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Experimental Infection with Sporulated Oocysts of Eimeria maxima (Apicomplexa: Eimeriidae) in Broiler.

Brito Lda S, Pereira EN, da Silva AA, Bentivóglio Costa Silva V, Freitas FL - J Vet Med (2014)

Bottom Line: Although the sum in meat production was higher in the control group, the weight of the heart and gizzard of the experimental animals showed no significant difference, while the liver had difference on day 5°, 15°, and 35° dpi.The pathologic evaluation showed congested mucosa and presence of large amounts of mucus at 6 dpi.Therefore, it is concluded that the dose of 5 × 10(4) E. maxima inoculated in the experimental group was enough to cause harm to the animal organism.

View Article: PubMed Central - PubMed

Affiliation: Anatomy Laboratory, Institute of Biotechnology and Health, Federal University of Amazonas, Road Coari/Mamia, n° 305, 69460-000 Coari, AM, Brazil.

ABSTRACT
Through this study we assessed the metabolic and pathological changes in broilers experimentally infected with oocysts of Eimeria maxima. To perform the experiment, we used 150 broiler strain cooB males, with ten days of age, were randomized according to weight and randomly assigned to two experimental groups: the control group was inoculated with 0.5 mL of distilled water; the infected group inoculated with 0.5 mL of solution containing 5 × 10(4) sporulated oocysts of Eimeria maxima. The live performance was evaluated on day 0 (day of inoculation), 5°, 10°, 15°, 25°, and 35° dpi, being slaughtered by cervical dislocation, fifteen birds/group. Although the sum in meat production was higher in the control group, the weight of the heart and gizzard of the experimental animals showed no significant difference, while the liver had difference on day 5°, 15°, and 35° dpi. The pathologic evaluation showed congested mucosa and presence of large amounts of mucus at 6 dpi. Therefore, it is concluded that the dose of 5 × 10(4) E. maxima inoculated in the experimental group was enough to cause harm to the animal organism.

No MeSH data available.


Related in: MedlinePlus

Meat Production Chart from the 5th to the 35th dpi, in terms of grams.
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Related In: Results  -  Collection


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fig3: Meat Production Chart from the 5th to the 35th dpi, in terms of grams.

Mentions: The prepatent period observed in this study differs from the results found by Zulpo [13], who studied the pathogenicity of strains of E. maxima, using a dose of 2 × 104 and who found a prepatent period of 168 hours (7 dpi). Idris et al. [12] also noted a prepatent period of 168 hours in chickens inoculated with 2.5 × 104 oocysts E. maxima. The lowest prepatency may be related to high excystation of sporozoites of E. maxima, according to Shiotani et al. [22]. At the end of the experiment, the control group produced 28.839 kg of meat, while the infected group produced 28.053 kg of meat (Figure 3). Silva et al. [23], evaluating the performance of broilers reared in environments with and without oocysts, observed a lower body weight and a lower feed at 14 days of life conversion. Already Persia et al. [24] reported that the coccidiosis infection can lead to a drop in performance due to decreased dietary metabolisable energy, and digestibility of amino acids.


Experimental Infection with Sporulated Oocysts of Eimeria maxima (Apicomplexa: Eimeriidae) in Broiler.

Brito Lda S, Pereira EN, da Silva AA, Bentivóglio Costa Silva V, Freitas FL - J Vet Med (2014)

Meat Production Chart from the 5th to the 35th dpi, in terms of grams.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4590854&req=5

fig3: Meat Production Chart from the 5th to the 35th dpi, in terms of grams.
Mentions: The prepatent period observed in this study differs from the results found by Zulpo [13], who studied the pathogenicity of strains of E. maxima, using a dose of 2 × 104 and who found a prepatent period of 168 hours (7 dpi). Idris et al. [12] also noted a prepatent period of 168 hours in chickens inoculated with 2.5 × 104 oocysts E. maxima. The lowest prepatency may be related to high excystation of sporozoites of E. maxima, according to Shiotani et al. [22]. At the end of the experiment, the control group produced 28.839 kg of meat, while the infected group produced 28.053 kg of meat (Figure 3). Silva et al. [23], evaluating the performance of broilers reared in environments with and without oocysts, observed a lower body weight and a lower feed at 14 days of life conversion. Already Persia et al. [24] reported that the coccidiosis infection can lead to a drop in performance due to decreased dietary metabolisable energy, and digestibility of amino acids.

Bottom Line: Although the sum in meat production was higher in the control group, the weight of the heart and gizzard of the experimental animals showed no significant difference, while the liver had difference on day 5°, 15°, and 35° dpi.The pathologic evaluation showed congested mucosa and presence of large amounts of mucus at 6 dpi.Therefore, it is concluded that the dose of 5 × 10(4) E. maxima inoculated in the experimental group was enough to cause harm to the animal organism.

View Article: PubMed Central - PubMed

Affiliation: Anatomy Laboratory, Institute of Biotechnology and Health, Federal University of Amazonas, Road Coari/Mamia, n° 305, 69460-000 Coari, AM, Brazil.

ABSTRACT
Through this study we assessed the metabolic and pathological changes in broilers experimentally infected with oocysts of Eimeria maxima. To perform the experiment, we used 150 broiler strain cooB males, with ten days of age, were randomized according to weight and randomly assigned to two experimental groups: the control group was inoculated with 0.5 mL of distilled water; the infected group inoculated with 0.5 mL of solution containing 5 × 10(4) sporulated oocysts of Eimeria maxima. The live performance was evaluated on day 0 (day of inoculation), 5°, 10°, 15°, 25°, and 35° dpi, being slaughtered by cervical dislocation, fifteen birds/group. Although the sum in meat production was higher in the control group, the weight of the heart and gizzard of the experimental animals showed no significant difference, while the liver had difference on day 5°, 15°, and 35° dpi. The pathologic evaluation showed congested mucosa and presence of large amounts of mucus at 6 dpi. Therefore, it is concluded that the dose of 5 × 10(4) E. maxima inoculated in the experimental group was enough to cause harm to the animal organism.

No MeSH data available.


Related in: MedlinePlus