Haplodiploidy in Aspiculuris tetraptera (Nitzch) (Heteroxynematidae) and Syphacia obvelata (Rudolphi) (Oxyuridae), nematode (Oxyurida) parasites of Mus musculus

1984 ◽  
Vol 62 (5) ◽  
pp. 804-807 ◽  
Author(s):  
Martin L. Adamson
Keyword(s):  
Mus Musculus ◽  
Chromosome Numbers ◽  
In Utero ◽  
Maturation Division ◽  
The Common ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

Cytological aspects of gametogenesis are studied in the common oxyuroid (Nematoda) parasites of Mus musculus, Syphacia obvelata (Oxyuridae) and Aspiculuris tetraptera (Heteroxynematidae). Both species are shown to be haplodiploid: males develop from unfertilized eggs and are haploid and females develop from fertilized eggs and are diploid. In female A. tetraptera there are 12 chromosomes in oogonial divisions; meiosis is normal and six bivalents were observed in ova. There are two maturation divisions and embryos in eggs in utero contain 6 or 12 chromosomes. In males, there are six chromosomes in spermatogonial divisions; there is a single maturation division and all spermatozoa have six chromosomes. Gametogenesis was similar in Syphacia obvelata but the chromosome numbers are four in males and eight in females.

scholarly journals Helminth fauna of Mus musculus Linnaeus, 1758 from the suburban area of Belgrade, Serbia

2008 ◽  
Vol 60 (4) ◽  
pp. 609-617 ◽  
Author(s):  
D.S. Kataranovski ◽  
Olivera Vukicevic-Radic ◽  
Milena Kataranovski ◽  
Dusica Radovic ◽  
Ivana Mirkov
Keyword(s):  
Mus Musculus ◽  
Infection Intensity ◽  
Nematode Species ◽  
Helminth Fauna ◽  
Suburban Area ◽  
Trichuris Muris ◽  
Heligmosomoides Polygyrus ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera ◽  
Taenia Taeniaeformis

The helminth fauna of the house mouse (Mus musculus Linnaeus, 1758) was studied on the basis of 429 host individuals from the suburban area of Belgrade. Eleven helminth species were recorded: three cestode species - Catenotaenia pusilla, Rodentolepis fraterna, and Cysticercus (= Strobilocercus) fasciolaris [larval stage of Taenia taeniaeformis (Batsch, 1821)]; and eight nematode species - Heligmosomoides polygyrus, Syphacia sp., Aspiculuris tetraptera, Syphacia obvelata, Heterakis spumosa, Trichuris muris, Mastophorus muris, and Gongylonema sp. Within the general helminth fauna, H. polygyrus was found to be the most prevalent species (39.2%) and caused the highest infection intensity. Prevalences of A. tetraptera, C. pusilla, and S. obvelata ranged from 12.8% to 6.1%, while the remaining species showed prevalences ranging from 4.9% (for Syphacia sp.) to 0.2% (for Gongylonema sp.). All the species found in males were also present in females, with the exceptions of M. muris and Gongylonema sp. No significant differences were found between males and females regarding prevalence (P%), mean infection intensity (MI), or mean abundance (MA).

scholarly journals Aspiculuris tetraptera in wild Mus musculus. The prevalence of infection in male and female mice

1975 ◽  
Vol 49 (2) ◽  
pp. 85-90 ◽  
Author(s):  
Jerzy M. Behnke
Keyword(s):  
Small Mammals ◽  
Mus Musculus ◽  
Mouse Population ◽  
Male And Female ◽  
Female Mice ◽  
Distribution Studies ◽  
Syphacia Obvelata ◽  
Regent's Park ◽  
Aspiculuris Tetraptera ◽  
Wild House Mouse

AbstractA survey was carried out of the levels of infection with Aspiculuris tetraptera and Syphacia obvelata in a wild house mouse population living in the Charles Clore Small Mammals Pavilion at the London Zoo in Regent's Park. The extent of infection with A. tetraptera is analysed according to the sex of the host. It is shown that the prevalence of infection was greater in male than in female mice and frequency distribution studies suggest that this is not only because fewer female mice become infected but also because females resist larvae more effectively than do males.

scholarly journals OCURRENCIA DE NEMATODOS GASTROINTESTINALES ASPICULURIS TETRAPTERA (NITZSCH, 1821) SCHULZ, 1927 Y SYPHACIA OBVELATA RUDOLPHI, 1802 EN MUS MUSCULUS LINNAEUS, 1758 EN BIOTERIOS DE INVESTIGACION EN MEXICO

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
Mayra I Grano-Maldonado
Keyword(s):  
Mus Musculus ◽  
Hymenolepis Nana ◽  
Distribución Geográfica ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

El ratón común Mus musculus Linnaeus, 1758 es empleado comúnmente como modelo de investigación en las ciencias veterinarias y biomédicas. Cuarenta organismos fueron colectados en cuatro diferentes bioterios de la Universidad Nacional Autónoma de México y fue evaluada la presencia de parásitos. La examinación intestinal reveló al nematodo Aspiculuris tetraptera (Nitzsch, 1821) Schulz, 1927 (n=104) y Syphacia obvelata Rudolphi, 1802 (n=1582). El análisis estadístico determinó que no hay preferencia parasitaria por sexo del hospedero. Se registró al cestodo Rodentolepis nana (Siebold, 1852) sinónimos (Hymenolepis nana y Vampirolepis nana) que son causantes de cestodiasis en el humano. Este trabajo tiene un énfasis en estos helmintos debido a su potencial zoonótico. No se detectó la presencia de ectoparasitos. Se elaboró un reporte del registro de parásitos en roedores de bioterio en México obtenido de una base de datos de la Colección Nacional de Helmintos del Instituto de Biología de la Universidad Nacional Autónoma de México. Este es un primer registro preliminar de la ocurrencia del nematodo A. tetraptera y S. obvelata en el ratón común M. musculus en cuatro bioterios en la ciudad de México. Este trabajo amplía la distribución geográfica y contribuye también, a un nuevo registro del parásito.

scholarly journals Aspiculuris tetraptera in wild Mus musculus. Age resistance and acquired immunity.

1976 ◽  
Vol 50 (3) ◽  
pp. 197-202 ◽  
Author(s):  
M. Behnke Jerzy
Keyword(s):  
Mus Musculus ◽  
Worm Burden ◽  
Acquired Resistance ◽  
Age Groups ◽  
Acquired Immunity ◽  
House Mice ◽  
Wild House Mice ◽  
The Mean ◽  
Aspiculuris Tetraptera

AbstractWild house mice, naturally infected with Aspiculuris tetraptera were segregated according to their weight into six age groups. The prevalence of infection and the mean worm burden of these mice were studied in the different age groups. The overall prevalence of infection was high (57% or more) in all the groups except the youngest. Mice acquired larvae soon after weaning; the highest larval burdens were reached in juvenile mice and the highest mature worm burdens, a group later, in mature mice. Older mice had fewer larvae and fewer mature worms. The mature worm burdens decreased but relatively slower than the larval burdens. It is suggested that either innate or acquired resistance could account for these observations.

Effective eradication of pinworms (Syphacia obvelata and Aspiculuris tetraptera) with Polygonum cognatum Meissn

2019 ◽  
Vol 196 ◽  
pp. 63-67 ◽  
Author(s):  
Fatma Tuğçe Gürağaç Dereli ◽  
Mert Ilhan ◽  
Esma Kozan ◽  
Esra Küpeli Akkol
Keyword(s):  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

scholarly journals Sanitary profile in mice and rat colonies in laboratory animal houses in Minas Gerais: I - Endo and ectoparasites

2007 ◽  
Vol 59 (6) ◽  
pp. 1478-1484 ◽  
Author(s):  
K.A. Bicalho ◽  
F.T.M. Araújo ◽  
R.S. Rocha ◽  
O.S. Carvalho
Keyword(s):  
Physical Environment ◽  
Minas Gerais ◽  
Public Institutions ◽  
Hymenolepis Nana ◽  
Syphacia Muris ◽  
Syphacia Obvelata ◽  
Animal House ◽  
Aspiculuris Tetraptera ◽  
Giardia Muris ◽  
Sanitary Conditions

The sanitary conditions of 13 animal houses in nine public institutions in Minas Gerais, and the presence of endo and ectoparasites of mice and rats colonies kept in these facilities were evaluated. Data about barriers to prevent the transmission of diseases and a program of sanitary monitoring were obtained through a questionnaire and local visit. Parasitological methods were performed for diagnosing mite, lice, helminthes, and protozoa parasites in 344 mice and 111 rats. Data have shown that the majority of the animal houses had neither proper physical environment nor protection barriers to prevent the transmission of infections. Parasitological results have shown that only one animal house (7.7%) had parasite free animals, whereas the others have presented infected animals and the prevalences of parasites in the mice colonies were: Myobia musculi (23.1%); Myocoptes musculinus (38.5%); Radfordia affinis (15.4%); Syphacia obvelata (92.3%); Aspiculuris tetraptera (23.1%); Hymenolepis nana (15.4%); Spironucleus muris (46.2%); Giardia muris (46.2%); Tritrichomonas muris (53.8%); Trichomonas minuta (61.5%); Hexamastix muris (7.7%); and Entamoeba muris (84.6%). As for the rat colonies, the prevalences were: Poliplax spinulosa (8.1%); Syphacia muris (46.2%); Trichosomoides crassicauda (28.6%); Spironucleus muris (85.7%); Tritrichomonas muris (85.7%); Trichomonas minuta (85.7%); Hexamastix muris (14.3%) and Entamoeba muris (85.7%).

Measurement of umbilical blood flow in fetal lambs in utero

1975 ◽  
Vol 39 (6) ◽  
pp. 1056-1059 ◽  
Author(s):  
W. Berman ◽  
R. C. Goodlin ◽  
M. A. Heymann ◽  
A. M. Rudolph
Keyword(s):  
Blood Flow ◽  
In Utero ◽  
Flow Measurements ◽  
Flow Transducer ◽  
Descending Aorta ◽  
Electromagnetic Flow ◽  
Umbilical Blood ◽  
The Common ◽  
Umbilical Blood Flow ◽  
Umbilical Arteries

We continuously measured umbilical blood flow in fetal lambs in utero by placing an electromagnetic flow transducer around the common umbilical artery. Umbilical arteries originate from a short common segment as the terminal branches of the descending aorta. This segment was isolated by a retroperitoneal surgical approach and encircled with a specially constructed electromagnetic flow transducer. Catheters were also placed in fetal vessles to monitor pressure and derive flow values by the radionuclide-labeled microsphere technique. The fetus and ewe were allowed to recover for two days before studies were performed. Average umbilical blood flow obtained in 11 animals with the transducer was 199 ml/kg per min. In seven animals flow measurements obtained with the transducer were compared with those derived from microsphere injections. Paired measurements varied by an average of only 5.3%. This technique makes possible the accurate and instantaneous measurement of umbilical blood flow in fetal lambs in utero over a prolonged period.

Studies on the function of the oxyurid egg-shell

Parasitology ◽  
1980 ◽  
Vol 81 (1) ◽  
pp. 103-113 ◽  
Author(s):  
D. A. Wharton
Keyword(s):  
Embryonic Development ◽  
Water Loss ◽  
Complex Structure ◽  
Permeability Barrier ◽  
Lipid Layer ◽  
Insect Eggs ◽  
Egg Shells ◽  
Syphacia Obvelata ◽  
Egg Shell ◽  
Aspiculuris Tetraptera

SUMMARYThe egg-shell of Hammerschmidtiella diesingi and Aspiculuris tetraptera reduces the rate of water loss from the egg when exposed to desiccation. Staining of the enclosed larva by acid fuchsin and the collapse of eggs exposed to desiccation indicate that the permeability barrier is heat labile. This suggests that the lipid layer is the main permeability barrie of the shell. The complex structure of the uterine layers has a similar morphology to the respiratory structures of the chorion of some insect eggs. Reflections from the shell, the rate of embryonic development under various conditions and the penetration of lead ions indicate that the shell does not trap a layer of air when immersed in water and the uterine layers cannot, therefore, function as a plastron network. Calculations indicate that if diffusion is limited to the pores in the external uterine layer, the area available for gaseous exchange is reduced by 85·5% in H. diesingi, 95·6% in A. tetraptera and 96·8% in Syphacia obvelata. It is suggested that the uterine layers of oxyurid egg-shells function in a similar fashion to the pores in bird egg-shells and the aeropyles in the chorion of insect egg-shells which do not possess plastron networks. These structures reduce water loss from the egg whilst ensuring an adequate supply of oxygen for embryonic development.

Continuous feed medication with thiabendazole for the removal of Hymenolepis nana, Syphacia obvelata and Aspiculuris tetraptera in naturally infected mice

1975 ◽  
Vol 49 (3) ◽  
pp. 173-177 ◽  
Author(s):  
L. F. Taffs
Keyword(s):  
High Activity ◽  
Inbred Strain ◽  
Treatment Period ◽  
Day Treatment ◽  
Post Mortem ◽  
Hymenolepis Nana ◽  
Single Drug ◽  
Continuous Feed ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera

AbstractA medicated diet containing 0.3% thiabendazole fed continuously to 26 mice for 7 days removed 9 out of 11 (82%) Hymenolepis nana, (one tapeworm remaining in each of two mice), 17 out of 17 (100%) Syphacia obvelata and 8 out of 8 (100%) Aspiculuris tetraptera infections. By contrast in 26 non-treated mice 9 out of 10 Hymenolepis, 17 out of 18 Syphacia and 8 out of 8 Aspiculuris infections persisted through the 7 day treatment period, and at post mortem examination 38 Hymenolepsis, 1,562 Syphacia and 4,911 Aspiculuris worms were recovered. In a second experiment 100% removal of 23 Hymenolepis and 20 Syphacia infections was obtained after 14 days medication of 38 mice. High activity against both roundyvorms and tapeworms of mice was thus obtained using one single drug. Some unexplained deaths amongst inbred strain C3H/Hef Nimr mice occurred within seven day's of the continuous medication.

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