PRODUCTION EFFECTS OF LIVER FLUKE <i>(FASCIOLA HEPATICA)</i> INFECTION IN BEEF CATTLE

Chick, B. F.; Coverdale, O. R.; Jackson, A.

doi:10.1111/j.1751-0813.1980.tb02605.x

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…The ecological conditions of each region, intensive grazing systems or extensive, mixed grazing cattle and sheep; determine the epidemiology of the disease for each region. All the factors that influence the life cycle of the parasite and its transmission must be studied in each case to establish reasonable measures to prevent and control disease (Chick et al, 1980;Chirinos et al, 1991).…”

Section: Discussionmentioning

confidence: 99%

Epidemiology of Fasciola Hepatica in Iran

Khosravi¹,

Babaahmady²

2012

IJB

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Fascioliasis is a zoonotic disease. Their greatest importance lies in the economic impact. In order to know the current status of this parasite in the province, we decided to carry out the Epidemiology. We used history-necropsy technique for the diagnosis of this parasitosis in infected bovine animals. When we were suspecting to fascioliasis we did a proper history of the area where the animals were sick. A retrospective study was carried out based on the existent registrations of Fascioliasis discoveries in the bovine slaughterhouse of Ilam province during 3 years successively. In the year of (07-08), 8.48% of the sacrificed animals were infested. The year of (08-09) 6.03% and the third years (09-10) 11.09%. In the (2007-2010) we found a high prevalence of Fascioliasis in animals slaughtered in the province, rising more than one third of the total, with significant differences in proportions (P<0.01) among the three years. The findings were also subcapsular hematomas, venous congestion and fibrous peritonitis. The economic losses were considerable.

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Section: Discussionmentioning

confidence: 99%

Epidemiology of Fasciola Hepatica in Iran

Khosravi¹,

Babaahmady²

2012

IJB

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“…Bovine fascioliasis provides a good example. The miracidia of Fasciola hepatica are generally held to survive around 24 h or less (Pantelouris, 1965;Hope Cawdery, Gettinby & Grainger, 1978), but the mean expected life-spans of the longest-lived stages in the life-cycle, the metacercariae on the pasture and the flukes in the primary host, are also relatively short, being about 10-14 weeks in both cases (Smith, 1982;Chick, Coverdale & Jackson, 1980). This paper reports the results of some experimental work designed to provide a quantitative description of the survival of F. hepatica miracidia under various conditions.…”

Section: Introductionmentioning

confidence: 99%

The influence of water temperature and pH on the survival of Fasciola hepatica miracidia

Smith

Grenfell

1984

Parasitology

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Experimental studies on the survival of Fasciola hepatica miracidia show no evidence that miracidial mortality varies with the pH of the medium, at least in the range 6.0-8.0. On the other hand, miracidial mortality is shown to vary with both the temperature of the medium and the age of the larvae. The mean expected life-span of the miracidium decreases from about 35 h at 6 degrees C to about 6 h at 25 degrees C. The Gompertz survival function provides a good description of the miracidial survivorship curves over the range of temperatures used, and we describe a maximum likelihood method of estimating the mean values of the parameters of this function, together with their approximate 95% confidence limits.

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“…Vet. J., 2021, 25 (2), 85-114 weights were depressed 3% and 20% in steers receiving 600 metacercariae and grazed at 3.54 beasts/hectare and 4.39 beasts/hectare respectively (Chick et al, 2008).…”

Section: Discussionmentioning

confidence: 97%

Enzymatic and fecundity evaluation of Fasciola hepatica exposed to different doses of γ- irradiation in Ethiopian sheep

Tadesse¹,

Eguale²,

Ashenafi³

et al. 2021

Ethiop. Vet. J.

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The upshot of γ-irradiated Fasciola hepatica infection on the activity of plasma glutamate dehydrogenase (GLDH) and γ-glutamyl transpeptidase (GGT) was evaluated in 36 sheep infected with a single dose of 30, 60, 120, and 240 grays and those kept as negative and positive control over 17 weeks. During this period, serum and faecal samples, as well as body weight gains, were taken at weekly intervals. Furthermore, the effects of the irradiation dose (500) for oral vaccination and on the recovery of adult flukes were assessed following primary infection. Eggs were first detected in the faeces of infected sheep on week 8 post-infection. The parasite viability was severely affected by doses of γ-irradiation of 120 Gy or 240 Gy. In the aforementioned doses, relatively low numbers of mature flukes of about 60 (17.1%) and 38 (10.8%) were recovered than the control group, respectively. The sensitized lambs also showed less hepatic damage compared with the controls as indicated by lower levels of the serum enzyme glutamate dehydrogenase and γ- glutamyl transferase significant body weight loss was observed between weeks 6 and 8 post-infection followed by a steady increase of the mean weight of infected animals across time. In conclusion, vaccination of sheep with γ irradiated metacercariae of F. hepatica appeared to affect the number and development of the fluke population resulting in reduced hepatic damage during migration, reduced fecundity after patency, as measured by worm and egg counts, levels of serum glutamate dehydrogenase and γ- glutamyl transferase.

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PRODUCTION EFFECTS OF LIVER FLUKE (FASCIOLA HEPATICA) INFECTION IN BEEF CATTLE

Cited by 14 publications

References 7 publications

Epidemiology of Fasciola Hepatica in Iran

Epidemiology of Fasciola Hepatica in Iran

The influence of water temperature and pH on the survival of Fasciola hepatica miracidia

Enzymatic and fecundity evaluation of Fasciola hepatica exposed to different doses of γ- irradiation in Ethiopian sheep

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