Investigation of the parasitic nematode Ascaridia galli (Shrank 1788) as a potential vector for Salmonella enterica dissemination in poultry

Chadfield, M. S.; Permin, A.; Nansen, P.; Bisgaard, Magne

doi:10.1007/pl00008585

Cited by 47 publications

(37 citation statements)

References 18 publications

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“…Heavy worm burdens can predispose birds to develop secondary bacterial infections. In some cases, Ascaridia galli eggs may act as mechanical vectors of reproductive tract bacterial infections such as Salmonella (Chadfield et al 2001). In the present study, at 38 weeks of age, necropsied birds from the control group had higher (P < 0.05) infestation with round-and band-worms (Table 2), potentially contributing to a lower performance and higher incidence of reproductive tract infections and mortality.…”

Section: Discussionmentioning

confidence: 48%

The potential for probiotics to prevent reproductive tract lesions in free-range laying hens

Shini

Blackall

2013

Anim. Prod. Sci.

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Abstract.A study was undertaken to investigate the ability of two commercial probiotics applied in free-range laying hens (from 18 to 22 weeks of age) in reducing the occurrence of reproductive tract pathologies, and improving hen health and performance. In all, 630 17-week-old brown layers were transferred to a freshly cleaned free-range laying facility, and randomly divided into three groups, with three replicates of 70 birds each. Both probiotics were administered in the drinking water (Groups 1 and 2) on a daily basis for 4 weeks, while Group 3 was left untreated. At 38 weeks of age, the results demonstrated that treatment with either probiotic significantly reduced the occurrence of reproductive tract pathologies (control vs probiotics, 33% vs 22% and 11%; P < 0.01), mortalities (control vs probiotics; 3.8% vs 1.5 and 1.9%; P < 0.01), and increased the performance of hens, for another 20 weeks post-treatments (hen day production for control vs probiotics 75% vs 90% and 94%; P < 0.01). Birds treated with probiotics maintained their bodyweight and egg weights at standard ranges, while untreated birds did not perform at this level. Although we were unable to show any effect on cloacal bacterial colonisation, the results of the present study provided some initial evidence that reproductive pathologies that often cause drops in egg production and sudden deaths of birds, can be reduced if free range hens are treated with a commercial probiotic before or during the onset of lay. The use of a probiotic benefits the health and performance status of hens, resulting in better hen welfare and significant economic gains to egg producers.

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Section: Discussionmentioning

confidence: 48%

The potential for probiotics to prevent reproductive tract lesions in free-range laying hens

Shini

Blackall

2013

Anim. Prod. Sci.

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“…Heavy infection with adult worm can cause obstruction of the small intestine and death (Ackert and Herrick 1928;Ikeme 1971;Tugwell and Ackert 1952). A. galli may also transmits other infection such as Salmonella in chicken (Chadfield et al 2001;Eigaard et al 2006) and concurrent infection of A. galli with other pathogens produce more severe pathological condition than the single infection with this pathogen alone (Dahl et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Cross sectional epidemiological investigation on the prevalence of gastrointestinal helminths in free range chickens in Narsingdi district, Bangladesh

Ferdushy

Hasan

Kadir³

2014

J Parasit Dis

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Rural poultry production in Bangladesh is mainly based on the free range or backyard poultry production system. This backyard poultry plays a vital tool for poverty alleviation as well as for empowerment of poor women of this country. However, this production system has disadvantage of susceptibility to many diseases including higher burden of parasitic infection. Therefore this cross sectional epidemiological investigation was done to determine the prevalence and distribution of gastrointestinal helminths in Narsingdi district, Bangladesh. To conduct this study a total of 150 chickens from three different villages of Narsingdi district, Bangladesh (50 chickens per village) were collected by random sampling method and killed by cervical disarticulation. Thereafter, all the chickens were necropsied and gastrointestinal tracts were examined macroscopically for the presence helminth infection. In total two nematode (Ascaridia galli, Heterakis gallinarum,) and one cestode (Raillietina spp.) were identified by post mortem examination. Raillietina spp. was detected as the most prevalent helminth species (86-92 %) followed by A. galli (70-86 %), and H. gallinarum (70-76 %) in studied villages. In some chickens petechial hemorrhage were observed in the small intestinal wall which was associated with the A. galli infection and for some birds white tiny nodules were detected in case of H. gallinarum infection. No significant difference in parasite prevalence was observed between male and female bird as well as among three studied villages (P [ 0.05). We observed that most of chickens were infected with more than one species of parasites. This finding suggests that the poultry production system in rural areas of Bangladesh and the environmental conditions are very favourable for the transmission and persistence of the parasite species in rural areas of Bangladesh.

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“…A. galli infections have been associated with reductions in egg production in laying hens and in overall growth in chickens (Soulsby, 1982;Ramadan & Abou Znada, 1991). A. galli may also play a role in transmission of Salmonella infections (Chadfield et al, 2001;Eigaard et al, 2006) and avian reoviruses (Calnek, 1997) resulting in disease and economic losses.…”

Section: Introductionmentioning

confidence: 99%

Molecular and parasitological tools for the study ofAscaridia gallipopulation dynamics in chickens

et al. 2010

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Experiments were first conducted to compare and evaluate different methods of Ascaridia galli larval recovery from the chicken intestine. The number of larvae recovered from the intestinal wall of chickens infected with 1000 embryonated A. galli eggs and killed 15 days post infection (p.i.) by three methods (ethylenediamine tetraacetic acid [EDTA], pepsin digestion and scraping) were compared. The EDTA and pepsin digestion were found to be the most efficient methods with no significant difference (P!0.05) in the number of recovered larvae between the two. Subsequently, three different A. galli cohorts were established using the polymerase chain reaction-linked restriction fragment length polymorphism (PCR-RFLP) technique. A 533-bp long region of the cytochrome c oxidase subunit 1 gene of the mitochondrial DNA was targeted and 22 A. galli females were allocated to three different haplotypes. The four females with the highest embryonation rate from each haplotype group (total 12 females) were selected and used to inoculate each of 12 chickens with a dose of 1000 embryonated eggs. The chickens were killed 15 days p.i. and A. galli larvae were recovered from the small intestinal wall by the EDTA method and by sieving the lumen content on a 90 mm sieve. DNA of 40 larvae from each of the three different haplotypes was extracted using a worm lysis buffer, and PCR-RFLP analysis of these larvae revealed the same haplotype as that of their maternal parent. The identification of distinguishable cohorts may be a powerful tool in population studies of parasite turnover within the animal host.

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Investigation of the parasitic nematode Ascaridia galli (Shrank 1788) as a potential vector for Salmonella enterica dissemination in poultry

Cited by 47 publications

References 18 publications

The potential for probiotics to prevent reproductive tract lesions in free-range laying hens

The potential for probiotics to prevent reproductive tract lesions in free-range laying hens

Cross sectional epidemiological investigation on the prevalence of gastrointestinal helminths in free range chickens in Narsingdi district, Bangladesh

Molecular and parasitological tools for the study ofAscaridia gallipopulation dynamics in chickens

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