Abstract. Wibisono FJ, Sumiarto B, Untari T, Effendi MH, Permatasari DA, Witaningrum AM. 2020. Short Communication: The presence of extended-spectrum beta-lactamase (ESBL) producing Escherichia coli on layer chicken farms in Blitar Area, Indonesia. Biodiversitas 21: 2667-2671. This study was aimed to determine the incidence of Extended-Spectrum Beta-Lactamase (ESBL) producing Escherichia coli on layer chicken in Blitar area. This was a cross-sectional study with a total of 205 cloacal swabs of layer chicken taken randomly. The sample was in isolation identification on MacConkey media and ESBL confirmation test produced by Escherichia coli was then carried out by the Double Disc Synergy Test (DDST) method and the VITEK® 2 Compact Automated System method. This study showed that 185 (90.24%) isolates of positive Escherichia coli from a total of 205 samples of cloacal swabs of the layer chicken. The incidence of ESBL-producing Escherichia coli in cloacal swabs on layer chicken with the Double Disc Synergy Test (DDST) method and the VITEK® 2 compact automatic method was 13 (7.03%). Results in this study indicated that layer chicken has potential as reservoir for spreading ESBL to public health and needs strict hygienic measures to prevent their transmission to humans.

Aim: The study aimed to detect the invA gene in Salmonella isolated from milkfish in the Sidoarjo wet fish market. Materials and Methods: A total of 84 samples were prepared in enrichment media and isolated on the surface of Salmonella Shigella Agar. Salmonella growth produces transparent colonies with blackish color in the middle due to H2S gas formation. Samples were identified as Salmonella based on macroscopic colony morphology. Presumptive Salmonella sp. was put on Bismuth Sulfite Agar media. Salmonella was determined based on the results of the biochemical test that has been carried out using Microbact identification kits from negative gram staining. Results: The results of this study indicate that 32 of 84 samples (38.09%) were Salmonella bacteria. Furthermore, the invA gene detection was carried out using the polymerase chain reaction technique. Electrophoresis results showed four positive samples contained invA gene with a length of 284 bp. Conclusion: Results in this study indicate that contamination of milkfish with Salmonella needs strict hygienic measures to prevent their transmission to human.

Abstract. Permatasari DA, Witaningrum AM, Wibisono FJ, Effendi MH. 2020. Detection and prevalence of multidrug-resistant Klebsiella pneumoniae strain isolated from poultry farms in Blitar, Indonesia. Biodiversitas 21: 4642-4647. Antibiotics are commonly used as therapy and disease control in humans and animals. However, the widespread use of antibiotics may also trigger the rise of antibiotic resistance. Therefore, the aim of this study was to study the occurrence of Multidrug-Resistant (MDR) of Klebsiella pneumoniae from poultry farms in Blitar. Chicken cloacal swabs were collected from 63 poultry farms (32 broilers and 31 layers) were taken randomly, using total samples 160 broilers and 155 layers. The collected swab samples were inoculated on MacConkey agar medium for isolation and identification. Single colonies were isolated after primary positive cultures and identified by using the IMViC test and TSIA. 28 (8.88%) out of samples were positive for Klebsiella pneumoniae. The antimicrobial confirmation test showed that 53.57% of the K. pneumoniae isolates were Multi-Drug Resistance (MDR) bacteria. The percentage of MDR bacteria against different antibiotics included ampicillin 75%, Erythromycin 42.86%, Tetracycline 35.72%, Sulfamethoxazole 32.14% and Streptomycin 21.4%. This study confirms that the percentage of resistant isolates of Klebsiella pneumoniae from 5 antimicrobial agents of broiler chicken is higher than layer chicken. The presence of multidrug-resistant bacteria is a threat to public health and livestock. The impact of these conditions leaves a limited treatment option as chicken farmers in Indonesia still using antibiotics without veterinarian supervision.

Abstract. Wibisono FJ, Sumiarto B, Untari T, Effendi MH, Permatasari DA, Witaningrum AM. 2020. Short Communication: Pattern of antibiotic resistance on extended-spectrum beta-lactamases genes producing Escherichia coli on laying hens in Blitar, Indonesia. Biodiversitas 21: 4631-4635. The aims of this study were to determine the susceptibility pattern of phenotypic antibiotics on extended-spectrum beta-lactamases (ESBL) genes and genotype profiles of ESBL producing Escherichia coli strains isolated from cloacal samples of laying hens in Blitar. A total of 165 cloacal swab samples were successfully isolated 145 E. coli strains during the study taken from 5 subdistricts in Blitar. All the strains were examined for antibiotic resistance patterns by disk diffusion method with double-disk synergy test (DDST), followed testing with VITEK® 2 methods, molecular identification of ESBL coding genes using PCR. The results of this study showed that the characterization of nucleotide analysis from PCR amplification of ESBL-producing E. coli bacteria isolated from laying hens in Blitar showed that eight isolates were the dominant of CTX gene, followed by the TEM encoding gene of two isolates, and the SHV coding gene as much as one isolate. The presence of more than 1 encoding genes in the E. coli bacterial isolate was seen in 1 isolate, where the isolate carried the CTX gene and the SHV gene as well. All ESBL producing E. coli isolates were resistant to amoxicillin, ampicillin, cefazolin, cefotaxime, and ceftriaxone, and these ESBL isolates were more than 70% resistant to gentamicin, aztreonam, and trimethoprim/sulfamethoxazole. These results indicated that poultry is a potential reservoir for ESBL-producing E. coli. The presence of ESBL-producing E. coli in poultry requires strengthening antibiotic policy. This is important because the regulation of antibiotic use in poultry is gaining momentum to increase animal productivity and food safety in Blitar, Indonesia.

This study aims to calculate the estimated economic losses in national poultry farming in Indonesia that are infected with pathogenic Escherichia coli. Poor management of chicken preservation is a major predisposing factor. Escherichia coli is a normal flora found in the gastrointestinal tract of chicken, but when the chicken stress or decrease immune system, Escherichia coli develops into a pathogenic agent. Pathogenic Escherichia coli appears as secondary infections that aggravate other disease infection. Cost of illness approach was divided into two main categories namely direct losses from disease and indirect losses from other related costs. Direct losses in broiler farms that were infected with pathogenic Escherichia coli through calculation of weight loss of harvest and total mortality, while in layer farms that were infected with pathogenic Escherichia coli, direct loss calculations included decreased chicken egg production and total mortality. Indirect losses on broiler and layer farms included calculation of other expenditure costs at the time of the occurrence of pathogenic Escherichia coli infections such as cleaning, disinfection and labor compensation costs. Based on the total calculation results obtained that the estimated economic losses incurred on national scale broiler farms reached IDR 14,167,792,041,150, - per harvest period of broiler, while estimated total loss of layer farms on national scale based on the calculation results reached IDR 13,391,996,617,850, - per month. The overall total loss due to this colibacillosis reached 13.10% of total poultry assets in Indonesia. The large proportion of losses incurred to total livestock assets can indicate how important the disease is to be controlled or overcome.