Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh
Clinical mastitis (CM) is an important production disease in dairy cows, but much of the knowledge required to effectively control CM is lacking, specifically in low-income countries where most farms are small and have specific dairy management, such as regular udder cleaning and practicing hand mil...
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MDPI AG
2021-07-01
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| Series: | Animals |
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| Online Access: | https://www.mdpi.com/2076-2615/11/8/2255 |
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| author | Shuvo Singha Gerrit Koop Ylva Persson Delower Hossain Lauren Scanlon Marjolein Derks Md. Ahasanul Hoque Md. Mizanur Rahman |
| author_facet | Shuvo Singha Gerrit Koop Ylva Persson Delower Hossain Lauren Scanlon Marjolein Derks Md. Ahasanul Hoque Md. Mizanur Rahman |
| author_sort | Shuvo Singha |
| collection | DOAJ |
| description | Clinical mastitis (CM) is an important production disease in dairy cows, but much of the knowledge required to effectively control CM is lacking, specifically in low-income countries where most farms are small and have specific dairy management, such as regular udder cleaning and practicing hand milking. Therefore, we conducted a 6-month-long cohort study to (a) estimate the incidence rate of clinical mastitis (IRCM) at the cow and quarter level, (b) identify risk factors for the occurrence of CM, (c) describe the etiology of CM, and (d) quantify antimicrobial susceptibility (AMS) against commonly used antimicrobial agents in <i>S. aureus</i> and non-aureus <i>Staphylococcus</i> spp. (NAS) in dairy farms in the Chattogram region of Bangladesh. On 24 farms, all cows were monitored for CM during a 6-month period. Cases of CM were identified by trained farmers and milk samples were collected aseptically before administering any antimicrobial therapy. In total, 1383 lactating cows were enrolled, which totaled 446 cow-years at risk. During the study period, 196 new cases of CM occurred, resulting in an estimated crude IRCM of 43.9 cases per 100 cow-years, though this varied substantially between farms. Among the tested CM quarter samples, Streptococci (22.9%) followed by non-aureus staphylococci (20.3%) were the most frequently isolated pathogens and resistance of <i>S. aureus</i> and NAS against penicillin (2 out of 3 and 27 out of 39 isolates, respectively) and oxacillin (2 out of 3 and 38 out of 39 isolates, respectively) was common. The IRCM was associated with a high milk yield, 28 to 90 days in milk, and a higher body condition score. Our results show that there is substantial room for udder health improvement on most farms. |
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| language | English |
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| publishDate | 2021-07-01 |
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| series | Animals |
| spelling | doaj.art-03b93b1e9269460b8b3c975cf22289db2023-11-22T06:29:28ZengMDPI AGAnimals2076-26152021-07-01118225510.3390/ani11082255Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, BangladeshShuvo Singha0Gerrit Koop1Ylva Persson2Delower Hossain3Lauren Scanlon4Marjolein Derks5Md. Ahasanul Hoque6Md. Mizanur Rahman7Department of Medicine and Surgery, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshUdder Health Bangladesh, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshUdder Health Bangladesh, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshUdder Health Bangladesh, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshUdder Health Bangladesh, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshUdder Health Bangladesh, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshDepartment of Medicine and Surgery, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshDepartment of Medicine and Surgery, Chattogram Veterinary and Animal Sciences University, Chattogram 4225, BangladeshClinical mastitis (CM) is an important production disease in dairy cows, but much of the knowledge required to effectively control CM is lacking, specifically in low-income countries where most farms are small and have specific dairy management, such as regular udder cleaning and practicing hand milking. Therefore, we conducted a 6-month-long cohort study to (a) estimate the incidence rate of clinical mastitis (IRCM) at the cow and quarter level, (b) identify risk factors for the occurrence of CM, (c) describe the etiology of CM, and (d) quantify antimicrobial susceptibility (AMS) against commonly used antimicrobial agents in <i>S. aureus</i> and non-aureus <i>Staphylococcus</i> spp. (NAS) in dairy farms in the Chattogram region of Bangladesh. On 24 farms, all cows were monitored for CM during a 6-month period. Cases of CM were identified by trained farmers and milk samples were collected aseptically before administering any antimicrobial therapy. In total, 1383 lactating cows were enrolled, which totaled 446 cow-years at risk. During the study period, 196 new cases of CM occurred, resulting in an estimated crude IRCM of 43.9 cases per 100 cow-years, though this varied substantially between farms. Among the tested CM quarter samples, Streptococci (22.9%) followed by non-aureus staphylococci (20.3%) were the most frequently isolated pathogens and resistance of <i>S. aureus</i> and NAS against penicillin (2 out of 3 and 27 out of 39 isolates, respectively) and oxacillin (2 out of 3 and 38 out of 39 isolates, respectively) was common. The IRCM was associated with a high milk yield, 28 to 90 days in milk, and a higher body condition score. Our results show that there is substantial room for udder health improvement on most farms.https://www.mdpi.com/2076-2615/11/8/2255incidence ratepathogensantimicrobial resistanceclinical mastitisMALDI-TOF |
| spellingShingle | Shuvo Singha Gerrit Koop Ylva Persson Delower Hossain Lauren Scanlon Marjolein Derks Md. Ahasanul Hoque Md. Mizanur Rahman Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh Animals incidence rate pathogens antimicrobial resistance clinical mastitis MALDI-TOF |
| title | Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh |
| title_full | Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh |
| title_fullStr | Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh |
| title_full_unstemmed | Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh |
| title_short | Incidence, Etiology, and Risk Factors of Clinical Mastitis in Dairy Cows under Semi-Tropical Circumstances in Chattogram, Bangladesh |
| title_sort | incidence etiology and risk factors of clinical mastitis in dairy cows under semi tropical circumstances in chattogram bangladesh |
| topic | incidence rate pathogens antimicrobial resistance clinical mastitis MALDI-TOF |
| url | https://www.mdpi.com/2076-2615/11/8/2255 |
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