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Journal : Life Science and Biotechnology

Salmonella typhimurium injection as an immunostimulant: Study on chickens (Gallus gallus domesticus) lelono, Asmoro; Surya, Rizky
Life Science and Biotechnology Vol. 1 No. 2 (2023): November 2023
Publisher : Department of Biology, Faculty Mahematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/lsb.v1i2.43625

Abstract

Salmonella is a gram-negative bacteria commonly found in poultry-based products such as eggs and meat, which can affect quality and human health. The presence of these bacteria in poultry management can be traced to feed, water, substrate, and interactions with the environment. This study aims to investigate at the immune system of the avian at the age when the immune system begins to be produced independently through injection of S.typhimurium colonies. Salmonella culture at a density of 10-8 and 10-12 is injected into the digestive tract, and the increase in body temperature is measured immediately after injection. Two weeks later, an analysis of leukocyte differentiation is carried out. We found that salmonella injection affected body temperature and the rate of increase in body mass, both based on treatment and sex. This indicates that the immune system has worked even though the leukocyte differentiation indicators have not shown significant results. Chicks at the age of one month are able to show an immune response to bacterial infections through self-defence mechanisms. Further research needs to be carried out to understand whether leukocyte differentiation stimulates leukocyte variation with age.
Does the chick of domestik chicken (Gallus gallus domesticus) in early development would able to witstand the injection of crude LPS? lelono, Asmoro; Laensugi, Agatha Dei Gratia; Arimurti, Sattya
Life Science and Biotechnology Vol. 2 No. 2 (2024): November 2024
Publisher : Department of Biology, Faculty Mahematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/lsb.v2i2.53503

Abstract

Preventing bacterial infections in poultry farms is a key aspect of effective disease management strategies. Enhancing innate immunity serves as a vital preventive measure in chicken farming. Lipopolysaccharide (LPS), a fundamental component of the bacterial cell wall, has been successfully utilized to boost the innate immune response in susceptible poultry hosts. This study focused on examining the impact of administering crude LPS from Salmonella typhimurium to a domestic chicken (Gallus gallus domesticus) strain during its early developmental stages up to the pre-maturation phase. Immune responses in the chicks were evaluated by observing changes in body temperature and leukocyte differentiation. The chickens were divided into two groups: control (injected with 0.85% NaCl) and treatment (injected with the LPS). The injections were applied in three different ages 7 days, 24 days, and 41 days. The body temperature and leukocyte differential data were collected following the LPS injection. Results showed a significant difference in body temperature and heterophil at the ages of 24 and 41, indicating an immune response characterized by inflammation and elevated heterophil levels. There was a significant increase in basal temperature during early development in line with chicks' development to maintain their homeostatic system. This study concludes that the chicks demonstrated resilience to the presence of LPS by exhibiting heightened responses. The increasing of heterophils concentration provided strong evidence of their immune capability to overcome bacterial infections
The Negative effects on the immune system of native chicken embryos (Gallus gallus domesticus) due to extreme environmental fluctuations before incubation lelono, Asmoro
Life Science and Biotechnology Vol. 3 No. 1 (2025): May 2025
Publisher : Department of Biology, Faculty Mahematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Climate variability can influence avian reproductive success by altering environmental factors critical to egg viability and embryonic development. In avian species such as Gallus gallus domesticus, the period before incubation exposes eggs to fluctuating conditions that may affect their survival and the offspring’s physiological performance. This study evaluated the effects of pre-incubation environmental conditions on the growth and immune response of native chickens. Fertilized eggs were subjected to different temperature and humidity treatments before incubation to simulate natural ecological variations. The findings revealed that neither low-temperature exposure nor excessive moisture significantly reduced egg viability or embryonic development. Post-hatching observations, including biometric parameters and tonic immobility tests, showed no significant behavioral differences among treatment groups. Although all chicks exhibited daily weight gain, those from the control group displayed more stable growth patterns, indicated by lower standard error values. Measurements of innate immune response, inferred from body temperature fluctuation, were comparable across groups. These results suggest that native chicken eggs possess physiological plasticity that enables them to maintain normal embryogenesis and immune development under variable environmental conditions