Antibacterial properties of phytochemicals in aromatic plants in poultry diets.

Cross, D.E.; Hillman, K.; Fenlon, D.R.; Deans, Stanley G.; McDevitt, R. M.; Acamovic, T.; Stewart, C. S.; Pennycott, T. W.

doi:10.1079/9780851996141.0175

Cited by 8 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thymol has been shown to reduce the numbers of coliforms within the digesta from chickens from about 1·10 10 /g to about 1·10 8 . 5 /g (Cross et al 2004). Thymol has also been demonstrated to reduce fermentation by micro-organisms from the GIT in chickens (Shanmugavelu et al 2004), although other work has demonstrated little effect of a mixture of essential oil components (Lee et al 2003).…”

Section: Essential Oilsmentioning

confidence: 99%

“…However, more recently, the beneficial effects of PSM in animals (and man) have also been investigated (Douglas et al 1995;Kinghorn & Kennelly, 1997;Pfannhauser et al 2001;Cross et al 2004;James et al 2004;Nash, 2004;Bento et al 2005). A classic example of a compound that was initially considered as problematic when consumed by animals is mimosine.…”

Section: Phytochemicals: Effects In Animalsmentioning

confidence: 99%

See 1 more Smart Citation

Biochemistry of plant secondary metabolites and their effects in animals

2005

Self Cite

View full text Add to dashboard Cite

Plant secondary metabolites, which include a wide variety of phytochemicals, have always been constituents of the diets of man and other animals. Although a high proportion of these phytochemicals have been considered to be of little value in plants (although this view is changing), they have frequently been shown to have adverse effects on animals when ingested. The effects depend to a great extent on the chemistry of the compounds, their concentration in the diet and the amount consumed, and are further dependent on the health status of the animals. Traditionally, most studies of the effects of these compounds on animals have focused on their adverse effects and how to alleviate them. However, recent public concern about the use of synthetic compounds in animal diets to enhance performance and health and welfare issues, coupled with changes in regulations on the use of synthetic medicaments, has stimulated interest and research in the use and effects of phytochemicals in the diets of farmed animals. Phytochemicals vary in their chemistry but can be divided into hydrophilic and hydrophobic compounds, of which a wide variety of polyphenolic and terpenoid compounds, as well as alkaloids, carbohydrates and non-protein amino acids, invoke special interest. The chemistry, biochemistry and mechanisms of action of these compounds in plants and their effects in animals when ingested will be explored. Phytochemicals: Effects in animalsAs plant secondary metabolites (PSM) are an extremely large group of compounds, a comprehensive overview of their biochemistry, bioactivity and chemistry is not possible in a relatively short review paper. The importance of PSM in ecology, human foods and animal feeds, and as pharmaceuticals with chemical and biochemical attributes has already been described in some detail

show abstract

Section: Essential Oilsmentioning

confidence: 99%

Section: Phytochemicals: Effects In Animalsmentioning

confidence: 99%

Biochemistry of plant secondary metabolites and their effects in animals

2005

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, although the antibacterial activity of thyme has been demonstrated in many destinations, the purpose of the recent study is to evaluate the use of thyme in poultry diet as a reducing agent of E. coli population in gastrointestinal system as well as the possible improvement of growth indices and meat contamination reduction. Concerning thyme effects on the gastrointestinal microflora, few reports are available (21,26). Cross et al (26) showed that thymol as essential oil extracted from thyme can significantly reduce the total number of coliform bacteria in the gastrointestinal tract.…”

Section: Discussionmentioning

confidence: 99%

“…Concerning thyme effects on the gastrointestinal microflora, few reports are available (21,26). Cross et al (26) showed that thymol as essential oil extracted from thyme can significantly reduce the total number of coliform bacteria in the gastrointestinal tract. Also, Tschirch (21) stated that carvacrol as one component of thyme essential oil had a positive effect on the growth and proliferation of intestinal lactobacillus species.…”

Section: Discussionmentioning

confidence: 99%

The effect of thyme (Thymus daenensis) supplement on growth and hygienic parameters of broilers meat

Gholami‐Ahangaran¹,

Sichani²,

Sadeghi³

et al. 2019

IJVS

View full text Add to dashboard Cite

The antibacterial effect of Thyme species was relatively approved but the effect of this plant on bacterial population of intestine in chickens and consequently on bacterial load of chicken meat following administration of thyme was not investigated. For evaluation of thyme effect on growth indices, microbial contamination of meat and microbial population of cecal content, 180 broiler chicks were divided into 4 equal groups with 3 replicates and were reared until 42 days. Chickens in different groups were treated with different doses of thyme (0, 0.25, 0.50 and 1 percent) in diets. The weight gain, feed consumption and feed conversion rate were calculated weekly. In the end of 42 days old, all chickens were slaughtered. The population of Escherichia coli per gram of cecal contents and contamination of meat with Escherichia coli were assayed. The data showed that supplement of 0. 5 and 1 percent of thyme to diet elevated weight gain and decreased feed conversion rate. Furthermore, addition of 0.5 and 1 percent of thyme to diet can decrease microbial population of cecal content and meat. In conclusion, the addition of thyme to diet may improve growth rate and hygienic parameters in chicken meat.

show abstract

“…The beneficial effects of garlic in the diet are evident and may indicate an antimicrobial effect in vivo. However, longer periods of dietary garlic inclusion (>10-20d) may affect the meat flavour as a strong odour was detectable in the hens [Cross et al, 2004].…”

Section: Antiviral Propertiesmentioning

confidence: 99%

Study on the assessment of plants/herbs, plant/herb extracts and their naturally or synthetically produced components as ‘additives’ for use in animal production

Vienna

Graz

Hohenheim

et al. 2007

EFS3

View full text Add to dashboard Cite

A As ss se es ss sm me en nt t o of f p pl la an nt ts s/ /h he er rb bs s a an nd d e ex xt tr ra ac ct ts s I In nt tr ro od du uc ct ti io on n 5 5 M Mo on no og gr ra ap ph hs s o of f t th he e f fo ol ll lo ow wi in ng g s sp pe ec ci ie es s: : FOREWORDIn September 2003 the European Parliament and the Council of the European Union adopted the Regulation No. 1831/2003 on additives for use in animal nutrition. The purpose of this regulation is to establish a Community procedure for authorising the placing on the market and use of feed additives and to lay down rules for the supervision and labelling of feed additives and premixtures in order to provide the basis for the assurance of a high level of protection of human health, animal health and welfare, environment, and "users and consumers" interests in relation to feed additives, whilst ensuring the effective functioning of the internal market. Under the current regulation detailed guidelines for some family of products are completely missing, that it is the case of the plants/herbs, plant/herb extracts and their naturally or synthetically produced components. For this reason it is one of the priorities of the FEEDAP Panel to implement guidelines/guidance for these types of compounds.It has been observed that plant/herbs and their extracts are increasingly being used (and informally marketed) not only as sensory additives, but also for other purposes not covered by the legislation, notably better growth or feed conversion, improved meat quality, and for prophylactic purposes. There are strong indications that such use will further increase as replacement additives for the antibiotic growth promoters whose use will be prohibited by the end of 2005.Nowadays, a compiled list of these compounds or extracts does not exists although the European Federation of Animal Feed Additive Manufacturers (FEFANA) notes that some 280 plant extracts and a further 1700 chemically defined compounds have been used within Member States as sensory additives in animal feeds.The results of this study will be used by EFSA, in consultation with the European Commission, Member States and other stakeholders, to provide input for the development of guidance/guidelines documents for the authorisation of plants/herbs, plant/herb extracts and their naturally or synthetically produced components for use in animal nutrition. ASSESSMENT OF PLANTS/HERBS, PLANT/HERB EXTRACTS AND THEIR NATURALLY OR SYNTHETICALLY PRODUCED COMPONENTS AS "ADDITIVES" FOR USE INTRODUCTIONThe last two decades have seen a substantial increase in use of herbs/botanicals and their products not only as herbal medicinal products and for food supplements, but also in the field of animal nutrition. The use of herbal feed additives, which include essential oils and (exotic) herbal mixtures, is extensively promoted by the producers, but the scientific background underpinning their use often is limited. Consequently an adequate knowledge of quality control (content of active substance(s) stability), efficacy and safety is oft...

show abstract

Antibacterial properties of phytochemicals in aromatic plants in poultry diets.

Cited by 8 publications

References 0 publications

Biochemistry of plant secondary metabolites and their effects in animals

Biochemistry of plant secondary metabolites and their effects in animals

The effect of thyme (Thymus daenensis) supplement on growth and hygienic parameters of broilers meat

Study on the assessment of plants/herbs, plant/herb extracts and their naturally or synthetically produced components as ‘additives’ for use in animal production

Contact Info

Product

Resources

About