Temporal Effects of Lactic Acid Bacteria Probiotic Culture on Salmonella in Neonatal Broilers
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We evaluated the ability of a commercially available lactic acid bacteria-based probiotic culture (LAB) to reduce Salmonella Enteritidis or Salmonella Typhimurium in day-of-hatch broiler chicks. In these experiments, chicks were challenged with Salmonella Enteritidis or Salmonella Typhimurium and treated with LAB 1-h postchallenge. Following treatment, cecal tonsils and ceca were aseptically collected for Salmonella Enteritidis or Salmonella Typhimurium enrichment or Salmonella Enteritidis enumeration, respectively. In experiments 1 to 3, LAB significantly reduced the incidence of Salmonella Enteritidis (60 to 70% reduction) or Salmonella Typhimurium (89 to 95% reduction) recovered from the cecal tonsils of day-old broiler chicks 24 h following treatment as compared with controls (P < 0.05). Additionally, administration of LAB caused a >2.9 log10 reduction of total cecal Salmonella Enteritidis recovered 24 h following treatment as compared with controls (P < 0.05). In experiments 4 to 7, upon sample enrichment LAB significantly reduced the recovery of Salmonella Enteritidis from the cecal tonsils at 24 h, but not 6 or 12 h posttreatment (P < 0.05). However, in experiments 6 and 7, when total cecal Salmonella Enteritidis recovery was enumerated, a significant treatment-associated reduction was observed 12 h posttreatment, although in cecal tonsil samples there was no difference in Salmonella Enteritidis incidence at 12 h (P < 0.05). In these studies, LAB treatment significantly reduced recovery of Salmonella in day-of-hatch broilers.Keywords:
Salmonella enteritidis
Cecum
Objective To evaluate the diagnose and operation about the movement cecum syndrome.Methods To analyse clinical manifestations and what finned by operation of the movement cecum syndrom 16 cases,to summarize the issues of diagnose.To use a new operation method-accending colo,cecum shorten treates the movement cecum syndrome,observing the result of the treatment.Results 1 case was used with appendectomy,2 cases was treated with appendectomy and cecum fixxing,clinical manifestation do not disappear.13 cases was treated with appendectomy and accending colo、cecum,clinical manifestation disappear,the weight added.Result of the treament is good.Conclusion appendectomy colo,cecum shorten is a good methed for treating movement cecum syndrom.
Key words:
Cecal diseases ; Colorectal surgery
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R ecently, our health and wellbeing have been adversely affected by the abnormal increase in global temperature caused by climate change.Animal husbandry is therefore also influenced in numerous ways.This can be seen in the case of broiler chickens, which are particularly susceptible to heat stress because of their elevated metabolic activity and the absence of sweat glands.The adverse consequences of heat stress for broilers, such as impaired growth, diminished feed consumption, reduced feed efficiency, alterations in yield and quality of meat, heightened mortality, and compromised welfare, are extensively reported in the literature (Tabler et al., 2020;Quinteiro-Filho et al., 2010, 2012a).Emerging research provides evidence of heat stress impact on the morphological characteristics of the gastrointestinal tract, leading to reduced crypt depth, mucosal area, and villus height, with subsequent research
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A total of 400 day old chicks comprising of two groups (T1- Nandanam broiler-2 and T2 - Nanadanam broiler-3 chickens and) with four replicates of 50 chicks each and reared up to 8th week of age under intensive system. Production performance of birds was assessed based on biweekly bodyweight, feed conversion ratio and livability. The results revealed that there were no significant (P>0.05) differences observed in mean body weight (g) at initial growth periods, i.e., from 0-2 weeks of age between. Significantly higher (P£0.01) mean body weight (g) was observed in Nanadanam broiler-3 chickens from 4 to 8 weeks of age than Nandanam broiler-2 birds. Significantly better (P£0.01) cumulative feed conversion ratio was recorded in Nanadanam broiler-3 than Nandanam broiler-2 and per cent livability did not differ. It is concluded that Nanadanam broiler-3 chickens had significantly higher production performance than Nandanam broiler-2 birds under intensive system of management.
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1 Abstract: The effect of an organic acid mixture (OA) and a Lactobacillus-based probiotic culture on Salmonella enteritidis (SE) infection in broiler chicks was evaluated. In exp. 1, chicks were challenged by oral gavage with SE, held in chick boxes for 2 h and randomly assigned to either untreated control or continuous OA treatment in the drinking water. Crop and cecal tonsils were cultured at 48 h and 5 d post-challenge for recovery of SE. Recovery of SE in the crop and cecal tonsils at 48 h was significantly (p<0.05) lower in the OA treated group as compared to control chickens but not different at 5d. In exps.2 and 3, chicks were SE challenged, held in chick boxes for 2 h and randomly assigned to either untreated control, probiotic, OA, or probiotic+OA. After 24 or 48 h, crop and cecal tonsils were cultured for the presence or absence of SE. After 24 h, probiotic or probiotic+OA significantly reduced SE recovery from the crop as compared to controls. All treatments reduced SE recovery from the cecal tonsils at 24 h. While no significant differences were observed in SE recovery from crop at 48 h, SE recovery from probiotic and or probiotic+OA groups was significantly lower than the controls in the cecal tonsils. These data suggest that combination treatment with the selected OA and Lactobacillus-based probiotic culture is more effective than individual treatment for Salmonella reduction in chicks.
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Effects of heat stress on production efficiency in broiler chickens with experimental colibacillosis
The experiment was designed to investigate effects of 37℃ constant heat stress on production efficiency in broiler chickens with experimental colibacillosis and to give the theoretics basis for breeding broiler chickens with colibacillsis under high temperature.The results showed that: the heat stress and colibacillosis in broiler chickens all decreased significantly(P0.01) in feed intake.The feed intake of broiler chickens with colibacillsis decreased by 26.01%(P0.01) from 4 to 7 day under heat stress.The heat stress decreased significantly(P0.01) in body weight gain of broiler chickers.The body weight of broiler chickens with colibacillosis decreased significantly(P0.01).The body weight in broiler chickens with colibacillosis decreased by 348.58% in 7 days under heat stress.The conclusion: The heat stress decreased significantly in feed intake of broiler chickens with colibacillosis and severely affected its production efficiency.
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Gustafsson, B. E., Midtvedt, T. & Strandberg, K. 1970. Effects of Microbial Contamination on the Cecum Enlargement of Germfree Rats. Scand. J. Gastroent. 5, 309-314.Strips from germfree rat ceca were less sensitive to acetylcholine and serotonin than strips from conventional rats. Other smooth muscle organs of the germfree rat did not show a low muscular sensitivity to these agents. The effects of 'conventionalization' were different in young and old rats. Cecum contents were fully reduced in both age groups; cecum wall was fully reduced in young but only partially in old rats. The cecum muscular sensitivity remained unchanged in old but was 'conventionalized' in young rats. Monocontamination of germfree rats with Cl. difficile gave a partial reduction of the cecum contents and wall; the muscular sensitivity remained unchanged.
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The objective of the present study was to investigate the effect of supplemental probiotic preparation “Vetlactoflorum” on some hematological and biochemical constituents of blood in broiler chickens. One hundred fifty broiler chickens breed "Ross-308" used in one day old, divided into three groups of 50 chicks (control" un supplemented probiotic" , first treatment group received “Vetlactoflorum-C” and second treatment group received “Vetlactoflorum-M”). Samples were taken in 7, 14, 21, 28, 35 and 42 day-old. Experimental study conducted to determine whether supplementation of probiotic could improve the blood characteristics of broilers chickens, shown that these selected probioticorganisms are able to effect on hematological and biochemical aspects, and also some minerals in broiler chickens.
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Temperature conditions in broiler chicken should be 0-4 0 C in refrigerated broiler chicken and, in broiler chicken frozen for more than 4 months, -15 0 C to -20 0 C to avoid alterations of physico-chemical and organoleptic features. pH values in carcass broiler chicken varies depending on storage time and on the degree of freshness, ranging between 6.1-6.4 in relatively fresh frozen broiler chicken and 6.4-6.5 in de-frozen broiler chicken, reaching 5.8-6.1 in fresh broiler chicken. Microbiological and physico-chemical features are influenced by storage conditions in both storage units and retail units. Easily hydrolysable nitrogen reached, in all analysed samples, values between 19.53±0.38 and 21.14±0.18 in broiler chicken carcass and 18.88±0.24 in broiler chicken legs.
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