Epizootic bovine abortion in a dairy herd: Characterization of a Chlamydia psittaci isolate and antibody response

A chlamydial agent was recovered from the placental cotyledons of an aborting cow from a 100-cow dairy herd in Cumbria. Immunoblotting analysis of purified elementary bodies of the isolate revealed a reactivity pattern typical of serotype I Chlamydia psittaci strains. Nucleotide sequencing of the ma...

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Veröffentlicht in:British veterinary journal 1995-11, Vol.151 (6), p.683-693
Hauptverfasser: Griffiths, P.C., Plater, J.M., Martin, T.C., Hughes, S.L., Hughes, K.J., Hewinson, R.G., Dawson, M.
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container_end_page 693
container_issue 6
container_start_page 683
container_title British veterinary journal
container_volume 151
creator Griffiths, P.C.
Plater, J.M.
Martin, T.C.
Hughes, S.L.
Hughes, K.J.
Hewinson, R.G.
Dawson, M.
description A chlamydial agent was recovered from the placental cotyledons of an aborting cow from a 100-cow dairy herd in Cumbria. Immunoblotting analysis of purified elementary bodies of the isolate revealed a reactivity pattern typical of serotype I Chlamydia psittaci strains. Nucleotide sequencing of the major outer membrane protein (MOMP) gene further confirmed the isolate, BA1, as a serotype I strain. The sequence was identical to that of the type strain of ovine enzootic abortion, B577. In both the antigenic and MOMP sequencing analyses BA1 was distinguishable from serotype II C. pecorum strains. A sequential series of sera obtained from the aborting cow, from which BA1 was recovered, was analysed by immunoblotting against the homologous isolate, and demonstrated reactivity to major chlamydial antigens over a 110-day period. Close contact between ruminant species on the farm suggested that the C. psittaci strain may have been transmitted to cattle from infected sheep.
doi_str_mv 10.1016/S0007-1935(95)80149-9
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Immunoblotting analysis of purified elementary bodies of the isolate revealed a reactivity pattern typical of serotype I Chlamydia psittaci strains. Nucleotide sequencing of the major outer membrane protein (MOMP) gene further confirmed the isolate, BA1, as a serotype I strain. The sequence was identical to that of the type strain of ovine enzootic abortion, B577. In both the antigenic and MOMP sequencing analyses BA1 was distinguishable from serotype II C. pecorum strains. A sequential series of sera obtained from the aborting cow, from which BA1 was recovered, was analysed by immunoblotting against the homologous isolate, and demonstrated reactivity to major chlamydial antigens over a 110-day period. 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Immunoblotting analysis of purified elementary bodies of the isolate revealed a reactivity pattern typical of serotype I Chlamydia psittaci strains. Nucleotide sequencing of the major outer membrane protein (MOMP) gene further confirmed the isolate, BA1, as a serotype I strain. The sequence was identical to that of the type strain of ovine enzootic abortion, B577. In both the antigenic and MOMP sequencing analyses BA1 was distinguishable from serotype II C. pecorum strains. A sequential series of sera obtained from the aborting cow, from which BA1 was recovered, was analysed by immunoblotting against the homologous isolate, and demonstrated reactivity to major chlamydial antigens over a 110-day period. 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Immunoblotting analysis of purified elementary bodies of the isolate revealed a reactivity pattern typical of serotype I Chlamydia psittaci strains. Nucleotide sequencing of the major outer membrane protein (MOMP) gene further confirmed the isolate, BA1, as a serotype I strain. The sequence was identical to that of the type strain of ovine enzootic abortion, B577. In both the antigenic and MOMP sequencing analyses BA1 was distinguishable from serotype II C. pecorum strains. A sequential series of sera obtained from the aborting cow, from which BA1 was recovered, was analysed by immunoblotting against the homologous isolate, and demonstrated reactivity to major chlamydial antigens over a 110-day period. 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subjects Abortion, Veterinary - epidemiology
Abortion, Veterinary - microbiology
Animals
Antibodies, Bacterial
antibody response
antigen profile
Antigens, Bacterial - genetics
Base Sequence
bovine abortion
Cattle
Cattle Diseases - epidemiology
Cattle Diseases - microbiology
Chlamydia psittaci
Chlamydophila psittaci - chemistry
Chlamydophila psittaci - immunology
Chlamydophila psittaci - isolation & purification
Disease Outbreaks
Female
Genes, Bacterial - genetics
Molecular Sequence Data
ompA gene sequence
Pregnancy
Psittacosis - epidemiology
Psittacosis - microbiology
Psittacosis - veterinary
Sheep
Sheep Diseases - epidemiology
Sheep Diseases - microbiology
United Kingdom - epidemiology
title Epizootic bovine abortion in a dairy herd: Characterization of a Chlamydia psittaci isolate and antibody response
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