The Pathogenesis of Trichostrongyloid Parasites. III. Some Physiological Observations in Lambs Suffering from Acute Parasitic Gastroenteritis

Baker, N. F.; Cook, Estelle; Douglas, J. R.; Cornelius, Charles E.

doi:10.2307/3274817

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…In sheep, the pre-patent period of Haemonchus is 18–21 days; adult worms are short-lived, surviving in their hosts for only a few months. The main pathogenic effects are caused by the L4s and adults, which both feed on blood, causing severe anaemia which usually becomes apparent after two weeks of infection [14]. Acute disease is usually dependent on the intensity of infection, and is associated with signs of haemorrhagic anaemia, dark-coloured faeces, oedema, weakness, reduced production of wool and muscle mass, or sometimes sudden death.…”

Section: Reviewmentioning

confidence: 99%

Impact of gastrointestinal parasitic nematodes of sheep, and the role of advanced molecular tools for exploring epidemiology and drug resistance - an Australian perspective

2013

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Parasitic nematodes (roundworms) of small ruminants and other livestock have major economic impacts worldwide. Despite the impact of the diseases caused by these nematodes and the discovery of new therapeutic agents (anthelmintics), there has been relatively limited progress in the development of practical molecular tools to study the epidemiology of these nematodes. Specific diagnosis underpins parasite control, and the detection and monitoring of anthelmintic resistance in livestock parasites, presently a major concern around the world. The purpose of the present article is to provide a concise account of the biology and knowledge of the epidemiology of the gastrointestinal nematodes (order Strongylida), from an Australian perspective, and to emphasize the importance of utilizing advanced molecular tools for the specific diagnosis of nematode infections for refined investigations of parasite epidemiology and drug resistance detection in combination with conventional methods. It also gives a perspective on the possibility of harnessing genetic, genomic and bioinformatic technologies to better understand parasites and control parasitic diseases.

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Section: Reviewmentioning

confidence: 99%

Impact of gastrointestinal parasitic nematodes of sheep, and the role of advanced molecular tools for exploring epidemiology and drug resistance - an Australian perspective

2013

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“…Worms are short-lived, surviving in their hosts for only a few months. The main pathogenic effects are caused by their blood feeding activity, resulting in anemia which usually becomes apparent after~2 weeks of infection (Baker et al, 1959). Acute disease is usually intensitydependent and is associated with dark-stained feces, edema, weakness, reduced production of wool and muscle mass, or sometimes sudden death.…”

Section: Key Nematodes and Aspects Of Diseasementioning

confidence: 99%

Advances in the diagnosis of key gastrointestinal nematode infections of livestock, with an emphasis on small ruminants

Roeber

Jex

Gasser

2013

Biotechnology Advances

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Parasitic nematodes (roundworms) of livestock have major economic impact globally. In spite of the diseases caused by these nematodes and some advances in the design of new therapeutic agents (anthelmintics) and attempts to develop vaccines against some of them, there has been limited progress in the establishment of practical diagnostic techniques. The specific and sensitive diagnosis of gastrointestinal nematode infections of livestock underpins effective disease control, which is highly relevant now that anthelmintic resistance (AR) is a major problem. Traditional diagnostic techniques have major constraints, in terms of sensitivity and specificity. The purpose of this article is to provide a brief background on gastrointestinal nematodes (Strongylida) of livestock and their control; to summarize conventional methods used for the diagnosis and discuss their constraints; to review key molecular-diagnostic methods and recent progress in the development of advanced amplification-based and sequencing technologies, and their implications for epidemiological investigations and the control of parasitic diseases.

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“…All other blood counts did not differ between treatments. The principal clinical sign of Haemonchus contortus (H. contortus) infections is anemia, due to the blood-letting activities of the parasite [52]. The cool season parasite T. circumcinta (formerly Ostertagia circumcinta) interferes with absorption of nutrients and may cause weight loss and possibly diarrhea [53].…”

Section: Bloodmentioning

confidence: 99%

Evaluating the effects of finishing diet and feeding location on sheep performance, carcass characteristics, and internal parasites

Ragen¹,

Butler²,

Boles³

et al. 2021

J Anim Sci Technol

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A 3 yr experiment was conducted to evaluate the influence of diet and feeding location on animal performance, carcass characteristics, whole blood counts, and internal parasite burden of lambs assigned to 1 of 4 treatments: 1) confinement fed 71% alfalfa, 18% barley pellet, 5% molasses, 0.013% Bovatec, 6.1% vitamin/mineral package diet (CALF), 2) confinement fed 60% barley, 26% alfalfa pellet, 4% molasses, 2.5% soybean-hi pro, 0.016% Bovatec, 7.4% vitamin/mineral package diet (CBAR), 3) field fed 71% alfalfa, 18% barley pellet, 5% molasses, 0.013% Bovatec, 6.1% vitamin/mineral package diet (FALF), and 4) field fed 60% barley, 26% alfalfa pellet, 4% molasses, 2.5% soybean-hi pro, 0.016% Bovatec, 7.4% vitamin/mineral package diet (FBAR). A year × location interaction was detected for ending body weight (BW), average daily gain (ADG), and dry matter intake (DMI); therefore results are presented by year. In all years, cost of gain and DMI were greater for CALF and FALF than for CBAR and FBAR feed treatments (p ≤ 0.03). In yr 2 and 3 field treatments had greater ending BW and ADG than confinement treatments. For all years, diet did not affect ending BW or ADG. In yr 1 dressing percent and rib eye area were greater for field finished lambs than confinement finished (p ≤ 0.02) and Warner-Bratzler shear force was greater for CALF and FALF (p = 0.03). In yr 2 lambs in FALF and FBAR treatments had greater leg scores and conformation than CALF and CBAR (p = 0.09). In yr 1, FALF had a greater small intestine total worm count than all other treatments. In yr 1, ending Trichostrongyle type egg counts were greater for FALF (p = 0.05). In yr 2, ending Nematodirus spp. egg counts were greater for FALF and lowest for CBAR (p < 0.01). Abomasum Teladorsagia circumcinta worm burden was greater in CALF than all other treatments (p = 0.07) in yr 2. While field finishing lambs with a grain-or forage-based diet we conclude that it is possible to produce a quality lamb product without adverse effects to animal performance, carcass quality or increasing parasite burdens.

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The Pathogenesis of Trichostrongyloid Parasites. III. Some Physiological Observations in Lambs Suffering from Acute Parasitic Gastroenteritis

Cited by 14 publications

References 4 publications

Impact of gastrointestinal parasitic nematodes of sheep, and the role of advanced molecular tools for exploring epidemiology and drug resistance - an Australian perspective

Impact of gastrointestinal parasitic nematodes of sheep, and the role of advanced molecular tools for exploring epidemiology and drug resistance - an Australian perspective

Advances in the diagnosis of key gastrointestinal nematode infections of livestock, with an emphasis on small ruminants

Evaluating the effects of finishing diet and feeding location on sheep performance, carcass characteristics, and internal parasites

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