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Biabani N, Taherpour K, Ghasemi HA, Akbari Gharaei M, Hafizi M, Nazaran MH. Dietary advanced chelate technology-based 7-mineral supplement improves growth performance and intestinal health indicators during a mixed Eimeria challenge in broiler chickens. Vet Parasitol 2024; 331:110277. [PMID: 39094330 DOI: 10.1016/j.vetpar.2024.110277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2024] [Revised: 07/09/2024] [Accepted: 07/29/2024] [Indexed: 08/04/2024]
Abstract
The health and productivity of broilers may be improved by optimizing the availability and levels of trace minerals (TM) in their feed, especially in the presence of parasites. This study investigated the effects of replacing inorganic TM (ITM) with an advanced chelate technology-based 7 TM (ACTM) on performance, hematology, lesion score, oocyst shedding, gut morphology, and tight junction structure in broilers challenged with mixed Eimeria species. There were 480 1-day-old broiler chickens divided into 5 groups: uninfected negative control and recommended levels of ITM (NC); infected positive control and recommended levels of ITM (PC); or PC supplemented with salinomycin (SAL); PC diet with 50 % ACTM instead of ITM (ACTM50); or PC diet with 100 % ACTM instead of ITM (ACTM100). All groups, except NC, were orally challenged with mixed Eimeria spp. oocysts on day 14. Each group had 6 replicate cages, with 16 birds per replicate. The results showed that the NC, SAL, and ACTM100 groups had higher (P < 0.05) body weight, average daily gain (ADG), and European production efficiency index (EPEI), as well as a lower (P < 0.05) feed conversion, mortality rate, and heterophile to lymphocyte ratio compared to the PC group, with the NC group having the highest ADG and EPEI throughout the experiment. The SAL and ACTM100 groups had lower (P < 0.05) intestinal lesion scores and oocyst numbers compared to the PC group, although all coccidiosis-challenged groups had higher oocyst shedding compared to the NC group. On day 24, the challenged birds in the SAL and ACTM100 groups had higher (P < 0.05) villus height and surface area in the duodenum and ileum, as well as a higher (P < 0.05) villus height to crypt depth ratio in the jejunum. The expression levels of jejunal CLDN1 and ZO-1 were also higher (P < 0.05) in the ACTM100 and SAL groups compared to the PC and ACTM50 groups at 24 days of age. In conclusion, while using ACTM in broiler diets at 50 % of the commercial recommended levels maintained performance and physiological responses, complete replacement with ACTM improved growth performance and intestinal health characteristics, similar to salinomycin under Eimeria challenge conditions.
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Affiliation(s)
- Nasim Biabani
- Department of Animal Science, Faculty of Agriculture, Ilam University, Ilam, Iran
| | - Kamran Taherpour
- Department of Animal Science, Faculty of Agriculture, Ilam University, Ilam, Iran.
| | - Hossein Ali Ghasemi
- Department of Animal Science, Faculty of Agriculture and Environment, Arak University, Arak 38156-8-8349, Iran.
| | | | - Maryam Hafizi
- Department of Research and Development, Sodour Ahrar Shargh Company, Tehran, Iran
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Zaheer T, Abbas RZ, Imran M, Abbas A, Butt A, Aslam S, Ahmad J. Vaccines against chicken coccidiosis with particular reference to previous decade: progress, challenges, and opportunities. Parasitol Res 2022; 121:2749-2763. [PMID: 35925452 PMCID: PMC9362588 DOI: 10.1007/s00436-022-07612-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Accepted: 07/24/2022] [Indexed: 11/29/2022]
Abstract
Chicken coccidiosis is an economically significant disease of commercial chicken industry accounting for losses of more than £10.4 billion (according to 2016 prices). Additionally, the costs incurred in prophylaxis and therapeutics against chicken coccidiosis in developing countries (for instance Pakistan according to 2018 prices) reached US $45,000.00 while production losses for various categories of chicken ranges 104.74 to US $2,750,779.00. The infection has been reported from all types of commercial chickens (broiler, layer, breeder) having a range of reported prevalence of 7-90%. The concern of resistance towards major anticoccidials has provided a way forward to vaccine research and development. For prophylaxis of chicken coccidiosis, live virulent, attenuated, ionophore tolerant strains and recombinant vaccines have been extensively trialed and commercialized. Eimeria antigens and novel vaccine adjuvants have elicited the protective efficacy against coccidial challenge. The cost of production and achieving robust immune responses in birds are major challenges for commercial vaccine production. In the future, research should be focused on the development of multivalent anticoccidial vaccines for commercial poultry. Efforts should also be made on the discovery of novel antigens for incorporation into vaccine designs which might be more effective against multiple Eimeria species. This review presents a recap to the overall progress against chicken Eimeria with particular reference to previous decade. The article presents critical analysis of potential areas for future research in chicken Eimeria vaccine development.
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Affiliation(s)
- Tean Zaheer
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan
| | - Rao Zahid Abbas
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan.
| | - Muhammad Imran
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan
| | - Asghar Abbas
- Faculty of Veterinary Science, Muhammad Nawaz Shareef University of Agriculture Multan, Multan, Pakistan
| | - Ali Butt
- Department of Parasitology, University of Agriculture, Faisalabad, Pakistan
| | - Sarfraz Aslam
- Institute of Physiology, Pharmacology and Pharmaceutics, University of Agriculture, Faisalabad, Pakistan
| | - Jameel Ahmad
- Institute of Physiology, Pharmacology and Pharmaceutics, University of Agriculture, Faisalabad, Pakistan
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3
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Flores RA, Nguyen BT, Cammayo PLT, Võ TC, Naw H, Kim S, Kim WH, Na BK, Min W. Epidemiological investigation and drug resistance of Eimeria species in Korean chicken farms. BMC Vet Res 2022; 18:277. [PMID: 35836230 PMCID: PMC9284840 DOI: 10.1186/s12917-022-03369-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 06/30/2022] [Indexed: 11/20/2022] Open
Abstract
Background Coccidiosis is a poultry disease that occurs worldwide and is caused by Eimeria species. The infection is associated with reduced feed efficiency, body weight gain, and egg production. This study aimed to investigate the current status of coccidiosis and anticoccidial resistance to anticoccidial drugs used as part of control strategies for this disease in Korean chicken farms. Results An overall prevalence of 75% (291/388) was found. Positive farms contained several Eimeria species (mean = 4.2). Of the positive samples, E. acervulina (98.6%), E. maxima (84.8%), and E. tenella (82.8%) were the most prevalent species. Compared with cage-fed chickens, broilers and native chickens reared in free-range management were more at risk of acquiring an Eimeria infection. Sensitivities to six anticoccidial drugs (clopidol, diclazuril, maduramycin, monensin, salinomycin, and toltrazuril) were tested using nine field samples. Compared with untreated healthy control chickens, the body weight gains of infected chickens and treated/infected chickens were significantly reduced in all groups. Fecal oocyst shedding was significantly reduced in four clopidol-treated/infected groups, three diclazuril-treated/infected groups, two toltrazuril-treated/infected groups, one monensin-treated/infected group, and one salinomycin-treated/infected group, compared with the respective untreated/infected control groups. Intestinal lesion scores were also reduced in three clopidol-treated/infected groups, one monensin-treated/infected group, and one toltrazuril-treated/infected group. However, an overall assessment using the anticoccidial index, percent optimum anticoccidial activity, relative oocyst production, and reduced lesion score index found that all field samples had strong resistance to all tested anticoccidial drugs. Conclusion The results of this large-scale epidemiological investigation and anticoccidial sensitivity testing showed a high prevalence of coccidiosis and the presence of severe drug resistant Eimeria species in the field. These findings will be useful for optimizing the control of coccidiosis in the poultry industry. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03369-3.
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Affiliation(s)
- Rochelle A Flores
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Binh T Nguyen
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Paula Leona T Cammayo
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Tuấn Cường Võ
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Haung Naw
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Suk Kim
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Woo H Kim
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Byoung-Kuk Na
- Department of Parasitology and Tropical Medicine, Department of Convergence Medical Science, and Institute of Health Sciences, Gyeongsang National University College of Medicine, Jinju, 52727, Republic of Korea
| | - Wongi Min
- College of Veterinary Medicine & Institute of Animal Medicine, Gyeongsang National University, Jinju, 52828, Republic of Korea.
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4
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Cervantes HM, McDougald LR. The use of Anticoccidial Sensitivity Tests (ASTs) by the Poultry Industry. Avian Dis 2022; 66:1-5. [DOI: 10.1637/21-00110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 11/28/2021] [Indexed: 11/05/2022]
Affiliation(s)
| | - L. R. McDougald
- Department of Poultry Science, University of Georgia, Athens, GA 30602
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5
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Vereecken M, Dehaeck B, Rathinam T, Schelstraete W, De Gussem K, Chapman HD. Restoration of the sensitivity of Eimeria acervulina to anticoccidial drugs in the chicken following use of a live coccidiosis vaccine. Vet Parasitol 2021; 292:109416. [PMID: 33773363 DOI: 10.1016/j.vetpar.2021.109416] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 03/11/2021] [Accepted: 03/14/2021] [Indexed: 11/30/2022]
Abstract
The efficacy of the anticoccidial drugs amprolium, clopidol, diclazuril, monensin, monensin + nicarbazin, narasin, narasin + nicarbazin, and salinomycin against field isolates of Eimeria acervulina obtained from a commercial broiler enterprise before and after immunization with a coccidiosis vaccine was investigated. Evaluated by weight gain, feed conversion, and lesion score following challenge, the isolate obtained before vaccination was resistant to all the drugs tested. By contrast, after vaccination the isolate was sensitive to all drugs evaluated by weight gain, and to most drugs judged by feed conversion and lesion score. It is concluded that vaccination had resulted in the restoration of sensitivity to these drugs.
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Affiliation(s)
- M Vereecken
- Huvepharma N.V., Uitbreidingstraat 80, 2600, Antwerp, Belgium.
| | - B Dehaeck
- Huvepharma N.V., Uitbreidingstraat 80, 2600, Antwerp, Belgium
| | - T Rathinam
- Huvepharma Inc, 525 Westpark Drive, Peachtree City, GA 30269, USA
| | - W Schelstraete
- Huvepharma N.V., Uitbreidingstraat 80, 2600, Antwerp, Belgium
| | - K De Gussem
- Huvepharma N.V., Uitbreidingstraat 80, 2600, Antwerp, Belgium
| | - H D Chapman
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
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6
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Restoration of anticoccidial sensitivity to a commercial broiler chicken facility in Canada. Poult Sci 2020; 100:663-674. [PMID: 33518120 PMCID: PMC7858156 DOI: 10.1016/j.psj.2020.10.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2020] [Revised: 10/04/2020] [Accepted: 10/19/2020] [Indexed: 11/22/2022] Open
Abstract
Increasing resistance of Eimeria species to anticoccidial medications is an issue in the broiler chicken industry. Using drug-sensitive strains in live-coccidiosis vaccines has been shown to improve anticoccidial effectiveness in US-based broiler production. In Canada, litter is removed between flocks, which differ from the US industry practice. Thus, we investigated the use of drug-sensitive vaccine strains in a Canadian broiler production facility with suspected anticoccidial resistance. Weekly fecal samples were collected from flocks before, during, and after vaccine seeding to determine oocyst shedding patterns; following the vaccine seeding, OPG counts from similar aged birds were lower than flocks before live-coccidiosis vaccine use. Eimeria species isolates, collected before and after vaccine seeding, were used in 2 anticoccidial sensitivity tests to evaluate their susceptibility to commercially available anticoccidial medications; a low-dose challenge to define parasite replication, and a high-dose challenge to monitor broiler performance. In both experiments, isolates collected after seeding were more susceptible to almost every anticoccidial medication evaluated compared with the isolates collected before seeding. These results demonstrate an improvement in sensitivity to many anticoccidials after the use of live-coccidiosis vaccines at this facility. However, the regulated removal of litter at the end of each flock required under Canadian broiler chicken production management rules could limit the establishment of vaccine-strain Eimeria species in broiler facilities and could shorten the longevity of improved drug sensitivity observed in this study.
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7
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Abstract
Four floor pen studies were carried out to evaluate the effects of nicarbazin (NIC) administration on blood glucose concentrations and the onset of hypoglycemia in broiler chickens. All tests involved continuous NIC feeding at 0, 100, or 125 ppm to 28 days of age. In each study, birds were reared at both standard environmental temperatures and at 3 C below this level. In addition, two studies were conducted in the presence of coccidial infection and two were carried out in noninfected broilers. At 26 days of age in each test, two birds per pen were bled by puncture of the brachial vein, and whole blood glucose concentrations were determined. Results indicated that the administration of NIC to broilers for 26 days had no effect on blood glucose concentrations, although graded levels of NIC tended to increase these values. In addition, no evidence of hypoglycemia was recorded in any of the trials. In a similar fashion, blood glucose was unaffected by environmental temperature and coccidial challenge. These findings support previous work showing that NIC administration does not influence blood glucose levels and indicate that the product is not involved when field diagnoses use reduced blood glucose and hypoglycemia as indicators of production anomalies.
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Affiliation(s)
- K W Bafundo
- A Phibro Animal Health Corporation, Teaneck, NJ 07666
| | - M J da Costa
- B Department of Poultry Science, University of Georgia, Athens, GA 30602
| | - G M Pesti
- B Department of Poultry Science, University of Georgia, Athens, GA 30602
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8
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Jenkins MC, Parker CC, O'Brien CN, Ritter D. Viable Eimeria oocysts in poultry house litter at the time of chick placement. Poult Sci 2019; 98:3176-3180. [PMID: 30953077 DOI: 10.3382/ps/pez147] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 03/11/2019] [Indexed: 11/20/2022] Open
Abstract
The purpose of this study was to determine if Eimeria oocysts recovered from litter at the time of chick placement in commercial broiler houses contained oocysts that were infectious for chickens. Over 100 litter samples were collected from 30 poultry farms representing a total of 60 different broiler houses with 9 houses sampled more than once over 1.5 yr. The samples were collected just before the placement of newly hatched chicks and after an anticoccidial drug (ACD) or Eimeria vaccine (VAC) program, and processed for counting oocysts followed by Eimeria species determination using ITS1 PCR. Broiler chicks were inoculated with recovered Eimeria oocysts to determine if the litter oocysts were viable and capable of causing patent infection. At placement, E. maxima (Emax) oocysts were detected in 70 of 75 houses after ACD program and 46 of 47 houses after VAC program. Eimeria acervulina, E. praecox, and/or E. tenella (Eapt) were detected in 75 of 75 houses after ACD program and 47 of 47 houses after VAC program. Viability testing revealed that 33.0% of broiler houses contained viable Emax oocysts, while 46.9% contained viable Eapt oocysts. During VAC programs, the concentration of Emax oocysts at placement and the total number of Emax oocysts shed by chickens in viability studies showed a very strong correlation (r = 0.83). Likewise, during ACD programs, the concentration of Eapt oocysts at placement and the total number of Eapt oocysts shed by chickens in the viability study showed a strong correlation (r = 0.62). In general, Eimeria oocyst levels at placement and number of viable oocysts shed by chickens in the viability study were similar among houses on the same farm. However, the number of Eimeria oocysts shed in the viability studies was considerably less than expected based on the number of oocysts given. These data suggest that nearly 100% of all poultry houses contain Emax and Eapt oocysts at placement with 30 to 50% of the houses containing viable Eimeria oocysts, thus possibly representing a source of the protozoa to newly hatched chicks.
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Affiliation(s)
- M C Jenkins
- Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, NEA, ARS, USDA, Building 1040, BARC-EAST, Beltsville, MD 20705, USA
| | - C C Parker
- Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, NEA, ARS, USDA, Building 1040, BARC-EAST, Beltsville, MD 20705, USA
| | - C N O'Brien
- Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, NEA, ARS, USDA, Building 1040, BARC-EAST, Beltsville, MD 20705, USA
| | - D Ritter
- Mountaire Farms, Inc., Millsboro, DE 19966, USA
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9
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Noack S, Chapman HD, Selzer PM. Anticoccidial drugs of the livestock industry. Parasitol Res 2019; 118:2009-2026. [PMID: 31152233 PMCID: PMC6611755 DOI: 10.1007/s00436-019-06343-5] [Citation(s) in RCA: 132] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 04/29/2019] [Indexed: 12/11/2022]
Abstract
Coccidiosis is a parasitic disease of a wide variety of animals caused by coccidian protozoa. The coccidia are responsible for major economic losses of the livestock industry. For example, the annual cost due to coccidiosis to the global poultry industry has been estimated to exceed US$ 3 billion annually. Currently available drugs for the control of this disease are either polyether ionophorous antibiotics that are derived from fermentation products, or synthetic compounds, produced by chemical synthesis. Unfortunately, no new drugs in either category have been approved for use for decades. Resistance has been documented for all those of the drugs currently employed and therefore the discovery of novel drugs with unique modes of action is imperative if chemotherapy is to remain the principal means to control this disease. This chapter aims to give an overview of the efficacy and mode of action of the current compounds used to control coccidiosis in livestock and provides a brief outlook of research needs for the future.
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Affiliation(s)
- Sandra Noack
- Boehringer Ingelheim Vetmedica GmbH, Ingelheim am Rhein, Germany
| | - H David Chapman
- Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA
| | - Paul M Selzer
- Boehringer Ingelheim Vetmedica GmbH, Ingelheim am Rhein, Germany.
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10
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Wajiha, Qureshi NA, Afridi R. Comparative analysis of egg adapted vaccines and salinomycin against coccidiosis in chicks. Microb Pathog 2018; 123:454-460. [PMID: 30086345 DOI: 10.1016/j.micpath.2018.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/03/2018] [Accepted: 08/04/2018] [Indexed: 11/24/2022]
Abstract
Avian coccidiosis is an intestinal protozoan parasitic disease of genus Eimeria. Wide use of anticoccidial drugs has resulted in development of drug resistant strains. Current study is based upon the development of egg adapted vaccines; gametocytes, formalin inactivated and formalin inactivated sonicated gametocytes against coccidiosis. Day old chicks (n = 90) were divided into six groups (A-F) with triplicate. On 5th day of age, three groups were orally given developed vaccines (0.2 ml) while on 21st day groups (A-E) were challenged orally with mixed Eimeria spp (60-70,000 oocysts/chick). The comparative effect of vaccines and drug salinomycin was evaluated on basis of different parameters. Blood, liver and caecal tissues were collected on 5th, 7th and 15th day post infection for indirect hemagglutination test, biochemical analysis and histopathology. Significantly higher body weight gain, feed consumption, mild bloody diarrhea with lowest oocyst count and survival rate of 100% was recorded for gametocytes vaccinated group (P < 0.05). Indirect hemagglutination test showed maximum antibodies titer (IgG) in gametocytes vaccinated group. Present investigation revealed that gametocyte vaccines was significantly effective in control of coccidiosis by inducing strong protection in immune chicks contained high level of antibodies that resisted heavy dose of challenge as compared to anticoccidial drug salinomycin.
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Affiliation(s)
- Wajiha
- Department of Animal Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | | | - Rabia Afridi
- Department of Animal Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
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11
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Wealleans A, Li W, Romero L, Mathis G, Lumpkins B. Performance and cost-benefit improvements following supplementation with a combination of direct-fed microbials and enzymes to broiler chickens raised with or without ionophores. J APPL POULTRY RES 2018. [DOI: 10.3382/japr/pfx036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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12
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Recombinant anticoccidial vaccines - a cup half full? INFECTION GENETICS AND EVOLUTION 2017; 55:358-365. [DOI: 10.1016/j.meegid.2017.10.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 10/06/2017] [Accepted: 10/07/2017] [Indexed: 12/27/2022]
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13
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da Costa M, Bafundo K, Pesti G, Kimminau E, Cervantes H. Performance and anticoccidial effects of nicarbazin-fed broilers reared at standard or reduced environmental temperatures. Poult Sci 2017; 96:1615-1622. [DOI: 10.3382/ps/pew475] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 01/18/2017] [Indexed: 11/20/2022] Open
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14
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Jenkins MC, Parker C, Ritter D. EimeriaOocyst Concentrations and Species Composition in Litter from Commercial Broiler Farms During Anticoccidial Drug or LiveEimeriaOocyst Vaccine Control Programs. Avian Dis 2017; 61:214-220. [DOI: 10.1637/11578-010317-reg.1] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Mark C. Jenkins
- Animal Parasitic Diseases Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705
| | - Carolyn Parker
- Animal Parasitic Diseases Laboratory, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705
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15
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Barrios MA, Da Costa M, Kimminau E, Fuller L, Clark S, Pesti G, Beckstead R. Relationship Between Broiler Body Weights, Eimeria maxima Gross Lesion Scores, and Microscores in Three Anticoccidial Sensitivity Tests. Avian Dis 2017; 61:237-241. [DOI: 10.1637/11518-102116-reg.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Miguel A. Barrios
- Poultry Science Department, The University of Georgia, Athens, GA 30602
| | - Manuel Da Costa
- Poultry Science Department, The University of Georgia, Athens, GA 30602
| | - Emily Kimminau
- Poultry Science Department, The University of Georgia, Athens, GA 30602
| | - Lorraine Fuller
- Poultry Science Department, The University of Georgia, Athens, GA 30602
| | - Steven Clark
- Zoetis, 100 Campus Drive, Florham Park, NJ 07932
| | - Gene Pesti
- Poultry Science Department, The University of Georgia, Athens, GA 30602
| | - Robert Beckstead
- Poultry Science Department, The University of Georgia, Athens, GA 30602
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16
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Djemai S, Mekroud A, Jenkins MC. Evaluation of ionophore sensitivity of Eimeria acervulina and Eimeria maxima isolated from the Algerian to Jijel province poultry farms. Vet Parasitol 2016; 224:77-81. [PMID: 27270394 DOI: 10.1016/j.vetpar.2016.04.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 04/23/2016] [Accepted: 04/26/2016] [Indexed: 11/18/2022]
Abstract
The present study represents the first description of ionophore resistance in recovered from commercial Algerian (Jijel-Algeria) broiler farms. Microscopy and intervening transcribed sequence 1 PCR (ITS1 PCR) revealed only 2 Eimeria species present in litter from these farms- namely Eimeria acervulina and Eimeria maxima. A pool of these isolates were evaluated in broiler chickens (Cobb 500) for sensitivity to 5 anticoccidial compounds-diclazuril (1ppm), lasalocid (125ppm), monensin (125ppm), narasin (70ppm) and salinomycin (60ppm). As indicated by anticoccidial sensitivity profiles based on lesion scores and anticoccidial index (ACI), complete resistance to monensin and narasin, partial resistance to salinomycin and lasalocid, and complete sensitivity to diclazuril was observed. While lack of sensitivity to monensin is not surprising given its use for years as the sole anticoccidial compound, the resistance to monoether (narasin) and polyether (lasalocid) ionophores suggests that cross-resistance has developed in a segment of the Eimeria population. The fairly uniform Eimeria species composition among all poultry farms suggests that E. acervulina and E. maxima more rapidly develop resistance to ionophore drugs.
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Affiliation(s)
- Samir Djemai
- Laboratory, P.A.D.E.S.C.A, University of Constantine, Algeria.
| | | | - Mark C Jenkins
- Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, ARS, USDA, Beltsville, MD 20705, USA.
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Chapman HD, Jeffers TK. Restoration of sensitivity to salinomycin in Eimeria following 5 flocks of broiler chickens reared in floor-pens using drug programs and vaccination to control coccidiosis. Poult Sci 2015; 94:943-6. [PMID: 25796273 DOI: 10.3382/ps/pev077] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/16/2015] [Indexed: 11/20/2022] Open
Abstract
Five successive flocks of broilers were reared in floor-pens and given different drug programs or were vaccinated against coccidiosis. Oocysts of Eimeria were isolated from the litter of pens during the fifth flock and their sensitivity to salinomycin (Sal) investigated by measuring new oocyst production following infection of medicated and unmedicated birds. Parasites obtained following 5 flocks given Sal were not well-controlled and it was concluded that they were partially resistant to the drug. Parasites obtained following 4 unmedicated flocks and one medicated flock were better controlled by Sal and it was concluded that in the absence of continuous medication there had been an improvement in drug efficacy. Sal almost completely suppressed oocyst production of isolates from treatments in which medication was followed by vaccination, indicating that when a drug program is followed by vaccination, restoration of sensitivity to Sal had occurred.
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Affiliation(s)
- H D Chapman
- Department of Poultry Science, University of Arkansas, Fayetteville 72701
| | - T K Jeffers
- Department of Poultry Science, Cornell University, Ithaca NY 14853
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Transfection of Eimeria mitis with yellow fluorescent protein as reporter and the endogenous development of the transgenic parasite. PLoS One 2014; 9:e114188. [PMID: 25490541 PMCID: PMC4260837 DOI: 10.1371/journal.pone.0114188] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 11/05/2014] [Indexed: 12/05/2022] Open
Abstract
Background Advancements have been made in the genetic manipulation of apicomplexan parasites. Both the in vitro transient and in vivo stable transfection of Eimeria tenella have been developed successfully. Herein, we report the transient and stable transfection of Eimeria mitis. Methods and Findings Sporozoites of E. mitis transfected with enhanced yellow fluorescent protein (EYFP) expression plasmid were inoculated into chickens via the cloacal route. The recovered fluorescent oocysts were sorted by fluorescence activated cell sorting (FACS) and then passaged 6 generations successively in chickens. The resulting population was analyzed by genome walking and Western blot. The endogenous development of the transgenic E. mitis was observed and its reproduction potential was tested. The stable transfection of E. mitis was developed. Genome walking confirmed the random integration of plasmid DNA into the genome; while Western blot analysis demonstrated the expression of foreign proteins. Constitutive expression of EYFP was observed in all stages of merogony, gametogony and sporogony. The peak of the transgenic oocyst output was delayed by 24 h and the total oocyst reproduction was reduced by 7-fold when compared to the parental strain. Conclusion Stable transfection of E. mitis was successfully developed. The expression of foreign antigens in the transgenic parasites will facilitate the development of transgenic E. mitis as a vaccine vector.
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Chapman HD, Jeffers TK. Vaccination of chickens against coccidiosis ameliorates drug resistance in commercial poultry production. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2014; 4:214-7. [PMID: 25516830 PMCID: PMC4266793 DOI: 10.1016/j.ijpddr.2014.10.002] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 10/07/2014] [Accepted: 10/13/2014] [Indexed: 11/24/2022]
Abstract
Drug resistance is a problem wherever livestock are raised under intensive conditions and drugs are used to combat parasitic infections. This is particularly true for the anticoccidial agents used for the prevention of coccidiosis caused by protozoa of the apicomplexan genus Eimeria in poultry. Resistance has been documented for all the dozen or so drugs approved for use in chickens and varying levels of resistance is present for those currently employed. A possible solution may be the introduction of drug-sensitive parasites into the houses where poultry are raised so that they may replace such drug-resistant organisms. This can be achieved by utilizing live vaccines that contain strains of Eimeria that were isolated before most anticoccidial compounds were introduced. Such strains are inherently drug-sensitive. Practical proposals to achieve this objective involve the alternation of vaccination with medication (known as rotation programs) in successive flocks reared in the same poultry house. A proposal for a yearly broiler production cycle involving chemotherapy and vaccination is presented. There are few, if any, examples in veterinary parasitology where it has proved possible to restore sensitivity to drugs used to control a widespread parasite. Further research is necessary to ascertain whether this can result in sustainable and long-term control of Eimeria infections in poultry.
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Affiliation(s)
- H David Chapman
- Department of Poultry Science, University of Arkansas, Fayetteville, AR 72701, USA
| | - Thomas K Jeffers
- Department of Animal Science, Cornell University, Ithaca, NY 14853, USA
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Jenkins MC, O'Brien CN, Fuller L, Mathis GF, Fetterer R. A rapid method for determining salinomycin and monensin sensitivity in Eimeria tenella. Vet Parasitol 2014; 206:153-8. [PMID: 25312355 DOI: 10.1016/j.vetpar.2014.09.017] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 09/17/2014] [Accepted: 09/21/2014] [Indexed: 10/24/2022]
Abstract
Standard methods of determining the ionophore sensitivity of Eimeria rely on infecting chickens with an isolate or a mixture of Eimeria spp. oocysts in the presence of different anti-coccidial drugs. The purpose of this study was to develop a rapid in vitro method for assessing salinomycin and monensin sensitivity in Eimeria tenella. Cultures of MDBK cells were grown to 85% confluency, and then inoculated with excysted E. tenella laboratory strain (APU-1) sporozoites in the presence of different concentrations of salinomycin or monensin. At various timepoints, the monolayers were fixed for counting intraceullar sporozoites, or were subjected to DNA extraction, followed by molecular analysis using quantitative (qPCR) or semi-quantitative PCR (sqPCR). Preliminary experiments showed that 24h was the optimum time for harvesting the E. tenella-infected cell cultures. The average number of E. tenella sporozoites relative to untreated controls displayed a linear decrease between 0.3 and 33.0 μg/ml salinomycin and between 0.3 and 3.3 μg/ml monensin. A similar pattern was observed in the relative amount of E. tenella DNA as measured by sqPCR. A linear decrease in the relative amount of E. tenella DNA was observed over the entire range of salinomycin and monensin concentrations as measured by qPCR possibly reflecting the greater sensitivity of this assay. Comparison of sporozoite counting, sqPCR, and qPCR signals using a criterion of 50% inhibition in sporozoite numbers or level of PCR amplification product showed good agreement between the three assays. E. tenella field isolates (FS-1 and FS-2) displaying resistance to salinomycin and monensin were evaluated in the in vitro assay using qPCR and sqPCR. Compared to E. tenella APU-1, the E. tenella FS-1 and FS-2 isolates showed higher levels of E. tenella DNA at 24h by both qPCR and sqPCR. This in vitro assay represents a significant advance in developing rapid, cost-effective methods for assessing ionophore sensitivity in E. tenella.
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Affiliation(s)
- M C Jenkins
- Animal Parasitic Diseases Laboratory, Building 1040, Agricultural Research Service, USDA, Beltsville, MD 20705, United States.
| | - C N O'Brien
- Animal Parasitic Diseases Laboratory, Building 1040, Agricultural Research Service, USDA, Beltsville, MD 20705, United States
| | - L Fuller
- Department of Poultry Science, College of Agricultural and Environmental Sciences, University of Georgia, Athens, GA 30602, United States
| | - G F Mathis
- Southern Poultry Research, Inc., 96 Roquemore Road, Athens, GA 30607, United States
| | - R Fetterer
- Animal Parasitic Diseases Laboratory, Building 1040, Agricultural Research Service, USDA, Beltsville, MD 20705, United States
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Gocsik É, Kortes HE, Lansink AGJMO, Saatkamp HW. Effects of different broiler production systems on health care costs in the Netherlands. Poult Sci 2014; 93:1301-17. [PMID: 24879680 PMCID: PMC7107195 DOI: 10.3382/ps.2013-03614] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This study analyzed the effects of different broiler production systems on health care costs in the Netherlands. In addition to the conventional production system, the analysis also included 5 alternative animal welfare systems representative of the Netherlands. The study was limited to the most prevalent and economically relevant endemic diseases in the broiler farms. Health care costs consisted of losses and expenditures. The study investigated whether higher animal welfare standards increased health care costs, in both absolute and relative terms, and also examined which cost components (losses or expenditures) were affected and, if so, to what extent. The results show that health care costs represent only a small proportion of total production costs in each production system. Losses account for the major part of health care costs, which makes it difficult to detect the actual effect of diseases on total health care costs. We conclude that, although differences in health care costs exist across production systems, health care costs only make a minor contribution to the total production costs relative to other costs, such as feed costs and purchase of 1-d-old chicks.
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Affiliation(s)
- É Gocsik
- Business Economics Group, Wageningen University, Hollandseweg 1, 6706 KN Wageningen, the Netherlands
| | - H E Kortes
- Business Economics Group, Wageningen University, Hollandseweg 1, 6706 KN Wageningen, the Netherlands
| | - A G J M Oude Lansink
- Business Economics Group, Wageningen University, Hollandseweg 1, 6706 KN Wageningen, the Netherlands
| | - H W Saatkamp
- Business Economics Group, Wageningen University, Hollandseweg 1, 6706 KN Wageningen, the Netherlands
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Drăgan L, Györke A, Ferreira JFS, Pop IA, Dunca I, Drăgan M, Mircean V, Dan I, Cozma V. Effects of Artemisia annua and Foeniculum vulgare on chickens highly infected with Eimeria tenella (phylum Apicomplexa). Acta Vet Scand 2014; 56:22. [PMID: 24731599 PMCID: PMC3998236 DOI: 10.1186/1751-0147-56-22] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 04/05/2014] [Indexed: 11/22/2022] Open
Abstract
Background Intensive poultry production systems depend on chemoprophylaxis with anticoccidial drugs to combat infection. A floor-pen study was conducted to evaluate the anticoccidial effect of Artemisia annua and Foeniculum vulgare on Eimeria tenella infection. Five experimental groups were established: negative control (untreated, unchallenged); positive control (untreated, challenged); a group medicated with 125 ppm lasalocid and challenged; a group medicated with A. annua leaf powder at 1.5% in feed and challenged; and a group treated with the mixed oils of A. annua and Foeniculum vulgare in equal parts, 7.5% in water and challenged. The effects of A. annua and oil extract of A. annua + F. vulgare on E. tenella infection were assessed by clinical signs, mortality, fecal oocyst output, faeces, lesion score, weight gain, and feed conversion. Results Clinical signs were noticed only in three chickens from the lasalocid group, six from the A. annua group, and nine from the A. annua + F. vulgare group, but were present in 19 infected chickens from the positive control group. Bloody diarrhea was registered in only two chickens from A. annua group, but in 17 chickens from the positive control group. Mortality also occurred in the positive control group (7/20). Chickens treated with A. annua had a significant reduction in faecal oocysts (95.6%; P = 0.027) and in lesion score (56.3%; P = 0.005) when compared to the positive control. At the end of experiment, chickens treated with A. annua leaf powder had the highest body weight gain (68.2 g/day), after the negative control group, and the best feed conversion (1.85) among all experimental groups. Conclusions Our results suggest that A. annua leaf powder (Aa-p), at 1.5% of the daily diet post-infection, can be a valuable alternative for synthetic coccidiostats, such as lasalocid.
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Abstract
SUMMARYCoccidiosis, a serious disease resulting from infection with parasitic protozoa of the genusEimeria, causes significant economic losses to the poultry industry, where intensive rearing facilitates transmission of infectious oocysts via the fecal/oral route. Current control relies primarily on prophylactic drugs in feed but, whilst cost effective, the rise of drug resistance and public demands for residue-free meat has encouraged development of alternative control strategies. Chickens that recover from infection withEimeriadevelop solid immunity that is directed against the early asexual stages of the parasite life cycle. This has allowed development of a number of vaccines that utilize deliberate infection with controlled doses of virulent oocysts or reproductively attenuated lines ofEimeria.The latter are immunogenic but non-pathogenic. The realization that both prophylactic drugs and attenuated vaccines control but do not eradicate infection withEimeriaencouraged development of a vaccine based upon maternal immunity. Laying hens exposed toEimeriaare able to transfer protective antibodies to hatchlings via egg yolks and these antibodies have been used to identify parasite proteins that are conserved across the genus. When delivered maternally, these provide an economical means of preventing coccidiosis, offering immediate protection to newly hatched chicks.
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Chapman HD, Barta JR, Blake D, Gruber A, Jenkins M, Smith NC, Suo X, Tomley FM. A selective review of advances in coccidiosis research. ADVANCES IN PARASITOLOGY 2014; 83:93-171. [PMID: 23876872 DOI: 10.1016/b978-0-12-407705-8.00002-1] [Citation(s) in RCA: 167] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Coccidiosis is a widespread and economically significant disease of livestock caused by protozoan parasites of the genus Eimeria. This disease is worldwide in occurrence and costs the animal agricultural industry many millions of dollars to control. In recent years, the modern tools of molecular biology, biochemistry, cell biology and immunology have been used to expand greatly our knowledge of these parasites and the disease they cause. Such studies are essential if we are to develop new means for the control of coccidiosis. In this chapter, selective aspects of the biology of these organisms, with emphasis on recent research in poultry, are reviewed. Topics considered include taxonomy, systematics, genetics, genomics, transcriptomics, proteomics, transfection, oocyst biogenesis, host cell invasion, immunobiology, diagnostics and control.
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Affiliation(s)
- H David Chapman
- Department of Poultry Science, University of Arkansas, Fayetteville, Arkansas, USA.
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Lee KW, Lillehoj HS, Jang SI, Lee SH, Bautista DA, Donald Ritter G, Lillehoj EP, Siragusa GR. Comparison of live Eimeria vaccination with in-feed salinomycin on growth and immune status in broiler chickens. Res Vet Sci 2013; 95:110-4. [PMID: 23465765 DOI: 10.1016/j.rvsc.2013.02.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 01/30/2013] [Accepted: 02/01/2013] [Indexed: 10/27/2022]
Abstract
Coccidiosis vaccines and anticoccidial drugs are commonly used to control Eimeria infection during commercial poultry production. The present study was conducted to compare the relative effectiveness of these two disease control strategies in broiler chickens in an experimental research facility. Birds were orally vaccinated with a live, attenuated vaccine (Inovocox), or were provided with in-feed salinomycin (Bio-Cox), and body weights, serum levels of nitric oxide (NO) and antibodies against Eimeria profilin and Clostridium perfringens PFO proteins, and intestinal levels of cytokine gene transcripts were measured. Vaccinated chickens had increased body weights, greater NO levels, and higher profilin and PFO antibody levels compared with salinomycin-fed birds. Transcripts for interleukin-6 (IL-6), tumor necrosis factor superfamily 15, and interferon-γ were increased, while mRNAs for IL-4 and IL-10 were decreased, in immunized chickens compared with salinomycin-treated chickens. In conclusion, vaccination against avian coccidiosis may be more effective compared with dietary salinomycin for increasing body weight and augmenting pro-inflammatory immune status during commercial poultry production.
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Affiliation(s)
- Kyung-Woo Lee
- Animal Parasitic Diseases Laboratory, Animal and Natural Resources Institute, Agricultural Research Service, USDA, Beltsville, MD 20705, United States
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Salinomycin as a drug for targeting human cancer stem cells. J Biomed Biotechnol 2012; 2012:950658. [PMID: 23251084 PMCID: PMC3516046 DOI: 10.1155/2012/950658] [Citation(s) in RCA: 241] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 10/04/2012] [Indexed: 12/17/2022] Open
Abstract
Cancer stem cells (CSCs) represent a subpopulation of tumor cells that possess self-renewal and tumor initiation capacity and the ability to give rise to the heterogenous lineages of malignant cells that comprise a tumor. CSCs possess multiple intrinsic mechanisms of resistance to chemotherapeutic drugs, novel tumor-targeted drugs, and radiation therapy, allowing them to survive standard cancer therapies and to initiate tumor recurrence and metastasis. Various molecular complexes and pathways that confer resistance and survival of CSCs, including expression of ATP-binding cassette (ABC) drug transporters, activation of the Wnt/β-catenin, Hedgehog, Notch and PI3K/Akt/mTOR signaling pathways, and acquisition of epithelial-mesenchymal transition (EMT), have been identified recently. Salinomycin, a polyether ionophore antibiotic isolated from Streptomyces albus, has been shown to kill CSCs in different types of human cancers, most likely by interfering with ABC drug transporters, the Wnt/β-catenin signaling pathway, and other CSC pathways. Promising results from preclinical trials in human xenograft mice and a few clinical pilote studies reveal that salinomycin is able to effectively eliminate CSCs and to induce partial clinical regression of heavily pretreated and therapy-resistant cancers. The ability of salinomycin to kill both CSCs and therapy-resistant cancer cells may define the compound as a novel and an effective anticancer drug.
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Rambozzi L, Renna M, Cornale P, Perona G, Malfatto V, Mimosi A. Effect of the granulometric characteristics of monensin sodium on controlling experimental coccidiosis in broiler chickens. ACTA ACUST UNITED AC 2012; 21:60-4. [PMID: 22534947 DOI: 10.1590/s1984-29612012000100012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Accepted: 09/02/2011] [Indexed: 11/21/2022]
Abstract
The aim of the present study was to investigate the efficacy of monensin sodium grain size on controlling coccidiosis in broiler chickens. Three hundred and fifty Cobb 700 chicks were infected experimentally with 8 × 10(4) sporulated oocysts of Eimeria spp. The birds were fed with diets supplemented with powdered (n = 150) or granulated (n = 150) monensin, with particle sizes of ≤ 100 µm and 450-650 µm, respectively. The remaining chicks (n = 50) were used as an unmedicated control group. The birds' weights and number of oocysts per gram of litter in each group were recorded weekly. A total of 96 birds were randomly selected and culled during the trial. Their intestinal oocyst counts and lesion scores were determined. No significant differences in body weights were found between the groups at the end of the study. The percentages of infected animals, oocyst counts and lesion scores were significantly higher in the control group than in the other two groups; the two treated groups did not show any appreciable differences to each other. Enteritis was observed in 14 birds, all in the group supplemented with granulated monensin. These results suggest that powdered and granulated monensin have comparable efficacy in controlling coccidiosis in broiler chickens. However, treatments with monensin sodium of high grain size may be subject to contraindications relating to enteritis.
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Affiliation(s)
- Luisa Rambozzi
- Dipartimento di Produzioni Animali, Epidemiologia ed Ecologia, Sezione Parassitologia, Università degli Studi di Torino, Via L. da Vinci 44, 10095 Grugliasco, TO, Italy.
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Jenkins MC, Parker C, Klopp S, O'Brien C, Miska K, Fetterer R. Gel-Bead Delivery of Eimeria oocysts protects chickens against coccidiosis. Avian Dis 2012; 56:306-9. [PMID: 22856186 DOI: 10.1637/9940-092111-reg.1] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Vaccines composed of either virulent or attenuated Eimeria spp. oocysts have been developed as an alternative to medication of feed with ionophore drugs or synthetic chemicals. The purpose of this study was to evaluate the use of gel-beads containing a mixture of Eimeria acervulina, Eimeria maxima, and Eimeria tenella oocysts as a vaccine against coccidiosis. Newly hatched chicks (Gallus gallus domesticus) were either sprayed with an aqueous suspension of Eimeria oocysts or were allowed to ingest feed containing Eimeria oocysts-incorporated gel-beads. Control day-old chicks were given an equivalent number of Eimeria oocysts (10(4) total) by oral gavage. After 3 days, chicks were randomly assigned to individual cages, and feces were collected between days 5 and 8 postinfection. All samples were processed for total Eimeria oocysts. At 4 wk of age, all chickens and a control nonimmunized group received a high-dose E acervulina, E maxima, and E. tenella challenge infection. Oocyst excretion by chicks fed gel-beads or inoculated by oral gavage was 10- to 100-fold greater than that of chicks spray-vaccinated with the Eimeria oocysts mixture (log 6.3-6.6 vs. log 4.8). Subsequent protection against challenge as measured by weight gain and feed conversion efficiency was significantly greater (P < 0.05) in gel-bead and oral gavage groups compared with spray-vaccinated or nonimmunized groups. Also, gel-bead and oral gavage groups showed no significant difference (P > 0.05) in weight gain and feed conversion efficiency compared with nonchallenged controls. These findings indicate that incorporation of Eimeria spp. oocysts in gel-beads may represent an effective way to deliver live oocyst vaccines to day-old chicks for preventing subsequent outbreaks of coccidiosis in the field.
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Affiliation(s)
- Mark C Jenkins
- Animal Parasitic Diseases Laboratory, Beltsville Agricultural Research Center, Unites States Department of Agriculture, Agricultural Research Service, Beltsville, MD 20705, USA.
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Zhang DF, Xu H, Sun BB, Li JQ, Zhou QJ, Zhang HL, Du AF. Adjuvant effect of ginsenoside-based nanoparticles (ginsomes) on the recombinant vaccine against Eimeria tenella in chickens. Parasitol Res 2012; 110:2445-53. [DOI: 10.1007/s00436-011-2784-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Accepted: 12/13/2011] [Indexed: 10/14/2022]
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Zhao Y, Wang C, Lu Y, Amer S, Xu P, Wang J, Lu J, Bao Y, Deng B, He H, Qin J. Prokaryotic expression and identification of 3-1E gene of merozoite surface antigen of Eimeria acervulina. Parasitol Res 2011; 109:1361-5. [DOI: 10.1007/s00436-011-2381-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 04/06/2011] [Indexed: 11/30/2022]
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