Aims: This study aimed to assess the risk of reproductive tract contamination in Aceh cattle by Escherichia fergusonii as revealed by 16S rRNA gene sequencing of preputial swab samples. Methodology and results: Preputial swabs taken from 50 breeding bulls at the Indrapuri Breeding and Forage Center of Aceh Cattle, Banda Aceh, Indonesia, were examined for the presence of bacteria. Samples were streaked on MacConkey agar and incubated under aerobic conditions at 37 °C for 24 h. Smooth, yellow-or rose-colored colonies were selected for their characteristic appearance and subjected to further analysis. Genetic identification was based on 16S rRNA gene sequencing and PCR analysis. We conducted a 16S rRNA sequence similarity search with GenBank using BLAST and constructed neighbour-joining dendrograms using MEGA. From among closely related species of the genus Enterobacteriaceae, we identified the enteric bacterium E. fergusonii as having the highest sequence similarity. Conclusion, significance and impact of study: We concluded that the E. fergusonii bacterium positively presence in preputial swab samples of clinically healthy Aceh cattle population. Accordingly, it is potentially allowing the bacterium to be spread during natural mating or semen collection processing for artificial insemination in cattle breeding farm.

Aim:This research aimed to identify Staphylococcus species isolated from preputial swabs of healthy Aceh cattle, based on 16S ribosomal RNA gene analysis.Materials and Methods:The bacterium was isolated from preputial swabs of healthy Aceh cattle. The total DNA from the isolated bacteria was extracted using the Genomic DNA Mini Kit followed by polymerase chain reaction (PCR) amplification of the 16S rRNA gene. The product of PCR amplification was then sequenced and aligned to the known sequences in the GenBank database by multiple alignments and was also analyzed by bioinformatics software to construct a phylogenetic tree.Results:The results revealed that the bacterial isolate 3A had genetically closed relation to Staphylococcus pasteuri with <97% maximum identity. Data derived from the phylogenetic tree revealed that the bacterial isolate 3A was also related to Staphylococcus warneri, yet, it shows a different evolutionary distance with the ancestors (S. pasteuri).Conclusion:The results of this research suggested that the bacterium 3A, isolated from preputial swabs of healthy Aceh cattle, is a Staphylococcus species.

Mastitis menjadi salah satu penyakit yang menyebabkan penurunan produksi ternak dan sulit disembuhkan dengan menggunakan antibiotik dan dapat menimbulkan residu, serta memicu resistensi antibiotik. Penelitian ini bertujuan untuk mengetahui bakteri Gram positif yang dapat menjadi penyebab mastitis pada sapi. Penelitian menggunakan sampel yang diambil dari peternakan rakyat dengan cara swab ambing ternak. Isolasi bakteri dilakukan dengan cara penanaman pada media Mannitol Salt Agar (MSA) dan melakukan Identifikasi dengan pewarnaan Gram, Uji Katalase dan Uji biokimia (maltosa dan laktosa). Data dianalisis menggunakan analisis deskriptif yaitu jenis-jenis bakteri sebagai agen penyebab mastitis. Hasil penelitian yang didapatkan sebagai bakteri penyebab mastitis spesies Staphylococcus aureus dan Micrococcus sp. yang tergolong pada bakteri Gram positif. Dapat disimpulkan bahwa pada sapi terindikasi mastitis terdapat bakteri Gram positif, hal tersebut secara morfologi diidentifikasi yaitu Staphylococcus aureus dan Micrococcus.

Biofilm  is one of parameters for determining pathogenic pathways of a bacterium. Bacterial virulence activities can be attenuated by antibiotics with inhibiting biofilm. The aim of this study was to examine the characteristics and activities of antibiotics against the biofilm of Stapylococcus aureus isolate which taken from Aceh cattle prepuce. The study was exploratory and experimental, using a Completely Randomized Design (RAL) factorial pattern using three types of antibiotics, three concentrations and replications. Antibiotics were tetracycline, oxytetracycline and phosphomycin with concentrations of 10%, 20% and 30% (mg/mL), respectively. Therefore, the aim of this study was to examine the characteristics and activities of antibiotics to the biofilm of Stapylococcus aureus from Aceh cattle prepuce isolate. U-bottom polystyrene 96 wells microplate and Nutrient Broth (NB)  medium were used to biofilm. Bacterial  while biofilm was stained on crystals violet 1%. Optical Density (OD) of biofilm were  λ 595 nm. Data were analyzed by using Analysis Of Variance (ANOVA). The results showed that the activity of Staphylococcus aureus was moderately positive, i.e 2,667cell/μL. It showed that antibiotics and concetrations have significant effect (P<0.05) to inhibit biofilm staphylococcus aureus. In additioon, tetracycline 30% (mg / mL) has the best ability to inhibit biofilms from 52,18% to 1,262 cell/μL. Based on that fact, it can be concluded that the virulence of Staphylococcus aureus was moderate positive to be false positive. Keywords: biofilm, antibiotics, Staphylococcus aureus, cows aceh.                Abstrak Biofilm merupakan salah satu parameter untuk menentukan jalur patogenisitas suatu bakteri. Antibiotik dapat melemahkan aktivitas virulensi bakteri dengan menghambat pembentukan biofilm. Penelitian ini bertujuan untuk melihat karaksteristik dan aktivitas antibiotik terhadap biofilm Stapylococcus aureus isolat preputium sapi Aceh. Penelitian bersifat eksplorasi dan eksperimental, menggunakan Rancangan Acak Lengkap (RAL) pola faktorial dengan menggunakan tiga jenis antibiotik, tiga konsentrasi dan tiga kali ulangan. Antibiotik yang digunakan adalah tetrasiklin, oksitetrasiklin dan fosfomisin dengan konsentrasi masing-masing 10%, 20% dan 30% (mg/mL). Pengujian biofilm dilakukan pada media Nutrient Broth (NB), menggunakan mikroplat U-bottom polystyrene 96 wells. Pewarnaan biofilm menggunakan kristal violet 1%. Optical Density (OD) biofilm dibaca pada    λ 595 nm. Data hasil penelitian dianalisis dengan menggunakan Analysis Of Variance (ANOVA). Hasil penelitian menunjukkan aktivitas virulensi Staphylococcus aureus isolat preputium sapi Aceh berdasarkan karaksteristik biofilm tergolong positif moderat, yaitu 2,667cell/µL. Uji Biofilm menunjukkan jenis dan konsentrasi antibiotik berpengaruh secara nyata (P<0,05) terhadap daya hambat biofilm Staphylococcus aureus isolat preputium sapi Aceh. Tetrasiklin 30% (mg/mL) mempunyai kemampuan paling baik menghambat pembentukan biofilm Staphylococcus aureus isolat preputium sapi Aceh sebesar 52,18% menjadi 1,262 cell/µL, sehingga aktivitas virulensi Staphylococcus aureus isolat preputium sapi Aceh berdasarkan karaksteristik biofilm dari positif moderat menjadi positif palsu. Kata Kunci: biofilm, antibiotik, Staphylococcus aureus, sapi aceh.