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Articles by C. Sumantri
Total Records ( 5 ) for C. Sumantri
  K.W. Kia , I.I. Arief , C. Sumantri and C. Budiman
  This study aims to demonstrate the efficiency of antibacterial activity of plantaricin IIA-1A5 in meatball when stored at room temperature. The results revealed addition of plantaricin IIA-1A5 to meatball reduced population of contaminant pathogenic bacteria of Staphylococcus aureus and Escherichia coli. Furthermore, the application of 0.3% plantaricin IIA-1A5 extends the shelf life of the meatball to up to 20 h at room temperature based on its microbiology quality, as stated by the Indonesian National Standard for meatball products. The ability of plantaricin IIA-1A5 in retarding the growth of these pathogenic bacteria is comparable to that of 0.3% nitrite, which has been widely used. In addition, Aw and pH values of meatball in the absence (or in the presence) of nitrite or plantaricin did not significantly vary. This implies that reducing the population of pathogenic bacteria was indeed affected by nitrite or plantaricin IIA-1A5. Overall, this result demonstrated that the use of plantaricin IIA-1A5 as a nitrite replacer is promising.
  M.H. Tamzil , R.R. Noor , P.S. Hardjosworo , W. Manalu and C. Sumantri
  An experiment was conducted to study the response of three chicken lines with different HSP 70 genotypes to acute heat stress. Twenty eight kampong chicken (native chicken, with seven genotypes i.e., AA, AB, AC, CC, AD, DD and BC) and twenty four Arabic chicken (with six genotypes i.e., AA, AB, AC, CC, AD and BC) and four commercial chickens (with one genotype i.e., DD) were used and randomly allocated in a factorial arrangement into groups which their HSP 70 genotypes had been identified. Acute heat stress was exposed at 40°C for 0.5, 1.0 and 1.5 h, respectively, using chamber in 33 x 33 x 75 cm3. Parameters measured were the onset of panting (minute), panting frequency (times/minute), feed consumption (g/minute), water consumption (mL/minute), manure water content (%), rectal temperature (°C), serum corticosterone concentration (μg/dL) and HSP 70 expression (copy mRNA). The result of this study showed that there was an interaction between chicken lines and acute heat stress exposure on water consumption and manure water content. Chicken lines affected panting frequencies and manure water content but it did not affect the onset of panting, feed and water consumptions, rectal temperature, serum corticosterone concentration and expression of HSP 70. Acute heat stress increased panting frequency, drinking water consumption, manure water content, rectal temperature, serum corticosterone concentration, HSP 70 expression and it decreased feed consumption. The highest response on panting frequency, rectal temperature, serum corticosterone concentration and expression of HSP 70 was found in the DD genotype and the lowest in AD genotype. The most rapid onset of panting occurred in DD genotype and the slowest in AD genotype. The study revealed interaction between chicken lines and HSP 70 genotypes in heat resistance. Kampong chicken had the highest heat resistance as compared to Arabic and commercial chickens but HSP 70 genotypes that was the most tolerant to high ambient temperature was AD genotype where as the lowest tolerant was DD genotype.
  M.H. Tamzil , R.R. Noor , P.S. Hardjosworo , W. Manalu and C. Sumantri
  Hematological responses in chicken with different HSP 70 genotypes to acute heat stress were studied using 28 kampong chickens, 24 Arabic chickens and 4 commercial chickens. The experimental chickens were selected randomly from a group of chickens with HSP 70 genotypes identified and were exposed to ambient temperature (40°C) for 0.5, 1.0 and 1.5 h. Results showed that erythrocyte, hematocrit and leukocyte in all chicken lines decreased in response to acute heat stress with the highest decrease in commercial chickens, followed by Arabic and kampong chickens. Regardless of acute heat stress exposure, there was no significant difference in erythrocyte, hemoglobin, leukocyte, heterophil, eosinophil, basophil, lymphocyte, monocyte and heterophil/lymphocyte ratio in all chicken lines studied. Arabic and commercial chickens had lower hematocrit as compared to kampong chickens. However, acute heat stress increased the percentage of heterophil, basophil, lymphocyte and heterophil/lymphocyte ratio without affecting eosinophil and monocyte. It was found that there was no interaction between lines of chicken and acute heat-stress exposure on the hematological parameters measured. The lowest percentage of lymphocytes was found in chickens with DD HSP 70 genotype while the highest was found in chickens with AD genotype. The results indicated that there was a relationship of heat resistance or tolerance to lymphocyte expression. Chickens that were the most tolerant to acute heat stress had the highest lymphocyte percentage (AD genotype) whereas those that were the least tolerant had the lowest lymphocyte percentage (DD genotype).
  N. Ulupi , Muladno , C. Sumantri and I.W.T. Wibawan
  Kampung chicken eggs play an important role as substance in 'jamu preparation' in Indonesia, mostly provided and consumed without cooking. Salmonella free eggs become significant in producing the safe 'jamu preparation' and such eggs might be produced by chickens which have high resistance to this bacteria. One of excellent markers showing resistance of chicken against Salmonella is an active Toll-like Receptor 4 (TLR4) gene. TLR4 is a phagocytes cell surface receptor that plays a role to recognize lipopolysaccharide of gram negative bacteria including Salmonella enteritidis. It is transcribed by TLR4 gene and conserved in the activation of the non-specific immune system. The aim of the research is to prove resistance of Kampung chicken when was challenged with S. enteritidis, using TLR4 gene as marker. TLR4 gene was genotyped in 50 Kampung chickens with PCR-RFLP. Then all the Kampung chickens were challenged with S. enteritidis (ID50:5×105 CFU/mL). Their expression on resistance against S. enteritidis as well as biological and molecular assays were measured. The genotyping result identified 3 genotypes of TLR4 gene: AA, AG and GG. All parameters including expression of TLR4 gene, concentration of leucocytes, differentiation of leucocytes, macrophages activity and capacity were not significantly different in AG and GG genotypes. There was no S. enteritidis finding in blood and eggs produced by AA, AG and GG chickens. There was found IgY specific to S. enteritidis in eggs yolk with very high concentration (2.94-3.89 mg/mL). The study proved that Kampung chicken resistant to S. enteritidis infection in all condition.
  M. Muhsinin , N. Ulupi , A. Gunawan , IWT. Wibawan and C. Sumantri
  Background: Natural resistance-associated macrophage protein-1 gene (NRAMP1) plays an important role in immune response against intracellular pathogens. Objective: This study was aimed at identifying NRAMP1 polymorphisms and their association with immune traits in Indonesian native chickens. Methodology: Genetic polymorphism of chickens was investigated using polymerase chain reaction-restriction fragment polymorphism. The concentrations of leukocytes and differentiation (heterophile, lymphocyte and monocyte) were assessed by the Giemsa method and immune traits were detected by followed clearance test. Results: The results showed that NRAMP1 was polymorphic in all native chickens. The CC genotype was significantly higher than CT and TT genotypes (p<0.05) in Sentul chickens resistant to Salmonella pullorum. Although, the concentrations of leukocytes and differentiation in chickens with all three of NRAMP1 genotypes (CC, CT and TT) were not statistically different, there was a significant correlation between different NRAMP1 genotypes and immune traits. Therfore, NRAMP1 is proposed to be a disease resistance candidate gene. Conclusion: However, this study should be validated in other chicken populations to evaluate the potential exploitation of NRAMP1 in selective breeding.
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