Observations on the migration and development of Toxocara vitulorum in natural and experimental hosts

Warren, Ed

doi:10.1016/0020-7519(71)90049-x

Cited by 64 publications

(17 citation statements)

References 12 publications

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“…Infective eggs hatch and larvae migrate through different organs, most of them staying in the liver. In pregnant cows, larvae move to the udder around the calving time, pass in the milk and then infect the newborn suckling calf during the first two weeks after birth (Warren 1971;Mia et al 1975;Roberts 1990b). Their development to the adult stage can then be completed.…”

Section: Introductionmentioning

confidence: 97%

Incidence of Toxocara vitulorum in Creole calves of Guadeloupe

Mahieu

Naves

2007

Trop Anim Health Prod

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The 247 calves from 112 Creole cows of Guadeloupe were monitored for Toxocara vitulorum infection from year 2002 to 2005. The cows were in good body condition and the calf growth rate was 880g/d on average. The overall prevalence of infection was estimated to 0.77 [0.72; 0.83]. The faecal egg count peaked 49 days after calf birth, and then decreased. No clinical symptom related to T. vitulorum infection was observed, and no effect on the calf growth rate was shown. It was concluded that, despite the high prevalence of T. vitulorum, the production loss remains under the level of detection, and no drenching is needed for well-fed animals.

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Section: Introductionmentioning

confidence: 97%

Incidence of Toxocara vitulorum in Creole calves of Guadeloupe

Mahieu

Naves

2007

Trop Anim Health Prod

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“…A hepatic-pulmonary-tracheal route is followed by Ascaris in its definitive (Douvres et al, 1969) and accidental hosts including humans and cattle (Kennedy, 1954;Nichols, 1956b). Toxocara vitulorum, the cattle ascarid, must be considered in the differential diagnosis, because it follows a similar hepatic-pulmonary-tracheal route (Warren, 1971), infects calves, and has been recently reported in North America (Chelladurai et al, 2015;Davila et al, 2010;Woodbury et al, 2012). Therefore, molecular techniques are essential for obtaining a definitive diagnosis.…”

Section: Discussionmentioning

confidence: 99%

Respiratory disease associated with migrating Ascaris larvae in a beef calf

Chelladurai

Derscheid

Brewer

2018

Veterinary Parasitology: Regional Studies and Reports

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A group of 4-month-old beef calves were examined for clinical respiratory disease with labored breathing, coughing, and fevers of over 104°F. Necropsy of one of the calves revealed lungs that were not collapsed but had red mottled appearance on cut surface. Assessment of lung tissue by bacterial culture and PCR did not reveal bovine bacterial or viral respiratory pathogens. Histopathology of affected tissues and lymph nodes revealed larval ascarid nematodes. In combination with phylogenetic analysis, amplification and sequencing of ITS1 was used to identify the larvae as Ascaris.

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“…Calves become infected by ingesting third-stage larvae from an infected dam's milk (Mia et al 1975;Roberts et al 1990;Warren 1971), but not from ingesting eggs in the environment (Mia et al 1975;Refuerzo and Albis-Jimenez 1954). Larvae ingested by calves develop into adults in 3-4 weeks and then begin shedding eggs in the faeces.…”

Section: Introductionmentioning

confidence: 97%

“…Neoascaris vitulorum, Goeze, 1782) is a parasitic ascarid of Bubalus and Bos spp. (Roberts 1989a;Warren 1971) found generally in tropical and subtropical climates worldwide (Starke et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Efficacy of eprinomectin against Toxocara vitulorum in calves

Avcıoğlu

Balkaya

2010

Trop Anim Health Prod

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This study was made to investigate efficacy of eprinomectin pour-on against to Toxocara vitulorum in calves. In the study, 16 calves naturally infected with T. vitulorum were divided into two groups as treatment (eight calves) and control (eight calves). Eprinomectin (0.5 mg/kg, Eprinex, Merial) was given to treatment group calves, and eggs per gramme were determined in the faeces on the day of pre-treatment and the second, third, fourth, fifth, sixth, 14th and 28th days of post-treatment. No side effects associated with nervous, respiratory and gastrointestinal systems were observed. In conclusion, eprinomectin was determined to be 100% effective against T. vitulorum. This is the first study to evaluate the efficacy of eprinomectin against a natural T. vitulorum infection in calves.

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Observations on the migration and development of Toxocara vitulorum in natural and experimental hosts

Cited by 64 publications

References 12 publications

Incidence of Toxocara vitulorum in Creole calves of Guadeloupe

Incidence of Toxocara vitulorum in Creole calves of Guadeloupe

Respiratory disease associated with migrating Ascaris larvae in a beef calf

Efficacy of eprinomectin against Toxocara vitulorum in calves

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