Comparative Morphology of Six Species of Strongyloides (Nematoda) and Redefinition of the Genus

Little, M. D.

doi:10.2307/3276396

Cited by 120 publications

(118 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to our knowledge there is no information that indicates that humans in contact with S. strongyloides infected dogs in Iceland have acquired infections from dogs. Little (1966) reported that early first stage larvae from duodenal aspiration were 180 -240 µm long; late first stage larvae from fresh stool were 325 -380 µm long. According to Lopez et al (2000) the length of the second stage larvae appeared to be "slightly" longer than first stage larvae.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Strongyloides stercoralis found in imported dogs, household dogs and kennel dogs in Iceland

Eydal¹,

Skírnisson²

2016

IAS

View full text Add to dashboard Cite

The aim of this paper is to report cases of the intestinal parasitic nematode Strongyloides stercoralis in dogs in Iceland. The nematode was diagnosed in 20 (0.6%) of imported dogs in quaratine in Iceland during 1989-2016. Household dogs: The first case of S. stercoralis infection diagnosed outside quaratine in Iceland was in an unhealthy household puppy purchased from an Icelandic breeding kennel (Kennel A) in 2012. A total of nine puppies purchased from Kennel A, and two dogs which had contact with dogs from the kennel, were diagnosed with S. stercoralis. Kennel dogs: In 2012 S. stercoralis was confirmed in dozens of dogs in Kennel A. Follow-up examinations after anthelmintic treatments indicated a successful removal of worms in imported and household dogs. In spite of more than a dozen anthelmintic treatment actions and other arrangements in Kennel A since 2012, recurrent infections have repeatedly been confirmed, the last one in 2015. The nematode is believed to have been introduced to the breeding kennel with an imported dog, in spite of anthelmintic treatments in quarantine. YFIRLITSníkjuþráðormurinn Strongyloides stercoralis staðfestur á Íslandi í innfluttum hundum, heimilishundum og í hundaraektunarstöð. Markmið þessa yfirlits er að greina frá tilfellum sem greinst hafa af sníkjuþráðorminum Strongyloides stercoralis í hundum á Íslandi. Ormurinn hefur greinst í saursýnum úr 20 (0.6%) hundum sem fluttir voru til landins um einungrunarstöðvar á árunum 1989-2016. Heimilishundar: Fyrsta tilfelli utan einangrunarstöðva greindist í veikum heimilishvolpi sem keyptur var á íslenskri hundaraektunarstöð 2012. Ormurinn greindist í alls níu hvolpum sem keyptir voru á stöðinni og í tveimur heimilishundum sem höfðu haft samgang við hunda frá stöðinni. Hundaraektunarstöðin: S. stercoralis greindist í tugum hunda í stöðinni í byrjun árs 2012, baeði í hvolpum og fullorðnum hundum. Innfluttu hundarnir og heimilishundarnir fengu ormalyfjameðferð og eftirfylgnirannsóknir bentu til að tekist hefði að uppraeta ormana. Margendurteknar ormalyfjagjafir á árunum 2012 -2016 og aðrar aðgerðir í hundaraektunarstöðinni virðast hafa borið umtalsverðan árangur en ormurinn hefur þó greinst í stökum saursýnum á undanförnum árum, síðast í nóvember 2015. Talið er að þráðormurinn hafi borist inn í hundaraektunarstöðina með innfluttum hundi, þrátt fyrir endurteknar ormalyfjagjafir í einangrunarstöð, smitast milli hunda í raektunarstöðinni og borist þaðan út með seldum hundum.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Identification of S. stercoralis first stage larvae (Figure 2) was based on morphological descriptions presented by Little (1966), Beaver et al (1984), Miyazaki (1991) and Ash & Orihel (1997). Microscopical size dimensions of fresh first stage larvae were obtained using a calibrated eyepiece scale.…”

Section: Parasite Identification Measurements and Photographymentioning

confidence: 99%

Strongyloides stercoralis found in imported dogs, household dogs and kennel dogs in Iceland

Eydal¹,

Skírnisson²

2016

IAS

View full text Add to dashboard Cite

show abstract

“…n. L'helminthe décrit ci-dessus diffère de toutes les espèces citées par sa plus grande taille corporelle et par les lon gueurs de l'oesophage et de la queue proportionnellement plus faibles. Little (1966a) indique que la longueur du corps des Strongyloides est de 2 à 4 mm et au plus légèrement supé rieure à 3 mm en moyenne pour les espèces décrites d'Ophi diens. Notre espèce est plus longue.…”

Section: Matériel Et Méthodesunclassified

Strongyloides natricissp. n. (Strongyloididae), un nouveau nématode parasite deNatrix maura(L. 1758) (Colubridae) en Espagne

Navarro

Serrá

1993

Ann. Parasitol. Hum. Comp.

View full text Add to dashboard Cite

“…Both species have also been identified under natural conditions in humans in Zambia with prevalences of 67% for S. stercoralis and 30·8% for S. fuelleborni (Hira and Patel, 1980). Identification of Strongyloides is based on morphological criteria of the adult female and the fact that either first-stage larvae (S. stercoralis) or eggs (S. fuelleborni) are excreted with the feces (Little, 1966). Although specific morphological and morphometric characters, particularly in the parasitic female, seem to be robust, strain variation, within-population variability, variation according to age, environmental conditions, host or geographical origin may have an effect on the unequivocal identification of species (effect of intra-and interspecific variability and/or of external factors, respectively) (Grove, 1989).…”

Section: Introductionmentioning

confidence: 99%

Genetic characterization ofStrongyloidesspp. from captive, semi-captive and wild Bornean orangutans (Pongo pygmaeus) in Central and East Kalimantan, Borneo, Indonesia

et al. 2011

View full text Add to dashboard Cite

S U M M A R YOrangutans (Pongo spp.), Asia's only great apes, are threatened in their survival due to habitat loss, hunting and infections. Nematodes of the genus Strongyloides may represent a severe cause of death in wild and captive individuals. In order to better understand which Strongyloides species/subspecies infect orangutans under different conditions, larvae were isolated from fecal material collected in Indonesia from 9 captive, 2 semi-captive and 9 wild individuals, 18 captive groups of Bornean orangutans and from 1 human working with wild orangutans. Genotyping was done at the genomic rDNA locus (part of the 18S rRNA gene and internal transcribed spacer 1, ITS1) by sequencing amplicons. Thirty isolates, including the one from the human, could be identified as S. fuelleborni fuelleborni with 18S rRNA gene identities of 98·5-100%, with a corresponding published sequence. The ITS1 sequences could be determined for 17 of these isolates revealing a huge variability and 2 main clusters without obvious pattern with regard to attributes of the hosts. The ITS1 amplicons of 2 isolates were cloned and sequenced, revealing considerable variability indicative of mixed infections. One isolate from a captive individual was identified as S. stercoralis (18S rRNA) and showed 99% identity (ITS1) with S. stercoralis sequences from geographically distinct locations and host species. The findings are significant with regard to the zoonotic nature of these parasites and might contribute to the conservation of remaining orangutan populations.

show abstract

Comparative Morphology of Six Species of Strongyloides (Nematoda) and Redefinition of the Genus

Cited by 120 publications

References 17 publications

Strongyloides stercoralis found in imported dogs, household dogs and kennel dogs in Iceland

Strongyloides stercoralis found in imported dogs, household dogs and kennel dogs in Iceland

Strongyloides natricissp. n. (Strongyloididae), un nouveau nématode parasite deNatrix maura(L. 1758) (Colubridae) en Espagne

Genetic characterization ofStrongyloidesspp. from captive, semi-captive and wild Bornean orangutans (Pongo pygmaeus) in Central and East Kalimantan, Borneo, Indonesia

Contact Info

Product

Resources

About