Coccidiosis Prevalence and Correlation with Intestinal Health of Broilers in Brazilian Agricultural Industries Between the Years 2012 and 2014

Gazoni, Fabio L.; Adorno, F.C.; Lovato, Maristela; Dilkin, Paulo; Hermes, S.; Magro, P.R.; Pacheco, Paulo Santana; Dalmagro, Marcelo R.; Felin, M. Renan; Hernandez, X.; Téllez, G.

doi:10.3923/ijps.2015.511.515

Cited by 4 publications

(2 citation statements)

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“…It is known that E. acervulina can develop resistance to anticoccidials at a faster rate, due to its high reproductive potential and short life cycle ( Williams, 2001 ; Chapman, et al, 2010 ). This behavior could explain the higher frequency of E. acervulina (35.0%) in all sampling areas of this study, as well as in the study by Haug et al (2008) in Norwey with 100%, Györke et al (2013) in Romania with 91%, and in the work by Gazoni et al (2015) in Brazil with 13.5%.…”

Section: Discussionsupporting

confidence: 63%

Survey of coccidia on commercial broiler farms in Colombia: frequency of Eimeria species, anticoccidial sensitivity, and histopathology

et al. 2021

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Avian coccidiosis continues to be one of the costliest diseases of commercial poultry. Understanding the epidemiology of Eimeria species in poultry flocks and the resistance profile to common anticoccidials is important to design effective disease prevention and control strategies. This study examined litter samples to estimate the prevalence and distribution of Eimeria species among broiler farms in 4 geographic regions of Colombia. A total of 245 litter samples were collected from 194 broiler farms across representative regions of poultry production between March and August 2019. The litter samples were processed for oocysts enumeration and speciation after sporulation. End-point polymerase chain reaction (PCR) analysis was conducted to confirm the presence of Eimeria species. Anticoccidial sensitivity was determined with 160 Ross AP males in 5 treatment groups: noninfected, nonmedicated control (NNC ), infected, nonmedicated control (INC), infected salinomycin treated (SAL, dose: 66 ppm) , infected diclazuril treated (DIC, dose: 1 ppm), and infected methylbenzocuate-Clopidol treated (MET.CLO, dose: 100 ppm), All birds were orally inoculated with 1 × 10 6 sporulated oocysts using a 1 mL syringe, except for the NNC- group who received 1ml of water . Eimeria spp. were found in 236 (96.3%) out of 245 individual houses, representing 180 (92.8%) out of 194 farms. Eimeria acervulina was the most prevalent species (35.0%) followed by Eimeria tenella (30.9%), Eimeria maxima (20.4%), and other Eimeria spp. (13.6%). However, mixed species infections were common, with the most prevalent combination being mixtures of E. acervulina, E. maxima, E. tenella, and other species in 31.4% of the Eimeria -positive samples. PCR analysis identified E. acervulina, E. maxima, E. tenella, Eimeria necatrix, Eimeria mitis, and Eimeria praecox with variable prevalence across farms and regions. Anticoccidial sensitivity testing of strains of Eimeria isolated from 1 region, no treatment difference ( P > 0.05) was observed in final weight (BW), weight gain (BWG) or feed conversion (FCR). For the global resistance index ( GI ) classified SAL and MET.CLO as good efficacy (85.79 and 85.49, respectively) and DIC as limited efficacy (74.52%). These results demonstrate the ubiquitous nature of Eimeria spp. and identifies the current state of sensitivity to commonly used anticoccidials in a region of poultry importance for Colombia.

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Section: Discussionsupporting

confidence: 63%

Survey of coccidia on commercial broiler farms in Colombia: frequency of Eimeria species, anticoccidial sensitivity, and histopathology

et al. 2021

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“…The intestinal lesions caused by E. acervulina, E. maxima, and E. tenella are considered the most important in the production of broiler chickens since they have been shown to cause the most significant impact on zootechnical indicators. Therefore, lesions in the intestine caused by these species are prioritized in intestinal health monitoring (Toledo et al 2011, Gazoni et al 2015, Gazoni et al 2017, Huang et al 2017. The histopathological analysis is used to assist in the diagnosis of macroscopic lesions in the intestine, which also helps to establish the severity of infection by Eimeria spp.…”

Section: Introductionmentioning

confidence: 99%

Comparison of macroscopy, histopathology and PCR for diagnosing Eimeria spp. in broiler chickens

Balestrin

Santiani

et al. 2022

Pesq. Vet. Bras.

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Coccidiosis is a disease of great importance in industrial poultry. The correct diagnosis directs the poultry industry to its best treatment and control. Thus, a survey of Eimeria spp. was carried out in intestines of 64 broiler flocks, with an average age of 29 days. Eight broilers from each flock were randomly removed from the slaughter line, in a total of 512 samples. Macroscopic and histopathological lesions in the intestine were classified into Scores 0 to 4. Polymerase chain reaction (PCR) was used to research the oocysts from the seven species of Eimeria spp. in the intestinal content. The macroscopic evaluations showed that 59.4% (38/64) of the flocks were positive for E. acervulina, 32.8% (21/64) for E. maxima, 29.7% (19/64) for E. tenella, and 34.4% (22/64) for E. brunetti. The histopathological evaluation showed that 87.5% (56/64) of the flocks had at least one broiler with parasitic structures compatible with Eimeria spp. in the duodenum, 70.3% (45/64) in the jejunum, 18.8% (12/64) in the ileum, 46.9% (30/64) in the cecum, and 4.7% (3/64) in the colon. In PCR, 21.9% (14/64) of the flocks were positive for E. acervulina, 12.5% (8/64) for E. maxima, 3.1% (2/64) for E. mitis, and 32.8% (21/64) for E. tenella. The Kappa Cohen test between macroscopy, histopathology, and PCR demonstrated concordance ranging from weak to moderate with the exception of histopathology and PCR of the cecum, which was strong. In the comparison between macroscopy and histopathology, there were significative differences between Scores 0 and 1 (apart from the cecum). For Score 3, there were significative differences in duodenum, jejunum and cecum (p<0.05). In conclusion, the macroscopic diagnosis and PCR can generate false-negative results, and the histopathological exam proved to be effective, making it essential to associate different techniques for the correct diagnosis of Eimeria spp. in broiler chickens.

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Correlation between intestinal health and coccidiosis prevalence in broilers in Brazilian agroindustries

Gazoni

Adorno²,

Matte³

et al. 2020

Parasitology International

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Coccidiosis Prevalence and Correlation with Intestinal Health of Broilers in Brazilian Agricultural Industries Between the Years 2012 and 2014

Cited by 4 publications

References 1 publication

Survey of coccidia on commercial broiler farms in Colombia: frequency of Eimeria species, anticoccidial sensitivity, and histopathology

Survey of coccidia on commercial broiler farms in Colombia: frequency of Eimeria species, anticoccidial sensitivity, and histopathology

Comparison of macroscopy, histopathology and PCR for diagnosing Eimeria spp. in broiler chickens

Correlation between intestinal health and coccidiosis prevalence in broilers in Brazilian agroindustries

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