Helminth infections in chickens (Gallus domesticus) raised in different production systems in Brazil

Silva, Giane Serafim da; Romera, Daiane Mompean; Conhalato, Giane da Silva; Soares, Vando Edésio; Meireles, Marcelo Vasconcelos

doi:10.1016/j.vprsr.2018.02.003

Cited by 11 publications

(15 citation statements)

References 14 publications

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“…Afterwards, works were published in the States of Rio de Janeiro (D'Avila et al, 2004;Gomes et al, 2009), Paraná, (Vieira, 2010), São Paulo (Silva et al, 2016) and so on, and also pointed out Ascaridia galli, Heterakis gallinarum and Railleitina as frequent parasites in chicken. However, chickens can present a diversity of nematode, cestoda and trematoda helminthes as reported by Silva et al (2018) when studying helminthic infections in chickens (Gallus domesticus) raised indifferent production systems in Brazil Related to the sex of the parasites we had: 40% female and 60% male of A. galli, 36.11% female and 63.89% males of H. gallinarum and 72.22% female and 27.78% male of Subulura spp. The mean infection rate was as follows: 1.18; 2.22; 1.06; 9.00 for A. galli, H. gallinarum, Subulura spp., R. echinobothrida, respectively.…”

Section: Resultsmentioning

confidence: 93%

Gastrointestinal Parasites in Free-Range Chicken Raised under Extensive System from the Northeast of Brazil

Saraiva

Campina

Gonçalves

et al. 2021

Braz. J. Poult. Sci.

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Brazilian poultry production is growing, mainly due to the cost and benefit that chicken meat provides. The importance of freerange chickens and the susceptibility, to which they are exposed, makes it necessary to know about gastrointestinal parasites and the consequences that large infections can cause for them as such as weight loss. The present study aimed to determine the occurrence of gastrointestinal parasites in free-range hens raised in an extensive regime in the municipality of Santa Rita, state of Maranhão, Brazil. The studied population was composed of adult chickens (Gallus gallus domesticus) acquired from slaughterhouses in the region. The gastrointestinal organs of each chicken were separated and subsequently conditioned in flasks containing Railliet and Henry's solution and sent to the laboratory, to be analyzed and processed. Of the 100 chickens examined, 227 specimens of helminthes were identified, with a frequency of 32.6% for nematodes and 67.4% for cestodes. Among the nematode the following parasites were identified: Ascaridia galli (27.03%); Heterakis gallinarum (48.65%) and Subulura spp. (24, 32%). Raillietina echinobothrida (100%) was the only cestoda identified. The average infection rate by species of parasite was 1.18 for A. galli, 2.22 for H. gallinarum, 1.06 for Subulura spp. and 9.00 for R. echinobothrida. It is concluded that free-range chickens are parasitized by nematodes and cestoda.

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Section: Resultsmentioning

confidence: 93%

Gastrointestinal Parasites in Free-Range Chicken Raised under Extensive System from the Northeast of Brazil

Saraiva

Campina

Gonçalves

et al. 2021

Braz. J. Poult. Sci.

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“…In Argentina, broiler chicken flocks were evaluated and 25% of flocks were shown infected but no correlation was found between nematodes and coccidian infections (De Franceschi et al, 2008). Previous studies in Brazil, have found broiler flocks infected by Ascaridia galli in 10/17 municipalities of São Paulo (Da Silva et al, 2018), in free-range flocks in the neighboring state (Paraná), with 45% infected (Vieira et al, 2015), and in Santa Catarina in 21.7% (Quadros et al, 2015). In our study, we show that raising broilers in Minas Gerais, previously shown to naturally occur A galli by Mendes et al (1976) and in our unpublished extension service, especially for longer and without preventive medication, may lead to highly significant infection.…”

Section: Resultsmentioning

confidence: 99%

An Outbreak of Intestinal Obstruction by Ascaridia Galli in Broilers in Minas Gerais

Torres

Costa

Pinto

et al. 2019

Braz. J. Poult. Sci.

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Industrial broilers raised on helminthic medication-free feed were diagnosed with a severe disease caused by Ascaridia galli, characterized by intestinal hemorrhage and obstruction. A. galli was identified based on the morphological features of the nematode. Broilers were raised for a longer period (63 days) for weight recovery, grouped as stunted (n=500), had low body score and had fetid diarrhea. The duodenumjejunum segment was the most severely affected with obstruction and had localized accumulation of gas. The intestinal mucosa was severely congested with petechial and suffusive hemorrhages. The outbreak resulted in morbidity of about 10% and mortality of up to 4% and was associated to the absence of preventive medication on feed and slack biosecurity. The reemergence of A. galli is discussed in view of the alternative poultry management and raising conditions for drug free and welfare.

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“…Exposure and infestation of several infectious diseases could be observed in the investigated flocks: the prevalence of gastrointestinal nematodes ranged from 0–57.4% ( Table 3 ). The frequent observation of nematodes and cestodes especially in free-range systems has resulted in classifying gastrointestinal parasites as re-emerging diseases [ 35 , 36 , 37 ]. In agreement with previous investigators, a relatively high variation of the prevalence could be observed amongst flocks, which may reflect the impact of environmental conditions/season [ 35 ].…”

Section: Discussionmentioning

confidence: 99%

Managing Free-Range Laying Hens—Part B: Early Range Users Have More Pathology Findings at the End of Lay but Have a Significantly Higher Chance of Survival—An Indicative Study

Sibanda

O’Shea

Vilela

et al. 2020

Animals

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While free-range laying hens frequently experience health and welfare challenges, the contribution of range use towards these risks are largely unknown. The aim of this pilot study was to investigate the survival, health and welfare of commercial free-range laying hens and explore the association with early range use. Range use of 9375 Lohmann Brown hens housed within five flocks was assessed during 18–21 weeks of age and individual hens were classified as “rangers” (frequent range users), “roamers” (intermittent range users), and “stayers” (rare/no range users) were then subject to necropsy at 74 weeks of age. Rangers and roamers were three times and 2.4 times more likely to survive than stayers, respectively (p = 0.001). Overall, rangers had significantly better feather cover and more lesions associated with spotty liver diseases compared to roamers and stayers (p = 0.001). Similarly, rangers and roamers had a higher prevalence of A. galli infection and less frequent signs of fatty liver syndrome compared to stayers. Rangers had a higher proportion of hens with full ovary follicle production compared to stayers and roamers (p = 0.035). This information is highly relevant to consider the targeted support of different flock subpopulations to improve hen health and welfare, directly affecting farm profitability. Further research on other farms is warranted to investigate the transferability of the observed results.

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Helminth infections in chickens (Gallus domesticus) raised in different production systems in Brazil

Cited by 11 publications

References 14 publications

Gastrointestinal Parasites in Free-Range Chicken Raised under Extensive System from the Northeast of Brazil

Gastrointestinal Parasites in Free-Range Chicken Raised under Extensive System from the Northeast of Brazil

An Outbreak of Intestinal Obstruction by Ascaridia Galli in Broilers in Minas Gerais

Managing Free-Range Laying Hens—Part B: Early Range Users Have More Pathology Findings at the End of Lay but Have a Significantly Higher Chance of Survival—An Indicative Study

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