I Wayan Sudira
Laboratorium Farmakologi Veteriner, Fakultas Kedokteran Hewan Universitas Udayana, Jl. PB. Sudirman, Sanglah, Denpasar, Bali; Indonesia, 80234

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ANTIBIOTIC SENSITIVITY OF ALPHA-HEMOLYTIC MUCOID ESCHERICHIA COLI FROM DIARRHEIC BALI CATTLE TO KANAMYCIN, ERYTHROMYCIN, AND AMPICILLIN Beatrice Cecilia Rebecca Situmorang; I Gusti Ketut Suarjana; I Wayan Sudira
Buletin Veteriner Udayana Bul. Vet. Udayana. August 2025 Vol. 17 No. 4
Publisher : Fakultas Kedokteran Hewan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/bulvet.2025.v17.i04.p02

Abstract

Diarrhea in Bali cattle caused by Escherichia coli alpha-hemolytic mucoid strain can lead to significant economic losses due to reduced livestock productivity. To address this issue, this study evaluated the antibiotic sensitivity patterns of E. coli isolates to kanamycin, erythromycin, and ampicillin. A total of 11 E. coli isolates were obtained from the feces of diarrheic Bali cattle and tested for antibiotic susceptibility using the Kirby-Bauer disk diffusion method on Mueller-Hinton agar. The inhibition zone diameters were measured and interpreted according to Clinical and Laboratory Standards Institute (CLSI) guidelines, categorizing the isolates as sensitive, intermediate, or resistant. The results revealed varying susceptibility patterns among the isolates. For kanamycin, 81.8% of the isolates were susceptible, 18.2% showed intermediate susceptibility, and none were resistant (0%). In contrast, all isolates (100%) exhibited complete resistance to both erythromycin and ampicillin, with no susceptibility or intermediate resistance observed (0% each). These findings underscore the critical need for prudent antibiotic selection in treating E. coli-induced diarrhea in Bali cattle. Additionally, this study highlights the urgency of further research into resistance mechanisms and the development of sustainable infection control strategies.
BIOSECURITY PRACTICES ON LAYER FARMS IN JATILUWIH VILLAGE, TABANAN, BALI Gabriel Adam Salombe; I Wayan Masa Tenaya; I Wayan Sudira; Romy Muhammad Dary Mufa
Buletin Veteriner Udayana Bul. Vet. Udayana. August 2025 Vol. 17 No. 4
Publisher : Fakultas Kedokteran Hewan Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/bulvet.2025.v17.i04.p06

Abstract

The layer poultry industry plays a vital role in fulfilling the population's demand for animal protein. To support sustainable livestock production, farms must implement biosecurity as a proactive strategy to prevent disease spread, thus ensuring the production of healthy and consumable animal-derived food products. This study aimed to evaluate the level of knowledge and implementation of biosecurity practices, including isolation, traffic control, and sanitation, and to analyze the correlation between knowledge and biosecurity implementation in layer poultry farms in Jatiluwih Village, Penebel District, Tabanan Regency, Bali. Data were collected through interviews using a total sampling method with a structured questionnaire based on the Guttman scale as the research instrument. The data were then tabulated using Microsoft Excel and analyzed with descriptive and quantitative methods. Spearman's rank correlation test was used to analyze the relationship between knowledge and biosecurity implementation. The results showed that the average knowledge of farmers regarding biosecurity was good (54.5%), with moderate implementation of isolation (48.1%), low implementation of traffic control (28.8%), and good sanitation practices (65.2%). However, the correlation between knowledge and the implementation of biosecurity practices was not statistically significant (p>0.05). Based on these findings, it can be concluded that although there was a positive correlation between knowledge and biosecurity implementation, this relationship was very weak between knowledge and traffic control, and moderate between knowledge and isolation, and knowledge and sanitation. Therefore, a more practical and adaptive approach is needed so that farmers can effectively and consistently implement the biosecurity concepts they understand.