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Related Concept Videos

Giardiasis01:12

Giardiasis

Giardiasis is a globally prevalent intestinal infection caused by the protozoan parasite Giardia duodenalis (also known as G. lamblia or G. intestinalis). This flagellated protozoan is the most frequently identified intestinal parasite in the United States and worldwide. Transmission primarily occurs via the fecal-oral route, with infection arising from ingestion of water or food contaminated with cysts. Individuals in low-resource settings, international travelers, outdoor enthusiasts, daycare...

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Related Experiment Video

Updated: Jul 9, 2026

Loop-mediated Isothermal Amplification (LAMP) Assays for the Species-specific Detection of Eimeria that Infect Chickens
06:57

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Published on: February 20, 2015

Reduced intestinal absorption in broilers during Eimeria mitis infection

M D Ruff, S A Edgar

    American Journal of Veterinary Research
    |March 1, 1982
    PubMed
    Summary

    Eimeria mitis infection in broilers significantly reduced glucose and L-methionine absorption in the intestine, impacting nutrient uptake and growth. This malabsorption was dose-dependent and occurred without visible intestinal lesions.

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    Area of Science:

    • Avian health and nutrition
    • Parasitology
    • Gastrointestinal physiology

    Background:

    • Eimeria species are significant protozoan parasites affecting poultry.
    • Intestinal malabsorption can lead to reduced growth and economic losses in broiler chickens.
    • The impact of Eimeria mitis on nutrient absorption requires further elucidation.

    Purpose of the Study:

    • To quantify the effect of Eimeria mitis infection on glucose and L-methionine absorption in broiler chickens.
    • To determine the relationship between parasite dose and the severity of malabsorption.
    • To investigate the correlation between malabsorption and clinical signs.

    Main Methods:

    • Broiler chickens were inoculated with two strains of Eimeria mitis at different doses (50,000 and 500,000 sporulated oocysts).
    • Absorption of glucose and L-methionine was measured in different intestinal regions.
    • Plasma depigmentation, body weight, packed cell volume (PCV), and plasma protein were assessed.

    Main Results:

    • Glucose and L-methionine absorption were reduced by up to 52% in infected broilers compared to controls.
    • Malabsorption was more pronounced in the region of and caudad to the yolk sac diverticulum.
    • Higher oocyst doses led to greater malabsorption; plasma depigmentation was observed.
    • Infected birds exhibited reduced body weight, but PCV and plasma protein remained unaffected. No gross intestinal lesions were observed.

    Conclusions:

    • Eimeria mitis infection causes significant intestinal malabsorption of glucose and L-methionine in broilers.
    • The severity of malabsorption is dose-dependent and occurs despite the absence of gross pathological changes.
    • Reduced nutrient absorption contributes to decreased body weight in infected birds.