Growth performance and immune response of two commercial broiler strains fed diets containing Lactobacillus cultures and oxytetracycline under heat stress conditions

Zulkifli, I.; Abdulllah, N; Azrin, N M; Ho, Yin Wan

doi:10.1080/713654979

Cited by 279 publications

(172 citation statements)

References 30 publications

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“…In a heat stress study, Mashaly et al (2004) reported a decrease in antibody titres to sheep red blood cells in laying hens. These results agree with the findings of Zulkifli et al (2000), who showed that heat stress caused a reduction in antibody synthesis. Stressors increased serum corticosterone levels (Glaser & Kiecolt-Glaser, 2005;Quinteiro-Filho et al, 2010, 2012aShini et al, 2010), and this hormone inhibits antibody production by B cells (Gross, 1992), which might explain the inverse relationship we found between corticosterone levels and IgG titres.…”

Section: Discussionsupporting

confidence: 83%

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

et al. 2014

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Overcrowding stress is a reality in the poultry industry. Chickens exposed to long-term stressful situations present a reduction of welfare and immunosuppression. We designed this experiment to analyse the effects from overcrowding stress of 16 birds/m 2 on performance parameters, serum corticosterone levels, the relative weight of the bursa of Fabricius, plasma IgA and IgG levels, intestinal integrity, macrophage activity and experimental Salmonella Enteritidis invasion. The results of this study indicate that overcrowding stress decreased performance parameters, induced enteritis and decreased macrophage activity and the relative bursa weight in broiler chickens. When the chickens were similarly stressed and infected with Salmonella Enteritidis, there was an increase in feed conversion and a decrease in plasma IgG levels in the stressed and Salmonella-infected birds. We observed moderate enteritis throughout the duodenum of chickens stressed and infected with Salmonella. The overcrowding stress decreased the macrophage phagocytosis intensity and increased Salmonella Enteritidis counts in the livers of birds challenged with the pathogenic bacterium. Overcrowding stress via the hypothalamic-pituitary-adrenal axis that is associated with an increase in corticosterone and enteritis might influence the quality of the intestinal immune barrier and the integrity of the small intestine. This effect allowed pathogenic bacteria to migrate through the intestinal mucosa, resulting in inflammatory infiltration and decreased nutrient absorption. The data strengthen the hypothesis that control of the welfare of chickens and avoidance of stress from overcrowding in poultry production are relevant factors for the maintenance of intestinal integrity, performance and decreased susceptibility to Salmonella infection.

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Section: Discussionsupporting

confidence: 83%

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

et al. 2014

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“…Our findings concerning the immunopotantiation caused by probiotic administration concur with Pollmann et al, (1980); Zulkifli et al, (2000); Toms and Powvie (2001) ;Huang et al, (2004); Koenen et al, (2004). Also, Sevage et al, (1996) and Panda et al, (2000) demonstrated an increase in the serum immunoglobulins IgG and IgA after administration of competitive exclusion cultures.…”

Section: Results Listed In Tablesupporting

confidence: 73%

“…on bird's performance in case of absence of enteric infections revealed that these compounds are effective as they improve the growth of the broiler chickens (Mohan et al, 1996;Jin et al, 1998;Zulkifli et al, 2000;Kalvathy et al, 2003;Gracia et al, 2004;Huang et al, 2004;Opalinski et al, 2007;Midilli et al, 2009). On the other hand, Angle et al, (2005) found no improvement in performance but there were increased protein, calcium and phosphorus retention.…”

Section: Contrary Results Were Mentioned Bymentioning

confidence: 98%

A Trial to Prevent Salmonella Enteritidis Infection in Broiler Chickens Using Autogenous Bacterin Compared with Probiotic Preparation

El-Ghany¹,

El-Shafii²,

Hatem³

et al. 2012

JAS

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This study was carried out to investigate the efficacy of the locally prepared autogenous Salmonella Enteritidis (S. Enteritidis) bacterin as well as a probiotic preparation in the prevention of broiler chickens from S. Enteritidis infection. A total of three hundred and ten, one day-old Hubbard broiler chicks were used. At day old, ten chicks were sacrificed and examined bacteriologically to prove their freedom from S. Enteritidis infection. Three hundred birds were divided into four equal groups. Chickens in group (1) were kept as blank control negative non infected-non treated birds, while those of group (2) were challenged non treated birds. Group (3) was vaccinated intramuscularly by the autogenous bacterin at the first day of age in a dose of 0.2 ml/bird and boostered as a second dose at 10 days of age in a dose 0.5 ml/bird, however, group (4) was given a commercial probiotic preparation as 1gm/ 4 liter of the drinking water from the first day of age and continued for 5 successive days. All birds in groups 2, 3, and 4 were challenged orally by 0.5 ml containing 10 9 CFU/ml S. Enteritidis at 20 days of age. All the groups were kept under complete observation for three weeks for recording signs, moralities, gross lesions, shedding rate of S. Enteritidis, re-isolation of the organism, the performance as well as detection of the titer of antibodies serologically using microagglutination test and enzyme linked immunosorbant assay (ELISA) test. The results showed that the both the bacterin and the probiotic are equally effective in reducing signs, mortalities, gross lesions, the shedding rate and the re-isolation of S. Enteritidis and also increasing in the performance of chickens. The effect of the bacterin and the probiotic was significant (P≤0.05) when compared with the infected non treated chickens. Moreover, the serological investigation revealed an improvement in the titer of antibodies after vaccination and probiotic treatment. In conclusion, double doses of locally prepared autogenous S. Enteritidis bacterin and the probiotic preparation were effective and safe methods for prevention of S. Enteritidis infection in broiler chickens.

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“…Lactic acid bacteria (LAB) living symbiotically in the digestive tract of birds were found to enhance the immunity of animals to pathogenic bacteria (Zulkifli et al, 2000). LAB have adhesive properties and can colonize different parts of the avian digestive tract (Jin et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

The effects of lactic acid bacteria and mannan oligosaccharide, with or without fumaric acid, on chicken performance, slaughter yield and digestive tract microflora

Brzóska

Buluchevskij²,

Stecka³

et al. 2007

J. Anim. Feed Sci.

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In an experiment performed on 600 ROSS broilers the effect of dietary lactic acid bacteria (LAB), mannan oligosaccharide (MOS) without (LAB, MOS) or with fumaric acid (LAB, MOS, FUA) in comparison with antibiotic-supplemented birds (ANT) on performance, mortality, carcass yield, and microflora spectrum of the digestive tract was studied. The body weight of birds at 42 days was 2.2, 2.5, 2.4 and 2.4 kg, in the CON, ANT, LAB + MOS and LAB + MOS + FUA groups, respectively (P≤0.01). No significant differences between the body weights in the antibioticsupplemented (ANT) and experimental groups were found. Bird mortality in the CON, ANT, LAB+MOS and LAB+MOS+FUA groups was 2.7, 0.0, 0.7 and 0.7%, respectively. Compared with the control group, use of the antibiotic or other additives increased feed intake by 0.49 kg/bird, on average. Dressing percentage averaged 73.5% and was significantly higher in the experimental groups (P≤0.05). The weight of cold carcasses averaged 1.8 kg and was significantly lower in group CON (P≤0.01). The pH of the digestive tract did not differ among groups. LAB and MOS with or without FA increased significantly (P≤0.05) the counts of Streptococcus (P≤0.01) and Lactobacillus in the ileal digesta. The Streptococcus and Escherichia coli counts in the caecal digesta decreased significantly (P≤0.01). No Salmonella, Shigella and Campylobacter were found in the small intestine or caecum of any of the groups.

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Growth performance and immune response of two commercial broiler strains fed diets containing Lactobacillus cultures and oxytetracycline under heat stress conditions

Cited by 279 publications

References 30 publications

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

Overcrowding stress decreases macrophage activity and increasesSalmonellaEnteritidis invasion in broiler chickens

A Trial to Prevent Salmonella Enteritidis Infection in Broiler Chickens Using Autogenous Bacterin Compared with Probiotic Preparation

The effects of lactic acid bacteria and mannan oligosaccharide, with or without fumaric acid, on chicken performance, slaughter yield and digestive tract microflora

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