Eimeria tenella infections in chickens: aspects of host-parasite: interaction

Jeurissen, S.H.M.; Janse, E.M.; Vermeulen, A.N.; Vervelde, Lonneke

doi:10.1016/s0165-2427(96)05689-9

Cited by 53 publications

(45 citation statements)

References 5 publications

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“…The prepatent period observed during this study for the E. tenella, E. acervulina, and E. maxima isolates varied from 5 to 7 days; similar results were described (JEURISSEN et al, 1996;YOUN;NOH, 2001;GABRIEL et al, 2006). Various studies using early growing strains of this parasite (MONTES et al, 1998;MANARINI, 2001;KAWAZOE et al, 2005) were aimed at the determination of the prepatent period from the parent strain.…”

Section: Discussionsupporting

confidence: 75%

Patogenicidade e observações histopatológicas de frangos de corte infectados experimentalmente com isolados de Eimeria tenella, E. acervulina e E. maxima

et al. 2007

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Cooccidiosis is one of the most important causes of economic losses within the poultry industry. The objective of this study was to evaluate the pathogenicity of E. tenella, E. acervulina, and E. maxima strains in commercial broilers chicks. Thirty nine commercial one day old broiler chicks, unvaccinated against coccidiosis, were used during this experiment. At day 14, chickens of G1 (n=10), G2 (n=10) and G3 (n=10) were infected with 2 x 10 4 sporulated oocysts of E. tenella, E. acervulina, and E. maxima respectively; G4 (n=9) served as the uninfected control group. All birds were sacrificed with 21 day old (seven days after infection). The prepatent period (PPP) for G1 and G3 was seven days, however, E. acervulina (G2) had a PPP of five days. No statistical differences were observed when the average weight gain (G1=182.7±63.4; G2=145.2±51.0; G3=183.3±56.8; and G4=211.5±89.0, p>0.10) of the evaluated groups was compared. Average of lesion scores were determined G1 (1.3±0.48, scores 1(n=7) and 2(n=3)), G2 (0.4±0.52, scores 0(n=6), 1(n=4)), and G3 (1.1±0.99, scores 0(n=4), 1(n=1) and 2(n=5)). Chickens from the infected groups (G1, G2 and G4) did not demonstrate a lesion score above 2. The histopathological lesions induced by these strains were consistent with those described for infection by Eimeria spp.

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Section: Discussionsupporting

confidence: 75%

Patogenicidade e observações histopatológicas de frangos de corte infectados experimentalmente com isolados de Eimeria tenella, E. acervulina e E. maxima

et al. 2007

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“…Considering these reductions in faecal oocyst output in the supplemented groups, it is possible that GR might be associated with anticoccidial effects. Infection with E. tenella typically leads to swelling and damage to the caecal wall, which alters the normal function of the chicken intestine (Jeurissen et al, 1996), although this effect depends on the infection rate.…”

Section: Discussionmentioning

confidence: 99%

Anticoccidial effect of supplemental dietaryGalla Rhoisagainst infection withEimeria tenellain chickens

et al. 2012

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The anticoccidial effects of Galla Rhois (GR) powder, which contains a major tannin-derived component of 52.7%, were evaluated in chickens following oral infection with Eimeria tenella. One-day-old chickens were assigned to five groups (control, unsupplemented, GR 0.5% supplemented [GRS 0.5%], GRS 1.0% [GRS 1.0%] and salinomycin supplemented [SS]). The chickens were fed a standard diet supplemented or not supplemented with GR or salinomycin for 10 days prior to infection. The birds received the supplemented diets continuously until 10 days post infection. The effects of GR on a E. tenella infection were evaluated by several parameters, including body weight gain, feed intake, oocyst excretion, bloody diarrhoea, and lesion scores. Infected chickens on the GRS and SS diets had a relatively moderate body weight loss (reduction ratio < 15%) and improved feed conversion. GRS and SS chickens produced significantly fewer faecal oocysts (P<0.05) and showed milder bloody diarrhoea compared with the E. tenella-infected control group. Furthermore, the lesion scores of both the GRS 0.5% and GRS 1.0% groups were significantly lower than the scores of the unsupplemented group on day 5 post infection. The lesion scores for the GR groups were similar to the scores for the SS group. In conclusion, this study suggests that GR appears to be as efficacious as salinomycin against E. tenella infection. GR supplementation leads to a reduction in infected chickens, although infected chickens are still affected compared with the uninfected control group. GR-based diets may be beneficial in preventing or treating coccidial infections in poultry.

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“…Vaccination offers a promising means of preventing coccidiosis, since Eimeria infection in natural settings induces strong protective immunity (10). Currently available immunological control strategies consist of subacute infection with virulent or live and attenuated parasites.…”

Section: Discussionmentioning

confidence: 99%

Protective Immunity against Eimeria acervulina following In Ovo Immunization with a Recombinant Subunit Vaccine and Cytokine Genes

Ding

Lillehoj

Quiróz³

et al. 2004

Infect Immun

104

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A purified recombinant protein from Eimeria acervulina (3-1E) was used to vaccinate chickens in ovo against coccidiosis both alone and in combination with expression plasmids encoding the interleukin 1 (IL-1), IL-2, IL-6, IL-8, IL-15, IL-16, IL-17, IL-18, or gamma interferon (IFN-␥) gene. When used alone, vaccination with 100 or 500 g of 3-1E resulted in significantly decreased oocyst shedding compared with that in nonvaccinated chickens. Simultaneous vaccination of the 3-1E protein with the IL-1, -15, -16, or -17 gene induced higher serum antibody responses than 3-1E alone. To evaluate protective intestinal immunity, vaccinated birds were challenged with live E. acervulina oocysts 14 days posthatch, and fecal-oocyst shedding and body weight gain were determined as parameters of coccidiosis. Chickens vaccinated with 3-1E protein showed significantly lower oocyst shedding and normal body weight gain than nonvaccinated and infected controls. Simultaneous immunization with 3-1E and the IL-2, -15, -17, or -18 or IFN-␥ gene further reduced oocyst shedding compared with that achieved with 3-1E alone. These results provide the first evidence that in ovo vaccination with the recombinant 3-1E Eimeria protein induces protective intestinal immunity against coccidiosis, and this effect was enhanced by coadministration of genes encoding immunity-related cytokines.

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Eimeria tenella infections in chickens: aspects of host-parasite: interaction

Cited by 53 publications

References 5 publications

Patogenicidade e observações histopatológicas de frangos de corte infectados experimentalmente com isolados de Eimeria tenella, E. acervulina e E. maxima

Patogenicidade e observações histopatológicas de frangos de corte infectados experimentalmente com isolados de Eimeria tenella, E. acervulina e E. maxima

Anticoccidial effect of supplemental dietaryGalla Rhoisagainst infection withEimeria tenellain chickens

Protective Immunity against Eimeria acervulina following In Ovo Immunization with a Recombinant Subunit Vaccine and Cytokine Genes

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