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At least 109 records · Page 6Linked to original sources
PubMed1991

The louse Trinoton anserinum (Amblycera: Phthiraptera), an intermediate host of Sarconema eurycerca (Filarioidea: Nematoda), a heartworm of swans.

The role of the louse Trinoton anserinum (F) as an intermediate host of Sarconema eurycerca (Wehr) was investigated in swans. 8.3% of healthy swans carried one to twelve lice per bird, dispersed contagiously. Injured and lead-poisoned swans were more heavily infected. The mouthparts appear designed to penetrate the hosts' skin; the mandibles are robust and asymmetric, and the maxillae have a serrated intercutting surface. 22% fed exclusively on blood and 33% on both blood and feather. All life-cycle stages fed upon blood and the barbs and barbules from down feathers; hooklets from contour feathers were only found in adults. 9% of lice were infected with developing nematode larvae in the head, thorax or abdomen. Lice labelled with Technetium 99 m moved towards the scapulas and the wings. Lice were found to be highly active and were mobile.

Animals↗
PubMed2002

Pelecitus helicinus Railliet & Henry, 1910 (Filarioidea, Dirofilariinae) and other nematode parasites of Brazilian birds.

We report Pelecitus helicinus Railliet & Henry, 1910 from 13 species of birds of 2 orders and 7 families, collected from the states of São Paulo and Mato Grosso, Brazil. All 13 constitute new host records for this nematode. In addition, we report the first record of Aprocta golvani Diaz-Ungria, 1963 from Brazil and Monasa nigrifrons (Bucconidae), as well as a number of other nematode records from Neotropical birds.

Animals↗
PubMed2000

Two new species of Litomosoides (Nematoda: Filarioidea) in Sigmodontines (Rodentia: Muridae) from Rio de La Plata marshland, Argentina.

Two new species of coelomic filarioid belonging to Litomosoides are described from sigmodontine murids from the Rio de La Plata marshland, Argentina. Litomosoides bonaerensis n. sp., a parasite of Oligoryzomys delticola, belongs to the carinii group and is close to L. silvai, which differs by the head and tail papillae, buccal capsule and cavity, area rugosa, and morphology of the microfilaria. Litomosoides oxymycteri n. sp., from Oxymycterus rufus, belongs to the sigmodontis group. Differential diagnosis is based on the morphology of the buccal capsule, the head and tail papillae, and microfilaria. The ectoparasitic gamasid Ornithonyssus bacoti, in which several Litomosoides species develop, has been recovered from sigmodontines trapped in the study.

Animals↗
PubMed2004

A new species of Pelecitus (Filarioidea: Onchocercidae) from the endangered Tehuantepec jackrabbit Lepus flavigularis.

Pelecitus meridionaleporinus n. sp. from the Tehuantepec jackrabbit is described. The new species differs from Pelecitus helicinus (Molin, 1860) in having delicate transverse striations, a salient vulva, and a readily apparent preesophageal ring; P. helicinus has teardrop cells around the vulva, which are lacking in the species presently described. The new species is different from Pelecitus scapiceps (Leidy, 1886) in having the vulva anterior to the esophageal-intestinal junction and wider lateral alae. Pelecitus scapiceps is found in the tarsal bursa of the hind feet of lagomorphs, whereas P. helicinus is found around tendons of legs and feet of birds. Pelecitus meridionaleporinus n. sp. occurs in the subcutaneous tissue at the base of both ears. This is the second species in Pelecitus Railliet and Henry, 1910 that occurs in New World lagomorphs, and the third found infecting mammals.

Animals↗
PubMed1980

Fat of the wild avian filarial nematode Chandlerella quiscali (Onchocercidae: Filarioidea) in the domestic chicken.

Chandlerella quiscali is a filarial nematode parasitizing the brain of the common grackle (Quiscalus quiscula versicolor), blue jay (Cyanocitta cristata bromia), brown-headed cowbird (Molothrus ater ater), and starling (Sturnus vulgaris). Filarial infections of many wild bird species are common but natural infections of domestic fowl are rare. The habits of many wild birds commonly bring them in close association with domestic poultry. Because of the high prevalence of C. quiscali in grackles (98%) and the pathogenesis it might cause in an unnatural host, this parasite was used to test the receptiveness of the domestic chicken as a host. Microfilariae of C. quiscali were injected into chickens and adult worms were transplanted into the brain or body cavity of other chickens. One group of experimental chickens was immunosuppressed (IS) while another group was not immunosuppressed (NIS). Microfilariae circulated in the blood of IS and NIS chickens for at least 56 days. There was no significant difference in the number of microfilariae recovered from IS and NIS chickens. Adult worms were encapsulated in the brain of NIS chickens and in the body cavity of IS and NIS chickens. Worms survived for 36 hr in the brains of IS chickens. Past 36 hr the worms were shriveled and dead, apparently the result of a physiological and/or nutritional deficiency in the brain.

Animals↗
PubMedDate not supplied

[On Setaria spp; (Nematoda, , Filarioidea, Setariidae) from the peritoneal cavity of equine spp.: two new sub-species, Setaria equina theilerae from wild Zebra of Africa, and Setaria equina dafaallai from horse and donkey of southern Sahara area (author's transl)].

1) Setaria equina (Abildgaard, 1789) is from the Horse and Donkey of Eurasia (and of America and the coastal stripe of North Africa). 2) Setaria equina theilerae n.sub.sp. is from the Zebra of Africa. 3) Setaria equina defaallai n.sub. sp. is from the Horse and the Donkey of southern Sahara area of the Ethiopean Region of Africa, from the Nile valley till to the western coast. 4) Crossing between S. equina and S. e. theilerae may be possible, as their host spp. does with the resultant bastard offspring experimentally.

Africa↗
PubMed2000

Redescription of Parafilaria bovicola Tubangui, 1934 (Nematoda: Filarioidea) from Swedish cattle.

Parafilaria bovicola was introduced into Sweden and identified for the first time in Swedish cattle in 1978. Since then the parasite has become well established and has been responsible for substantial economic losses in Swedish beef production. Although studies have been undertaken on serodiagnosis, life cycle, vector and geographical distribution within Sweden this is the first full description of P. bovicola from Swedish cattle and the first study to use scanning electron microscopy. P. bulgarica Daskalov, 1944 is regarded as a synonym of P. bovicola Tubangui, 1934. Tooth-like thickenings described on the anterior lobes of the oesophagus for the first time may assist the parasite in its migration through the host tissues.

Animals↗
PubMed1975

Rapid morphological transformations of spermatozoa in the uterus of Brugia pahangi (Nematoda, Filarioidea).

Mature, umated male and female Brugia pahangi worms were implanted into the peritoneal cavity of gerbils, allowed to mate, and then recovered and examined by means of electron microscopy. The proximal portion of the uterus of female worms recovered in copula contained a morphologically heterogenous population of sperm ranging from a rigid, nonmotile form to the mature ameboid sperm. The immotile sperm are identical in morphology to sperm found within the seminal vesicle of the male. The in utero transformations occur in less than 1 hr, and probably represent a final maturation event preceding competency to fertilize eggs. First in the sequence of events leading to the mature spermatozoon is a decrease in the density of the cytoplasmic matrix concomitant with the elaboration of an abundant tubular smooth endoplasmic reticulum. The position and appearance of the sperm in the uterus suggest that the formation of this membranous system occurs within minutes and involves de novo assembly from cytoplasmic precursors. Following the appearance of the tubular membranous system, certain other membranous organelles become spherical, fuse with the plasmalemma, and release their electron-dense contents into the lumen of the uterus. Filamentous rodlike elements, previously extending the length of the peripheral cytoplasm, begin to disintegrate and cytoplasmic projections form at the margins of the cell. Polarization of the sperm results from the aggregation of mitochondria, nuclear material, endoplasmic reticulum, and membranous organelles at one pole of the cell leaving an organelle-free filamentous pseudopod at the other.

Animals↗
PubMed1975

The ultrastructure of adult Brugia malayi (Brug, 1927) (Nematoda: Filarioidea).

The ultrastruct of the adult subperiodic Brugia malayi (Brug, 1927) within pulmonary arteries of male jirds (Meriones unguiculatus) was studied by transmission electron microscopy. The cuticle consists of 10 sublayers (2 of which are prominently banded) and a typical outer unit membrane. Evidence is presented showing that the subcuticular region of the lateral chords comprises a functional complex of basal infoldings, multivesicular bodies, and associated mitochondria, which is probably engaged in the exchange of solutes across a permeable cuticle. Microbodies with paired, prominent cores, intracisternal A-particle viruslike bodies, nonstaining glycogen patches, and other structures are also present in the lateral chords. The platymyarian somatic musculature shares some coelomyarian characteristics, e.g., apparent neuromuscular connections and prominent glycogen deposits surrounded by mitochondria and other organelles. The alimentary tract has features typical of many nematodes. The luminal segments of the male and female reproductive tracts and their germinal products, excluding microfilariae, are described. Affinities with related species are discussed.

Animals↗
PubMed1992

Course of antibody production by the DIG-ELISA method in neonatally infected and juvenile infected rats after primary infection with Breinlia booliati (Filarioidea: Onchocercidae).

The course of antibody production in Wistar neonatal and juvenile rats after primary infection with Breinlia booliati was studied by the DIG-ELISA technique using filter papers impregnated with capillary blood drawn from the infected rat tails at 7, 14, 28, 60 and 90 days post infection. Sera of neonatally infected rats did not react with adult worm antigen until day 7 and the titers of antibody remained at very low levels for the next 7 days. There was little tendency to eliminate the filarial larvae during this time. The antibody levels then rose rapidly throughout the next fortnight and increased to a maximum at day 60 after which the titer leveled out at a constant high value until early patency at day 90. On the other hand, antibodies could be detected in sera of juvenile infected rats as early as day 7 and the levels of antibody rose markedly to a maximum at day 28. During the period from day 60 to day 90 at early patency, the antibodies declined gradually to lower levels. The humoral immune responses of 42 neonatally infected rats and 53 juvenile infected rats of 3 strains (Lewis, Wistar and Sprague Dawley) were tested against soluble B. booliati antigens from both female (1:50) and male (1:10) worm extracts by the DIG-ELISA method. Antibodies were detected in sera from all the microfilaremic and amicrofilaremic rats belonging to neonatally and juvenile infected groups. Sera of clean neonatal rats did not give a positive reaction zone.

Age Factors↗