Endoparasitic helminths of the harbour seal, Phoca vitulina, in the Netherlands

Borgsteede, F.H.M.; Bus, H. G. J.; Verplanke, J. A. W.; Burg, W. P. J. van der

doi:10.1016/0077-7579(91)90022-s

Cited by 21 publications

(33 citation statements)

References 5 publications

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“…The high prevalence of parasitic infection in the respiratory tract (76%) recorded in this study was not found during the 1988/1989 epidemic by Claussen et al (1991), who recorded a prevalence of 26% in seals from Lower Saxony, and by Borgsteede et al (1991), who only found a prevalence of 6% in waters around The Netherlands.…”

Section: Discussionmentioning

confidence: 63%

“…Compared to Wndings from the Wrst PDV epidemic (25% prevalence found by Borgsteede et al 1991 and 32% prevalence found by Claussen et al 1991), the occurrence of A. spirocauda in seals from the Wadden Sea has decreased. Otostrongylus circumlitus presumably migrates to the heart via the bloodstream through pulmonary blood vessels or via a postmortem migration before the carcasses were frozen.…”

Section: Discussionmentioning

confidence: 99%

“…The prevalence of acanthocephalans (23%) was low compared to 95% in seals from waters of Lower Saxony in 1988/1989(Strauss et al 1991 and 70% in seals from the Dutch coast during 1988 (Borgsteede et al 1991). An increasing trend in acanthocephalan infection levels was found during the study period.…”

Section: Discussionmentioning

confidence: 99%

“…Generalized linear (GLM) and linear mixed eVect (LME) models were performed using the statistical platform R (2.4.1). Parasite fauna and prevalence from the 1988/1989 PDV epidemic published by Borgsteede et al (1991), Claussen et al (1991), Lunneryd (1992aLunneryd ( , 1992b and Strauss et al (1991) were compared to the data from this study. Table 1 shows the age and sex distribution of shot and dead stranded seals.…”

Section: Methodsmentioning

confidence: 99%

“…Since 1989, various research projects have been established to monitor the population dynamics and health status of seals. Special attention has been given to parasites as major agents of infection, but data on parasites of seals from the Wadden Sea originate mostly from seals that died during the 1988/1989 PDV epidemic (Borgsteede et al 1991;Claussen et al 1991;Lunneryd 1992a). Neither before nor after the Wrst epizootic have systematic investigations of the parasitation of seals in the North Sea been performed.…”

Section: Introductionmentioning

confidence: 99%

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Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics

2007

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Parasites were collected from 107 harbour seals (Phoca vitulina) found on the coasts of Schleswig-Holstein, Germany, between 1997 and 2000. The prevalence of the parasites and their associated pathology were investigated. Eight species of parasites, primarily nematodes, were identiWed from the examined organs: two anisakid nematodes (Pseudoterranova decipiens (sensu lato), Contracaecum osculatum (sensu lato)) from the stomach, Otostrongylus circumlitus (Crenosomatidae) and ParaWlaroides gymnurus (Filaroididae) from the respiratory tract, one Wlarioid nematode (Acanthocheilonema spirocauda) from the heart, two acanthocephalans, Corynosoma strumosum and C. semerme (Polymorphidae), from the intestine and an ectoparasite, Echinophthirius horridus (Anoplura, Insecta). Lungworm infection was the most prominent parasitological Wnding and secondary bacterial bronchopneumonia the most pathogenic lesion correlated with the parasites. Heavy nematode burdens in the respiratory tract were highly agerelated and more frequent in young seals. A positive correlation was observed between high levels of pulmonary infection and severity of bronchopneumonia. The prevalence of lungworms in this study was higher than in seals that died during the 1988/1989 Phocine Distemper Virus epidemic, and the prevalence of acanthocephalans and heartworms had decreased compared to Wndings from the Wrst die-oV.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics

2007

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Lungworms of Marine Mammals

Measures¹

2001

Parasitic Diseases of Wild Mammals

104

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Surprisingly long body length of the lungworm Parafilaroides gymnurus from common seals of the Dutch North Sea

Elson-Riggins

Gibbons

Liere³

et al. 2020

Parasitol Res

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Background: The hormones insulin and adiponectin are commonly measured in equids because of their involvement in endocrinopathic laminitis. These are currently measured in serum/plasma, although jugular venipuncture can cause stress in some animals and may be impossible in needle-shy individuals. However, both hormones can be measured in saliva in other species.Objectives: To determine whether [insulin] and [total adiponectin] are detectable in equine saliva using automated assays and whether saliva collection is associated with changes in stress indicators. Additionally, the correlation between serum and salivary[insulin] was investigated. Study design: In vivo experiment.Methods: Paired blood and saliva samples were collected from eight adult ponies at multiple time-points (n = 45 paired samples). [Insulin] and [total adiponectin] were measured using automated assays validated for equine serum/plasma. Blink rates and heart rates were determined, using video recordings and a wearable heart rate monitor respectively, to assess the effects of sample collection on stress indicators compared with a control situation without a stressful stimulus.Results: [Total adiponectin] was undetectable in saliva. However, salivary [insulin] was measurable with acceptable inter-assay (1.3 ± 0.9%) and intra-assay (1.1 ± 0.6%) variability. Blink and heart rates during saliva collection did not differ significantly from those in the control setting. Serum and salivary [insulin] were not significantly correlated.Main limitations: Small sample size comprising native UK ponies; potential sampling bias as animals were recruited to the study partly based on their behaviour during blood sampling; saliva collected from unfasted animals.Conclusions: Insulin is measurable in equine saliva using an automated assay currently available in the UK, but further validation and the determination of specific diagnostic thresholds are required. Saliva collection was not associated with changes in stress indicators. Further research is therefore needed to determine the potential of equine saliva as a non-invasive alternative to blood for insulin determination.

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Endoparasitic helminths of the harbour seal, Phoca vitulina, in the Netherlands

Cited by 21 publications

References 5 publications

Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics

Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics

Lungworms of Marine Mammals

Surprisingly long body length of the lungworm Parafilaroides gymnurus from common seals of the Dutch North Sea

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