<i>Streptococcus dysgalactiae</i>—Contagious or Environmental?
<i>Streptococcus dysgalactiae</i> is among the most important pathogens causing bovine mastitis. Unfortunately, there is presently a lack of clear knowledge about the mode of transmission—contagious or environmental—of this pathogen. To obtain more information on this, knowledge of the g...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-11-01
|
| Series: | Animals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-2615/10/11/2185 |
| _version_ | 1797547136800260096 |
|---|---|
| author | Nicole Wente Volker Krömker |
| author_facet | Nicole Wente Volker Krömker |
| author_sort | Nicole Wente |
| collection | DOAJ |
| description | <i>Streptococcus dysgalactiae</i> is among the most important pathogens causing bovine mastitis. Unfortunately, there is presently a lack of clear knowledge about the mode of transmission—contagious or environmental—of this pathogen. To obtain more information on this, knowledge of the genetic diversity of the isolated microorganisms at the farm level can be useful. To observe the strain variety in different herds of cattle, isolates of <i>Strep. dysgalactiae</i> were collected from clinical mastitis samples at different farms, and the strains were typed using the pulsed-field gel electrophoresis (PFGE) method. Overall, we performed strain typing on 93 isolates from 16 farms in Germany and used an index to describe the degree of contagiosity of <i>Strep. dysgalactiae</i> at each farm. This index (CI) represents the number of isolates divided by the number of strains found in mastitis milk of clinical cases within a period of 14 months. The results differed between the farms. In one farm, all six <i>Strep. dysgalactiae</i> cases that occurred during the study period were caused by a single strain (CI = 6), while in another farm the six cases that occurred were caused by five different strains (CI = 1.2). All other farms fell between these two extremes. This indicates that <i>Strep. dysgalactiae</i> infections can occur via several routes of transmission. At the farm level, strain comparisons are necessary to determine the routes of transmission. Two strains were able to survive on the farm for a minimum of 14 months. |
| first_indexed | 2024-03-10T14:39:58Z |
| format | Article |
| id | doaj.art-6e71086e229b40f791e6ef0998b000ae |
| institution | Directory Open Access Journal |
| issn | 2076-2615 |
| language | English |
| last_indexed | 2024-03-10T14:39:58Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Animals |
| spelling | doaj.art-6e71086e229b40f791e6ef0998b000ae2023-11-20T21:54:03ZengMDPI AGAnimals2076-26152020-11-011011218510.3390/ani10112185<i>Streptococcus dysgalactiae</i>—Contagious or Environmental?Nicole Wente0Volker Krömker1Department of Bioprocess Engineering and Microbiology, University of Applied Sciences and Arts Hannover, D-30453 Hannover, GermanyDepartment of Bioprocess Engineering and Microbiology, University of Applied Sciences and Arts Hannover, D-30453 Hannover, Germany<i>Streptococcus dysgalactiae</i> is among the most important pathogens causing bovine mastitis. Unfortunately, there is presently a lack of clear knowledge about the mode of transmission—contagious or environmental—of this pathogen. To obtain more information on this, knowledge of the genetic diversity of the isolated microorganisms at the farm level can be useful. To observe the strain variety in different herds of cattle, isolates of <i>Strep. dysgalactiae</i> were collected from clinical mastitis samples at different farms, and the strains were typed using the pulsed-field gel electrophoresis (PFGE) method. Overall, we performed strain typing on 93 isolates from 16 farms in Germany and used an index to describe the degree of contagiosity of <i>Strep. dysgalactiae</i> at each farm. This index (CI) represents the number of isolates divided by the number of strains found in mastitis milk of clinical cases within a period of 14 months. The results differed between the farms. In one farm, all six <i>Strep. dysgalactiae</i> cases that occurred during the study period were caused by a single strain (CI = 6), while in another farm the six cases that occurred were caused by five different strains (CI = 1.2). All other farms fell between these two extremes. This indicates that <i>Strep. dysgalactiae</i> infections can occur via several routes of transmission. At the farm level, strain comparisons are necessary to determine the routes of transmission. Two strains were able to survive on the farm for a minimum of 14 months.https://www.mdpi.com/2076-2615/10/11/2185<i>Streptococcus dysgalactiae</i>PFGEcontagiousenvironmental |
| spellingShingle | Nicole Wente Volker Krömker <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? Animals <i>Streptococcus dysgalactiae</i> PFGE contagious environmental |
| title | <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? |
| title_full | <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? |
| title_fullStr | <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? |
| title_full_unstemmed | <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? |
| title_short | <i>Streptococcus dysgalactiae</i>—Contagious or Environmental? |
| title_sort | i streptococcus dysgalactiae i contagious or environmental |
| topic | <i>Streptococcus dysgalactiae</i> PFGE contagious environmental |
| url | https://www.mdpi.com/2076-2615/10/11/2185 |
| work_keys_str_mv | AT nicolewente istreptococcusdysgalactiaeicontagiousorenvironmental AT volkerkromker istreptococcusdysgalactiaeicontagiousorenvironmental |