the Resistance of C57BL/6 and C3H/He Mice to Infection with
1 9 17
27
43 61 71
Mycobacterium paratuberculosis
R.S. Veazey, D.W. Horohov, J.L. Krahenbuhl, H.W. Taylor, J.L. Oliver III and T.G. Snider III (Louisiana, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Genetic characterization of mycobacteria from South American wild seals M.I. Romano, A. Alito, F. Bigi, J.C. Fisanotti and A. Cataldi (Buenos Aires, Argentina) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Stages of Marek’s disease virus latency defined by variable sensitivity to interferon modulation of viral antigen expression L.M. Volpini, B.W. Calnek (Ithaca, NY, USA), M.J. Sekellick and P.I. Marcus (Storm, CT, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Differentiation of classical swine fever virus (CSFV) strains using monoclonal antibodies against structural glycoproteins A. Kosmidou, R. Ahl, H.-J. Thie and E. Weiland (Tiibingen, Germany) . . . . . . . . . . . . . Immune responses of the camel (Camelus dromedarius) to contagious ecthyma (or-f) virus infection S.M. Azwai, S.D. Carter and Z. Woldehiwet (Liverpool, UK) . . . . . . . . . . . . . . . . . . . . . . . . . .
79 89
99 111 119
422
Contents Volume 47/ Veterinary Microbiology 47 (1995) 421423
African horse sickness and African carnivores K.A. Alexander, P.W. Kat (Davis, CA, USA), J. House, C. House (Greenport, NY, USA), S.J. O’Brien (Frederick, MD, USA), M.K. Laurenson (Invernessshire, United Kingdom), J.W. McNutt and B.I. Osburn (Davis, CA, USA) 133 Mechanisms for persistence of acute and chronic feline calicivirus (FCV) infections in the face of vaccination N.C. Pedersen and K. Floyd Hawkins (Davis, CA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141 Serologic comparison of four isolates of rabbit hemorrhagic disease virus M.L. Beminger and C. House (Greenport, NY, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157 Identification of a region of the Alcelaphine Herpesvirus- 1 genome associated with virulence for rabbits J.A. Handley, D.R. Sargan, A.J. Herring and H.W. Reid (Edinburgh, UK) . . . . . . . . . . 167 In vitro amplification of the 16s rRNA genes from Mycoplasma bovis and Mycoplasma agalactiae by PCR Y.R. Chavez Gonzalez (La Habana, Cuba), C.R. Bascuilana, G. Btilske, J.G. Mattsson (Uppsala, Sweden), C.F. Molina (La Habana, Cuba) and K.E. Johansson (Uppsala, Sweden) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183 Development and evaluation of a selective and indicative medium for isolation of Actinobacillus pleuropneumoniae from tonsils M.J. Jacobsen and J.P. Nielsen (Copenhagen, Denmark) . . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . 191 Analyses of restriction fragment patterns (RFPs) and pathogenicity in baby mice of equine herpesvirus 1 and 4 (EHV- 1 and EHV-4) strains circulating in Danish horses V. Palfi and L.S. Christensen (Copenhagen, Denmark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199 VOL. 47 NOS. 3-4
1995
The serological response to Salmonella serovars typhimurium and infantis in experimentally infected pigs. The time course followed with an indirect anti-LPS ELISA and bacteriological examinations B. Nielsen, D. Baggesen, F. Bager, J. Haugegaard and P. Lind (Copenhagen, Denmark) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205 Susceptibility to Actinobacillus pleuropneunwniae infection in pigs from an endemically infected herd is related to the presence of toxin-neutralizing antibodies T. Cruijsen, L.A.M.G. Van Leengoed (Utrecht, The Netherlands), E.M. Kamp, A. Bartelse, A. Korevaar (City AB Lelystad, The Netherlands) and J.H.M. Verheijden (Utrecht, The Netherlands) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219 Aerobactin production by enterotoxigenic Escherichia coli of porcine intestine S. Suarez, C. Celemin, E. Zduficzyr, E. Medina (Le6n, Spain) and P.H. Williams (Leicester, UK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229 The prevalence of F107 fimbriae and their association with Shiga-like toxin II in Escherichia coli strains from weaned Australian pigs E.J. Hide, I.D. Connaughton, S.J. Driesen, D. Hasse, R.P. Monckton and N.G. Sammons (Bendigo, Australia) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 235 Chlamydia psittaci in turkeys: pathogenesis of infections in avian serovars A, B and D D. Vanrompay (Gent, Belgium), J. Mast (K. Mercierlaan Heverlee, Belgium), R. Ducatelle, F. Haesebrouck (Gent, Belgium) and B. Goddeeris (K. Mercierlaan Heverlee, Belgium) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . 245 Serological crossreactivity between Brucella abortus and Yersinia enterocolitica 0:9 I Immunoblot analysis of the antibody response to Brucella protein antigens
Contents Volume 471 Veterinary Microbiology
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in bovine brucellosis R. Kittelberger, F. Hilbink, M.F. Hansen, M. Penrose (Box Upper Hutt, New Zealand), G.W. De Lisle (Upper Hutt, New Zealand), J.-J. Letesson (Namur, Belgium), B. Garin-Bastuji (Maisons-Alford, France), J. Searson (Wagga Wagga, Australia), C.A. Fossati (Buenos Aires, Argentina), A. Cloeckaert (Nouzilly, France) and G. Schurig (VA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257 Serological crossreactivity between Brucella abortus and Yersinia enterocolitica 0:9 II The use of Yersinia outer proteins for the specific detection of Yersinia enterocolitica infections in ruminants R. Kittelberger, F. Hilbink, M.F. Hansen, G.P. Ross, M.A. Joyce (Upper Hutt, New Zealand), S. Fenwick (Palmerston North, New Zealand), J. Heesemann (Wiirzburg, ,__ - Germany), . . H. Wolf-Watz (Umeb, Sweden) and K. Nielsen (Nepean, Writ., Canada) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271 Phenotypic characterisation of Pasteurella multocida isolates from Australian poultry N. Fegan, P.J. Blackall and J.L. Pahoff (Yeerongpilly Qld., Australia) . . .. . . .. . .. . . . . 281 Influence of chondroitinase on indirect hemagglutination titers and phagocytosis of Pasteurella multocida serogroups A, D and F R.B. Rimler, K.B. Register (Ames, Iowa, USA), T. Magyar (Budapest, Hungary) and M.R. Ackermann (Ames, Iowa, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287 Antimicrobial activity of chicken and turkey heterophil peptides CHPl, CHP2, THPl , and THP3 E.W. Evans, F. Gwen Beach, K.M. Moore, M.W. Jackwood, J.R. Glisson and B.G. Harmon (Athens, GA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295 Molecular epidemiology of Mycoplasma mycoides subsp. mycoides biotype Small Colony, the agent of contagious bovine pleuropneumonia F. Poumarat and M. Solsona (Lyon, France) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 305 Six antigenic groups within the genus pestivirus as identified by cross neutralization assays A. Dekker, G. Wensvoort and C. Terpstra (Lelystad, The Netherlands) . . . . . . . . . . . . . . 3 17 Development of a simple, rapid and accurate in vitro whole blood technique for the detection and semi-quantification of FIV cellular viremia A.L. Guiot, D. Rigal, D. Pialot and G. Chappuis (Lyon, France) . . . . . . . . . . . . . . . . . . _. . . 33 1 Spiroc,hetes isolated from dairy cattle with papillomatous digital dermatitis and interdigital dermatitis R.L. Walker, D.H. Read, K.J. Loretz and R.W. Nordhausen (Davis, CA, USA) . . . 343 Apoptosis in chicken embryo fibroblasts caused by Newcastle disease virus K.M. Lam (Davis, CA, USA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 357 Differentiation of African horse sickness viruses by polymerase chain reaction and segments 10 restriction patterns S. Zientara, C. Sailleau, S. Moulay and C. Cruciere (Maisons-Alfort, France) . . . . . . 365 Diagnosis of fetal infection with porcine parvovirus by in situ hybridization A.S. Waldvogel, S. Broll, M. Rosskopf, M. Schwyzer and A. Pospischil (Zurich, Switzerland) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 377 Detection of ileal symbiont intracellularis in porcine faecal samples by polymerase chain reaction B.M. MC Cormick, D. Hasse and R.P. Monckton (Bendigo, Australia) . . . . . . . . . . . . . . . 387 Cytocidal infection of hog cholera virus in porcine bone marrow stroma cell cultures M. Shimizu, S. Yamada and T. Nishimori (Tsukuba, Ibaraki, Japan) . . . . . . . . . . . . . . . . . . 395