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forum.pigeonbasics.com/topic/17763-oregano-against-coccidiosis/:
is Origanum?
Origanum is a very well known herbalized plant, which has been scientifically selected and specially cultivated for it’s high levels of herbalized oils. The oils extracted from the Origanum herbal plant have shown great influential benefits in the health of most animals and birds, including pigeons.

The most significant property for a pigeon is it's ability to battle and control coccidiosis. OrigoMax a product based on the oils from the Origanum herb plant which shown excellent results in its ability to stop the disease and also preventing future outbreaks.

The Power of Nature:
Plants can offer the best route to new and exciting medicine and feed additives. When plants sense danger they resort to chemical warfare, defending themselves with a powerful arsenal of molecular missiles. These compounds vary according to the type of threat they face, whether infection, injury or an extreme change in temperature. For example, under intense ultraviolet light most plants protect their leaves by manufacturing potent antioxidants called flavonoids, or when attacked by fungi or bacteria other plants manufacture antimicrobial chemicals called phytoalexins. Different plants, living under different conditions produce chemical substances suitable to fight back attects from the surroundings, like UV light, fungus or parasites. By selecting the right plants, formulations suitable to combat also animal diseases can be made.

A Way Forward:
Pigeon fanciers all over the world are faced with a myriad of pathogens that can affect performance and health. In recent times some of the more common pathogens have been viruses such as Paramyxo virus, Herpes virus and Adeno virus, respiratory disease due to Chlamydia and Mycoplasma sp., parasites like Trichomonas, and coccidiosis and bacterial infections due to Salmonella sp., Clostrium sp. and E.coli. The presence of multiple infestations (viral, fungal, bacterial), without the symptoms, can indicate a compromised immune system and lead to imbalanced gut flora and digestive upsets, resulting in secondary infections.

A new product incorporating natural pure essential oil extracted from oregano is a new age tool used to assist pigeon fanciers. Scientists studied over 40 species of Origanum that grow wild. For each species and sub species they produced a unique biochemical map of the chemicals it contains within the essential oil derived from the flowers and leaf fractions, allowing for the creation and identification of a variety of active compounds.

Two of the chemicals present, in varying levels for each Origanum species, had structures and properties that are completely unrelated to existing antibiotics - a boon in the age of antibiotic resistant bacteria. The various wild species of Origanum contains two phenols, Carvacrol and Thymol - known antiseptic compounds. A specific type of Origanum vulgare ssp. hirtum is now being grown commercially. Each year a crop is harvested, with the resultant leaf and flower fractions subjected to a process of steam distillation, giving rise to a quantity of pure oil which is incorporated as the active component of OrigoMax.

This oil is highly effective against both gram-positive and gram-negative bacteria, especially against 2 strains of Escherischia coli and Staphylococcus aureus and against single strains of Salmonella typhimurium, Pseudomonas aeroginosa, Bacillus subtilis and Rhizobium leguminosum (Sivropoulou et al, 1996). These findings support the extensive body of research documenting the inhibitory effects of Carvacrol and Origanum sp. Carvacrol and oil of Origanum has been shown to possess antifungal activity against several Candida sp. with Minimum Inhibitory Concentrations (MIC) levels <0.1m g/ml (Stiles et al, 1995) and Cryptococcus neoformans (Viollon et al, 1994), and antimicrobial activity against the food-borne pathogen Bacillus subtilis (Ultee et al, 2000). Moreover, the complete essential oil extracted from Origanum vulgare ssp. hirtum and their phenols have also exhibited high cytotoxic activity against cell lines derived from human cancers (Lagouri et al, 1996), inactivation of Salmonella enteritidis (Koutsoumanis et al, 1999), and anticoccidial activity against Eimeria tenella, E. acervulina, E. necatrix, E. mivati and E. bruneti (Spais, 1998).Some very recent work has also highlighted some novel ancillary benefits of Origanum vulgare, including the treatment of, and prophylactic use against enteric parasites (Force et al, 2000; DeLuca et al, 1999), which provides a very interesting foundation for future additional research that is highly applicable to the poultry industry. What is of great significance is in contrast to antibiotic growth promoters, there is no evidence of bacterial resistance to oil of Origanum sp. (Ingram, 1997). Also the inhibitory effect of Origanum sp. on bacteria does not impact upon any chromosomal or extrachromosomal mechanisms, thus there is no risk of increasing the bacterial resistance to such important substances as penicillin, streptomycin, etc. The components of Origanum sp. are classified by the FDA as GRAS. Harnessing all of the research conducted on Origanum vulgare ssp. hirtum a revolutionary and leading edge product has evolved, incorporating 5 % of the pure essential oil extracted from this species, and is commercially available as OrigoMax.
 
Since you asked for studies, here are just a couple more on the use of plants and oregano on coccidiosis. Again, hope someone finds this useful!

· https://www.hindawi.com/journals/ecam/2016/2657981/ "Over 300,000 species of flowering plants have been recorded worldwide. So far, less than 1% of them have been explored for use against protozoan diseases [18]. In this section, a total of 68 plants and phytocompounds, which were scientifically tested for suppression of Eimeria species, are described and discussed [1, 9, 11, 12]. Table 1 lists 32 anticoccidial plants whose active compounds and modes of action need to be elucidated: Sophora flavescens (Fabaceae), Sinomenium acutum (Menispermaceae), Quisqualis indica (Combretaceae), Pulsatilla koreana (Ranunculaceae), Ulmus macrocarpa (Ulmaceae), Artemisia asiatica (Asteraceae), Gleditsia japonica (Fabaceae), Melia azedarach (Meliaceae), Piper nigrum (Piperaceae), Urtica dioica (Urticaceae), Artemisia sieberi (Asteraceae), Lepidium sativum (Brassicaceae), Foeniculum vulgare (Apiaceae), Morinda lucida (Rubiaceae), Commiphora swynnertonii (Burseraceae), Moringa oleifera (Moringaceae), Origanum spp. (Lamiaceae), Laurus nobilis (Lauraceae), Lavandula stoechas (Lamiaceae), Musa paradisiaca (Musaceae), Moringa stenopetala (Moringaceae), Solanum nigrum (Solanaceae), Mentha arvensis (Lamiaceae), Moringa indica (Moringaceae), Melia azadirachta (Meliaceae), Tulbaghia violacea (Amaryllidaceae), Vitis vinifera (Vitaceae), Artemisia afra (Asteraceae), Quercus infectoria (Fagaceae), Rhus chinensis (Anacardiaceae), and Terminalia chebula (Combretaceae). Details about active phytocompounds present in the other anticoccidial plants and their mechanisms are summarized in Tables 24."

· "In this section, the phytochemicals and plants, which suppress coccidiosis via intervention with the developmental stages of life cycle in Eimeria species in poultry, are discussed. They are summarized in Table 2. Their chemistry and mechanism of action of phytochemicals and plants are also described below and summarized in Table 2 and Figure 1."

· "2.1.3. Garlic (Allium sativum) and Allicin

Garlic and its sulfur compounds, allicin, alliin, ajoene, diallyl sulfide, dithiin, and allylcysteine, are reported to have broad antimicrobial activities which can eliminate negative factors of microbial infections. An in vitro study has shown that allicin inhibits sporulation of E. tenella effectively [2628]. The anticoccidial mechanism of garlic and its sulfur compounds remains elusive.



2.1.4. Selenium, Phenolics, and Green Tea (Camellia sinensis)

Green tea extracts have been shown to significantly inhibit the sporulation process of coccidian oocysts [29, 30]. Accordingly, the selenium and polyphenolic compounds in green tea are thought to be active compounds to inactivate the enzymes responsible for coccidian sporulation [29, 30].



2.1.5. N-3 Fatty Acids, Flavonoids, Vernoside, and Their Plant Sources

Upon the invasion of Eimeria sporozoites into the intestinal epithelium, reactive nitrogen species (RNS) and reactive oxygen species (ROS) are often produced by host cells, leading to the death of sporulating oocysts [21]. Similarly, another study demonstrated that the extracts from Berberis lyceum, in which berberine was enriched, inhibited the sporozoites of E. tenella in chickens via induction of oxidative stress. Other studies indicated that extracts from Linum usitatissimum [21], Ageratum conyzoides [31], and Vernonia amygdalina [32] controlled coccidian infection via induction of oxidative stress. Moreover, N-3 fatty acids, flavonoids, and vernoside were identified as active compounds present in L. usitatissimum, A. conyzoides, and V. amygdalina, respectively. These compounds were shown to elicit oxidative stress (Table 2). Oxidative stress is known to cause imbalance of oxidant or antioxidant species in the host and is often observed in a wide range of microbial and parasitic infections including coccidiosis [19]. Moreover, these natural extracts not only enhanced chicken growth but also had no noticeable toxicity.



2.1.6. Carica papaya and Papain

Two studies have reported that extracts from C. papaya leaves significantly inhibit coccidiosis [32, 33]. Little is known about the anticoccidial mechanism. Proteolytic destruction of Eimeria by papain and/or inflammatory suppression by vitamin A were proposed as possible mechanisms by which C. papaya and its active compounds acted to suppress coccidiosis [32, 33].



2.1.7. Saponin, Betaine, and Their Plant Sources

Hassan et al. demonstrated that dietary supplementation of guar bean (Cyamopsis tetragonoloba) suppressed coccidiosis in chickens [34]. This suppression was proposed to be achieved by saponins, presumably the active compounds, which bind with sterol molecules present on the cell membrane of the parasites [34]. Another study also reported that the extracts of M. cordifolia, M. citrifolia, and M. arboreus showed anticoccidial effects in chickens [35]. Saponins were presumed to be the active compounds which could lyse oocysts. In contrast, another report described betaine, an active compound isolated from beet or other plants, as contributing to the stabilization and protection of the epithelial cells in which Eimeria multiply [36].



2.1.8. Essential Oils and Their Plant Sources

Essential oils derived from plants showed inhibition of Eimeria species at different developmental stages (Figure 1). Essential oils are an important natural product resource, which are rich in many phytocompounds. Both in vitro and in vivo studies reported that essential oils can be used as feed additives in chickens to control coccidiosis [1, 11, 12]. Bioactive compounds present in the essential oils extracted from Oreganum compactum, A. absinthium, Rosmarinus officinalis, Anredera cordifolia, Morinda citrifolia, Malvaviscus arboreus, Syzygium aromaticum, Melaleuca alternifolia, Citrus sinensis, and Thymus vulgaris were able to destroy the parasites, including oocysts and sporozoites (Table 1).



2.1.9. Maslinic Acid

Maslinic acid, an active compound in the leaves and fruit of the olive tree (Olea europaea), was originally identified as a novel anticoccidial compound as indicated by the lesion index, the oocyst index, and the anticoccidial index [37]. However, its anticoccidial activity remains unknown.



2.1.10. Proanthocyanidin and Grape Seed

Proanthocyanidin is a naturally occurring polyphenolic antioxidant widely distributed in grape seed and other sources. Grape seed proanthocyanidin extract was shown to reduce E. tenella infection as shown by gut pathology, body weight, and mortality [38]. Accordingly, this extract decreased nitric oxide but increased superoxide dismutases in the plasma of chickens [38]. These data suggest that proanthocyanidin from grape seed diminishes coccidiosis via downregulation of oxidative stress.



2.1.11. Dichroa febrifuga

D. febrifuga, also known as Chang Shan, is a Chinese medicinal herb for protozoan diseases. Zhang and coworkers showed that crude extract of D. febrifuga was effective against E. tenella infection in chickens [39]. Febrifugine, an alkaloid, was isolated from this plant and its halogenated derivative, halofuginone, was developed as anticoccidial chemical [10].



2.2. Plants and Compounds That Modulate Host Immunity against Eimeria

· From an evolutionary point of view, birds have a complete immune system consisting of innate and adaptive immune responses [96]. Both immune responses are responsible for coccidial clearance and vaccine immunization [12, 97]. Medicinal plants often have immunomodulatory compounds which boost antimicrobial immune responses to uphold homeostasis of poultry health [91, 98]. Therefore, immunoregulatory plant extracts and compounds could be utilized as an alternative method to reinforce immune response against avian coccidiosis. Immunoregulatory phytochemicals for avian coccidiosis are described in Table 3 and Figure 2."

· PLANTS ARE NATURE'S REMEDIES

2.2.1. Arabinoxylans, Wheat (Triticum aestivum), and Sugar Cane (Saccharum officinarum)

Akhtar and colleagues showed that arabinoxylan, a bioactive compound from wheat bran, improved coccidiosis in chickens as indicated by body weight, oocyst count, and gut lesions [69]. In contrast, Awais and Akhtar reported that different extracts of sugar cane juice and bagasse protected against coccidiosis in chickens as shown by body weight gain, oocyst shedding, lesion score, and anticoccidial indices [99]. The data from both studies revealed that wheat bran arabinoxylan and sugar cane conferred host protection against Eimeria infection via natural and adaptive immune response. Cell-mediated immunity seemed to be a key factor in response to coccidiosis in chickens when compared to humoral immunity [69, 99].



2.2.2. Polysaccharides from Astragalus membranaceus Radix, Carthamus tinctorius, Lentinus edodes, and Tremella fuciformis

Guo and colleagues reported that the polysaccharides derived from the herb A. membranaceus Radix and the mushrooms L. edodes and T. fuciformis effectively controlled E. tenella infection in chickens [80]. Concurrent with the anticoccidial protection, the polysaccharides could enhance anticoccidial antibodies and antigen-specific cell proliferation in splenocytes via cellular and humoral immunity to E. tenella in chickens [80]. Their mechanism appeared to stimulate cell proliferation of the lymphocytes via regulation of DNA polymerase activity.



2.2.3. Cinnamaldehyde, Carvacrol, Capsicum Oleoresin, and Turmeric Oleoresin

Two phytonutrient mixtures, VAC (carvacrol, cinnamaldehyde, and Capsicum oleoresin) and MC (Capsicum oleoresin and turmeric oleoresin), were tested for coccidiosis in chickens [70]. The data proved that both combination treatments effectively protected against E. tenella infection. Moreover, both treatments exhibited an increase in NK cells, macrophages, CD4+ T cells, CD8+ T cells, and their cytokines (IFN-γ and IL-6) and a decrease in TNFSF15 and IL-17F, leading to induction and elevation of host immunity to kill E. tenella in chickens [70].



2.2.4. Aloe and Acemannan

Gadzirayi et al. showed that A. excelsa possesses anticoccidial activity in chickens [36, 43, 100, 101] despite lack of information about its mode of action and its active compound(s). Another study stated that aqueous and ethanolic extracts from A. vera mounted a cell-mediated immune response as well as a humoral response against coccidiosis in chickens. The immunomodulatory compounds could include aloe polysaccharide acemannan (Figure 2), which binds the mannose receptor on macrophages, stimulating them to produce inflammatory cytokines such as IL-1 through IL-6 and TNF-α and eventually suppress coccidiosis as shown by greater weight gain and lower fecal oocyst counts [72, 100].



2.2.5. Oriental Plum (Prunus salicina) and Phenolics

One report showed that dietary supplementation of plum fruit powder, rich in phenolic compounds, added to chicken feed significantly diminished E. acervulina infection in chickens as demonstrated by increased body weight gain and reduced fecal oocyst shedding [81]. Accordingly, plum fruit powder greatly augmented the transcription of IFN-γ and IL-15 and splenocyte proliferation, indicating that plum fruit can boost immune response to coccidiosis.



2.2.6. Mushroom (Fomitella fraxinea) and Lectin

One study showed that the lectin derived from a mushroom, F. fraxinea, protected chickens from Eimeria challenge via enhancement of both cellular and humoral immune responses [74]. This work also suggested that this mushroom could enhance both immune responses to Eimeria species in chickens. This study implies that immunoregulatory botanicals such as mushroom can improve poultry growth and development via immune protection from infectious pathogens and toxins. Moreover, botanicals, containing micro- and macronutrients, can increase growth performance in poultry.



2.2.7. Propyl Thiosulfinate and Propyl Thiosulfinate Oxide

One study showed that garlic compounds, propyl thiosulfinate (PTS) and propyl thiosulfinate oxide (PTSO), could alter the expression levels of 1,227 transcripts related to intestinal intraepithelial lymphocytes (IEL) in chickens. PTSO/PTS was shown to activate transcription factor, NF-κB, which plays a key role in regulating the immune response upon infection. Therefore, it seems that a combination of PTSO and PTS rendered chickens more resistant to experimental E. acervulina infection and augmented adaptive immunity, including a higher antibody response and greater splenocyte proliferation, compared with control chickens [75]. Another in vitro study showed that PTS could stimulate splenocyte proliferation and directly kill the sporozoites, pointing to the same conclusion [75].



2.2.8. Tannins and Chicoric Acid from Emblica officinalis and Echinacea purpurea

Tannins and chicoric acid, isolated from E. officinalis [77] and E. purpurea [102], respectively, were reported to effectively elicit humoral immune response against coccidial infection in chickens. However, the mechanism by which both compounds boost anticoccidial immunity is not clear.



2.3. Plants and Compounds That Possess Prebiotic Properties

Like in humans, gut microbiota are important for health and disease in poultry [103]. Gut microbiota perform multiple functions involved in nutrient digestion, gut development and growth, establishment/maintenance of the immune system, suppression of pathogenic microbes, microbial infections, and so forth [8, 104109]. Thus, promotion of beneficial microbes and reduction of harmful microbes contribute to growth performance and health in poultry [103]. Several studies have indicated that probiotics, containing one or multiple species of Lactobacillus, Enterococcus, and/or Bifidobacterium, can reduce coccidiosis and enhance growth performance in chickens [57, 97, 104, 110, 111]. Currently, little is known about the anticoccidial mechanisms of probiotics. These modes of action have been proposed: maintaining a healthy balance of bacteria by competitive exclusion and antagonism, promoting gut maturation and integrity, modulating immunity and preventing inflammation, altering metabolism by increasing digestive enzyme activity and decreasing bacterial enzyme activity and ammonia production, improving feed intake and digestion, and neutralizing enterotoxins and stimulating the immune system [91, 108]. On the other hand, coccidiosis is frequently accompanied by secondary bacterial infection [71, 105, 106, 112].



Prebiotics refer to nondigestible feed ingredients that promote the growth of probiotics and their activities in guts [113]. As illustrated in Table 4, the most common prebiotics, used in poultry, include inulin, arabinoxylooligosaccharides (AOS), fructooligosaccharides (FOS), mannan-oligosaccharides (MOS), xylooligosaccharides (XOS), isomaltooligosaccharides (IMOS), soy oligosaccharides (SOS), and pyrodextrins [92, 114]. These oligosaccharides are derived from the plants such as chicory, onion, garlic, asparagus, artichoke, leek, bananas, tomatoes, and wheat [92]. Dietary supplementation of these prebiotics to chicken feed has enhanced immune defence against pathogen infection and reduced the mortality rate [91, 115]. The mechanism of prebiotics is yet to be revealed, but they selectively stimulate beneficial bacteria in the intestinal system of the bird. The increasing number of beneficial microbiota excludes the harmful pathogens from colonization in the intestinal track of the bird. Subsequently, healthy hosts can produce a wide variety of bacterions and other immunomodulators that can stimulate macrophages to neutralize the pathogens [114]. Thus, prebiotic-mediated immunological changes may be partially due to direct interaction between prebiotics and gut immune cells as well as due to an indirect action of prebiotics via preferential colonization of probiotics and their products that interact with immune cells [85]. Therefore, prebiotics exert their functions mainly via increasing gut probiotics to suppress pathogens and boosting immune response in chickens to constrain gut pathogens [91]. Moreover, Bozkurt et al. reported that prebiotics diminished coccidial infection in chickens but kept marginal oocyst production that might serve as a source of live vaccine for uninfected chickens [116]. Two other publications emphasized that probiotics composed of Bifidobacterium animalis and Lactobacillus salivarius alleviated the detrimental impact of the Eimeria infection on chickens and improved growth performance [110, 111]. These findings suggest that prebiotics suppress coccidiosis plausibly via indirect regulation of increased probiotics and host immunity. Apparently, prebiotics share many similar anticoccidial mechanisms with probiotics. Overall, dietary supplementation of prebiotics is emerging as a novel approach to control coccidiosis.



2.4. Plants and Compounds with Multiple Mechanisms to Inhibit Coccidiosis

2.4.1. Curcumin and Curcuma longa

As described in Table 2, turmeric (C. longa) has long been used as a spice and medicinal herb. One publication stated that C. longa showed anticoccidial activity [67, 117]. Another reported that curcumin (diferuloylmethane), an active compound in C. longa, consistently destroyed sporozoites of E. tenella [118]. Similarly, a combination of A. annua and C. longa showed anticoccidial efficacy in broilers challenged with a mixture of E. acervulina and E. maxima [119]. In addition, curcumin was shown to enhance coccidiosis resistance as evidenced by increased BW gains and reduced oocyst shedding and gut lesions [21, 67]. Consistently, curcumin elevated host humoral immunity to Eimeria species and diminished gut damage in poultry [21, 67].



2.4.2. Polyacetylenes and Bidens pilosa

As described in Table 2, Yang et al. demonstrated that B. pilosa has exhibited anticoccidial activity in chickens infected with E. tenella as evidenced by survival rate, fecal oocyst count, gut pathology, body weight, and bloody stool [9]. Although the active compounds in B. pilosa responsible for anticoccidial action are unknown, this plant is a rich source of phytochemicals, such as 70 aliphatics, 60 flavonoids, 25 terpenoids, 19 phenylpropanoids, 13 aromatics, 8 porphyrins, and 6 other compounds [120]. Interestingly, one polyacetylene (1-phenyl-1,3-diyn-5-en-7-ol-acetate) and one flavonoid (quercetin-3,3-dimethoxy-7-0-rhamnoglucopyranose) in this plant have been proposed to be active compounds against the protozoan parasite, Plasmodium [121].



However, the identity of the active compounds needs to be further ascertained. The mechanism of B. pilosa and its active compounds is not clear. It is possible that this plant and its active compounds intervene in the initial phases of the Eimeria life cycle because the phases may be liable to chemical attack when compared with the oocyst whose wall is very resistant to physical and chemical insults. In addition, B. pilosa was shown to modulate host immunity [122], which might have impact on coccidiosis.



Compared to anticoccidial drugs, B. pilosa was shown to produce little or no drug resistance in Eimeria [9]. Botanicals developed low resistance in Eimeria probably because different compounds target multiple pathways related to drug resistance [9, 12].



It should be noted that the plant- and phytochemical-based remedies can be used per se or in combination with other anticoccidial agents. This idea was further confirmed by one publication indicating that Echinacea, an immunotherapeutic herbal extract, was used to boost the immunization efficacy in chickens in combination with anticoccidial vaccines [78].

· CONCLUSION AND PERSPECTIVES:

Coccidiosis is a deadly and debilitating infectious disease in poultry, which is caused by enteric protozoan parasites, Eimeria species, in the guts of birds. These parasites damage the guts of the birds, leading to moderate clinical symptoms such as sick bird appearance, bloody stool, hemorrhage, and gut lesions and death. Pathogens (Eimeria species, swallowed oocyst counts, etc.), host genetics, and environmental factors could influence the clinical outcome of avian coccidiosis. Current prophylaxis and therapy for coccidiosis comprise anticoccidial chemicals, vaccines, and natural products. Plants are a rich source of phytochemicals against coccidiosis. Here, we summarized the chemistry and biology of over 68 plants and compounds which prevented and treated avian coccidiosis via the regulation of the life cycle of Eimeria species and host immunity and gut microflora in experimental and field trail studies. Emphasis was placed on recent advances in the understanding of the potential of these plants and compounds to prevent and/or treat avian coccidiosis. Moreover, the actions, mechanisms, and therapeutic potential of these plant compounds and/or extracts in avian coccidiosis and new insights into the advantage of plant extracts and compounds that simultaneously regulate Eimeria, bacteria, and immune cells were discussed. Comprehensive information about the structure, activity, and modes of action of these compounds can aid research and development of anticoccidial remedies.
 
REFERENCES:
Competing Interests


· The authors declare that there are no competing interests regarding the publication of this paper.



· Authors’ Contributions


Thangarasu Muthamilselvan and Tien-Fen Kuo equally contributed to this study.



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· https://academic.oup.com/japr/article/21/3/630/724858
 
She still weighs 2.5 pounds. She's been eating, but I can't seem to get her to drink today. She's panting a lot like she's thirsty, but won't drink anything. Yesterday all she did was drink.
 

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