STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA
The aim of this study was to determine the species composition of streptococci causing subclinical, and clinical mastitis in dairy cows, their prevalence and antimicrobial drug sensitivity with respect to appropriate therapy. The study subject was the involvement and prevalence of bacteria from t...
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| Format: | Article |
| Language: | English |
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Trakia University
2022-06-01
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| Series: | Trakia Journal of Sciences |
| Subjects: | |
| Online Access: | http://tru.uni-sz.bg/tsj/Volume%2020,%202022,%20Numbe%202,%20Series%20Biomedical%20Sciences/5_M.Nikolova.pdf |
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| author | M. Nikolova V. Urumova M. Liuzkanov |
| author_facet | M. Nikolova V. Urumova M. Liuzkanov |
| author_sort | M. Nikolova |
| collection | DOAJ |
| description | The aim of this study was to determine the species composition of streptococci causing subclinical, and
clinical mastitis in dairy cows, their prevalence and antimicrobial drug sensitivity with respect to
appropriate therapy.
The study subject was the involvement and prevalence of bacteria from the genus Streptococcus in the
etiology of subclinical, and clinical mastitis in dairy cows. The survey was conducted in eight cattle farms
from different regions in Bulgaria in 2020 and 2021. After clinical examination and rapid mastitis test, a
total of 239 cows were diagnosed with udder inflammation - 34 (14.2%) with clinical signs and 205
(85.8%) with subclinical mastitis. Laboratory analyses were performed on 346 samples. Two hundred
and seventy two bacterial strains were isolated, and 151 (55.5%) were determined to belong to
Streptococcus spp. Lancefield grouping and species identification of haemolytic variants was done. It was
found out that in subclinical forms of mastitis, 54.5% of isolates belonged to Streptococcus spp.,
respectively 63.3 % of isolates in clinical forms of mastitis also belonged to Streptococcus spp. Out of
them, 38.6% were S. uberis, 35.6% were identified as S. agalactiae and 25.8% as S. dysgalactiae. In
vitro tests of the sensitivity to antimicrobial drugs from various groups and classes were conducted with
all field isolates. The tests demonstrated a relatively well-preserved sensitivity to antimicrobial agents
with the exception of tetracycline. |
| first_indexed | 2024-04-13T16:54:12Z |
| format | Article |
| id | doaj.art-c25d54cd58784ff78c3d76d2cde873d1 |
| institution | Directory Open Access Journal |
| issn | 1313-3551 |
| language | English |
| last_indexed | 2024-04-13T16:54:12Z |
| publishDate | 2022-06-01 |
| publisher | Trakia University |
| record_format | Article |
| series | Trakia Journal of Sciences |
| spelling | doaj.art-c25d54cd58784ff78c3d76d2cde873d12022-12-22T02:38:51ZengTrakia UniversityTrakia Journal of Sciences1313-35512022-06-0120211311810.15547/tjs.2022.02.005STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIAM. NikolovaV. UrumovaM. LiuzkanovThe aim of this study was to determine the species composition of streptococci causing subclinical, and clinical mastitis in dairy cows, their prevalence and antimicrobial drug sensitivity with respect to appropriate therapy. The study subject was the involvement and prevalence of bacteria from the genus Streptococcus in the etiology of subclinical, and clinical mastitis in dairy cows. The survey was conducted in eight cattle farms from different regions in Bulgaria in 2020 and 2021. After clinical examination and rapid mastitis test, a total of 239 cows were diagnosed with udder inflammation - 34 (14.2%) with clinical signs and 205 (85.8%) with subclinical mastitis. Laboratory analyses were performed on 346 samples. Two hundred and seventy two bacterial strains were isolated, and 151 (55.5%) were determined to belong to Streptococcus spp. Lancefield grouping and species identification of haemolytic variants was done. It was found out that in subclinical forms of mastitis, 54.5% of isolates belonged to Streptococcus spp., respectively 63.3 % of isolates in clinical forms of mastitis also belonged to Streptococcus spp. Out of them, 38.6% were S. uberis, 35.6% were identified as S. agalactiae and 25.8% as S. dysgalactiae. In vitro tests of the sensitivity to antimicrobial drugs from various groups and classes were conducted with all field isolates. The tests demonstrated a relatively well-preserved sensitivity to antimicrobial agents with the exception of tetracycline.http://tru.uni-sz.bg/tsj/Volume%2020,%202022,%20Numbe%202,%20Series%20Biomedical%20Sciences/5_M.Nikolova.pdfcowsmastitisstreptococciprevalencesensitivityantibiotics |
| spellingShingle | M. Nikolova V. Urumova M. Liuzkanov STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA Trakia Journal of Sciences cows mastitis streptococci prevalence sensitivity antibiotics |
| title | STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA |
| title_full | STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA |
| title_fullStr | STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA |
| title_full_unstemmed | STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA |
| title_short | STREPTOCOCCUS SPP. AS ETIOLOGICAL AGENT OF SUBCLINICAL AND CLINICAL MASTITIS OF DAIRY COWS IN REPUBLIC OF BULGARIA |
| title_sort | streptococcus spp as etiological agent of subclinical and clinical mastitis of dairy cows in republic of bulgaria |
| topic | cows mastitis streptococci prevalence sensitivity antibiotics |
| url | http://tru.uni-sz.bg/tsj/Volume%2020,%202022,%20Numbe%202,%20Series%20Biomedical%20Sciences/5_M.Nikolova.pdf |
| work_keys_str_mv | AT mnikolova streptococcussppasetiologicalagentofsubclinicalandclinicalmastitisofdairycowsinrepublicofbulgaria AT vurumova streptococcussppasetiologicalagentofsubclinicalandclinicalmastitisofdairycowsinrepublicofbulgaria AT mliuzkanov streptococcussppasetiologicalagentofsubclinicalandclinicalmastitisofdairycowsinrepublicofbulgaria |