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At least 343 records · Page 19Linked to original sources
PubMedDate not supplied

[A new mexican species of Dichotomius Hope (Coleoptera: Scarabaeidae) and a key to species of the carolinus group].

A new species of Dichotomius Hope is described based on specimens from states of Yucatan and Quintana Roo, Mexico. Dichotomius maya n. sp. is included in a new key to species of the carolinus group, which comprises besides new species described herein, the following species with North American and Central American distribution: D. carolinus L., D. colonicus (Say), D. annae Kohlmann & Solis and D. amicitiae Kohlmann & Solis.

Animals↗
PubMed2002

Two new species of the genus Periglischrus (Acari: Mesostigmata: spinturnicidae) on two bat species of the genus tonatia (Chiroptera: Phyllostomidae) from southeastern Mexico, with additional data from Panama.

Two new species of spinturnicid mites of the genus Periglischrus are described and illustrated from phyllostomid bats from southeastern Mexico: The female, male, and protonymph of Periglischrus steresotrichus, new species, from Tonatia evotis Davis & Carter, and the female and male of Periglischrus eurysternus, new species, from Tonatia saurophila Koopman & Williams. A supplementary description of the male deutonymph of P. eurysternus from T. saurophila from Panama is given. The morphological features of the two new species of Periglischrus are used as a basis for discussing their phylogeny and its potential relationship to that of their hosts.

Animals↗
PubMed2003

Eimeria species from serows (Capricornis spp.) in Japan with descriptions of two new species.

Fresh fecal samples from 35 Japanese serows Capricornis crispus (Temminck, 1845), and 5 Formosan serows Capricornis swinhoei Gray, 1862, were collected between October 1998 and March 1999. Eimeriid coccidians were found in 12 (34%) Japanese serows and in 1 (20%) Formosan serow. Three Eimeria species were found, and 2 are described here as new. The third species is consistent with the description of Eimeria kamoshika Inoue, 1989. Sporulated oocysts of 1 new species are broadly ellipsoidal, 20.7 x 16.8 microm (18-23 x 14-19 microm) with a length (L):width (W) ratio of 1.2 (1.1-1.4); these lack a micropyle (M) and oocyst residuum (OR) but 1-2 polar granules (PGs) are sometimes present. Sporocysts are elongate-ellipsoidal, 10.5 x 5.9 microm (9-13 x 5-7 microm), with a L/W ratio of 1.8 (1.5-2.4), and have a Stieda body (SB) and sporocyst residuum (SR). Oocysts of the second new species are broadly ovoidal, 28.2 x 22.0 microm (25-33 x 19-23 microm), with a L/W of 1.3 (1.1-1.5), and have a M at the slightly pointed end, but lack an OR and PG. Sporocysts are ellipsoidal, 12.9 x 8.1 microm (11-15 x 7-10), with a L/W of 1.6 (1.3-1.9), and have a SB and SR.

Animals↗
PubMed2003

Eimeria species from Cryptotis shrews (Insectivora: Soricidae) with description of a new species.

Fresh fecal samples from 12 shrews, 10 Cryptotis goodwini Jackson, 1933, and 2 Cryptotis merriami Thomas, 1898, were collected between December 1994 and May 1998; 11 (92%) were positive for eimeriid coccidia, including 8 of 8 C. goodwini and 2 of 2 C. merriami from Honduras and 1 of 2 C. goodwini from Guatemala. Two Eimeria species were found: 1 is consistent with the description of Eimeria whitakeri Upton and McAllister, 1991, and 1 is described in this study as new. Sporulated oocysts of the new species are subspheroidal, 16.8 x 15.7 (14-20 x 15-19) microm, with a length-width (L/W) ratio of 1.1 (1.0-1.2); they lack a micropyle and oocyst residuum, but 1-2 polar granules are always present. Sporocysts are elongate and ovoidal, 8.4 x 6.0 (6-10 x 4.5-7.5) microm, with a L/W ratio of 1.4 (1.2-1.7) and have a Stieda body and sporocyst residuum. This is the 49th Eimeria species described from all Insectivora but only the third from Cryptotis species.

Animals↗
PubMed2005

New species of Oswaldocruzia (Nematoda: Molineoidae), new species of Rhabdias (Nematoda: Rhabdiasidae), and other helminths in Rana cf. forreri (Anura: Ranidae) from Costa Rica.

Oswaldocruzia costaricensis n. sp. (Strongylida: Molineidae) from the intestines and Rhabdias savagei n. sp. (Rhabditida: Rhabdiasidae) from the lungs of Rana cf. forreri (Anura: Ranidae) are described and illustrated. Oswaldocruzia costaricensis represents the 77th species assigned to the genus and differs from the other Neotropical species in the genus by possessing a Type II bursa and long cervical alae. Rhabdias savagei represents the 47th species assigned to the genus and differs from other Neotropical species in the genus by possession of 4 lips and a postequatorial vulva. Rana cf. forreri was also found to harbor the trematodes, Haematoloechus parcivitellarius and Megalodiscus temperatus, the nematodes, Aplectana incerta, Aplectana itzocanensis, Cosmocerca podicipinus, Foleyellides striatus, Subulascaris falcaustriformis, and a larva of the nematode Brevimulticaecum sp. Cosmocerca panamaensis is considered to be a synonym of Cosmocerca podicipinus.

Animals↗
PubMed2006

Reconsideration of the longiceps species group of the feather louse genus Columbicola (Phthiraptera: Philopteridae) with descriptions of two new species.

We reconsidered the composition of the longiceps species group within Columbicola. Based primarily on head shape, the group is divided into the longiceps and the cavifrons groups, with 7 species in the former and 5 in the latter. Two new species are described: Columbicola claytoni (type host: Ducula rufigaster [Quoy and Gaimard]) and Columbicola malenkeae (type host: D. pacifica [J. E. Gmelin]). Columbicola wolffhuegeli (Eichler) is removed from synonymy with Columbicola longiceps (Rudow) and is recognized as a valid species. The true host for Columbicola paradoxus Tendeiro has been determined as Lopholaimus antarcticus (Shaw).

Animals↗
PubMed1991

Seroprevalence of ovine progressive pneumonia virus in various domestic and wild animal species, and species susceptibility to the virus.

Ovine progressive pneumonia is caused by a lentivirus of known infectivity only for sheep and goats. Virus susceptibility of 11 other species of animals was examined. Species included cattle, chickens, deer, dogs, goats, hamsters, horses, mice, pigs, rabbits, and rats. Of these species, only goats and rabbits could be experimentally infected with the virus. The infection in rabbits was acute, and virus did not persist or induce antibody production as it does in sheep and goats. Sera obtained from several people working in close contact with the virus and from several wild species, with unknown exposure history, were tested for antibodies to viral antigens. All results were negative. Knowledge of the host range of this virus is important for scientific studies and for virus eradication programs.

Animals↗
PubMedDate not supplied

[Incidence of Chlamydia trachomatis, Ureaplasma urealyticum, Mycoplasma species, Streptococci of the Lancefield group B and Candida species in newborn infants during the first week of life].

In a total of 200 children born at Würzburg University Gynecological Clinic, culture and in some cases microscopic investigations were performed in the first week of life to identify chlamydia trachomatis, ureaplasma urealyticum, mycoplasma species, Lancefield group B streptococci and candida species. Chlamydia trachomatis was isolated in one symptom-free neonate, while ureaplasma urealyticum was found in 31 (15%) of the infants. Statistically, premature rupture was significantly more frequent (29%) in the ureaplasma-urealyticum-positive group than among the ureaplasma-urealyticum-negative infants (11%) (p less than 0.05). Mycoplasma species was detected in one newborn, Lancefield group B in 3 (1.5%). In 7 of the infants (3.5%) Candida species was isolated.

Bacterial Infections↗
PubMed1994

A new species of Oesophagostomoides (Nematoda: Cloacinidae) from the northern hairy-nosed wombat Lasiorhinus krefftii with a key to species of the genus.

Lasiorhinus krefftii, the northern hairy-nosed wombat, is a rare and endangered marsupial existing as a single population in the Epping Forest National Park, Queensland, Australia. Dissection of a juvenile wombat that had died from natural causes revealed the presence in the colon of a new species of Oesophagostomoides Schwartz, 1928, a genus found only in wombats (Vombatidae, Marsupialia). Oesophagostomoides eppingensis n. sp. differs from the other species in the genus in the length of spicule, form of the dorsal ray, length of the vagina, and proportions of the female's posterior end. Morphological similarities between species suggest that there may have been switching of the species of Oesophagostomoides between L. krefftii and Vombatus ursinus (the common wombat). The potential contribution of colon parasites to the energy budget of wombats may be of importance when determining conservation management strategies for L. krefftii.

Animals↗
PubMed1996

A multivariate analysis of morphometric characters of Heterorhabditis species (Nemata: Heterorhabditidae) and the role of morphometrics in the taxonomy of species of the genus.

A multivariate analysis on the morphometrics of 7 Heterorhabditis species was conducted to review the status of the traditional morphometric characterization methods for differentiating species of these nematodes. Results from this study showed consistency in the selection of morphometric characters for discriminating among males and infective juveniles of Heterorhabditis species. For the males, testis reflexion (TREF) and total length (LENGTH) were the variables that contributed most in the discrimination among the different species, and for the infective juveniles, tail length (TAILL) and total length (LENGTH) were the variables that contributed most. Therefore, we consider that these morphometric characters are useful and reliable, and that they should be used for the identification of Heterorhabditis species/isolates.

Animals↗
PubMed1997

[Study on the recognition and evolutionary genetics of the courtship song of species in Drosphila nasuta species subgroup].

The subgroup of Drosophila nasuta consists of 14 species, subspecies and taxa. It has a wide distribution in area of Indo-Pacific Ocean. The courtship song of species in nasuta subgroup is recorded for the first time in the paper. Some parameters of temporal pattern of pulse song were measured: the inter burst interval (IBI), the interpulse interval (IPI), the length of a pulse train (PTL), the number of pulses in a train (PN), the length of a pulse (PL) and the length of a cycle (CL). Computer analysis techniques were used to make spectral analysis of sine song. A three-dimensional power spectra of the sound was made. In this subgroup, the male of D. pulauna and Taxon-F didn't produce any sound signals during courtship, suggesting that the visual stimuli play an important role in mating process. By analysing the courtship sound signals of other species, subspecies and taxa, the sounds produced by courting male could be described as pulse song or as sine song. By studying the sounds of intra- or interspecific F1 hybrids we have found that the parameters of the temporal pattern of pulse song, for example, the mean value of IPI is controlled by X-linked and autosomal polygene and the sine song frequency is predisposed to the maternity. The phylogenetic tree of the subgroup is constructed based on the temporal pattern of the pulse sounds in different species, subspecies and taxa. The relationship within the members of the Drosophila nasuta subgroup is discussed.

Animals↗
PubMed1998

A new Eimeria species (Apicomplexa: Eimeriidae) infecting Onychomys species (Rodentia: Muridae) in New Mexico and Arizona.

Fecal samples from 3 species of Onychomys (Rodentia: Muridae) captured in New Mexico and Arizona were examined for coccidia. Six of the 59 (10%) were infected with a new species of Eimeria. Sporulated oocysts (n = 105) of this new species are subspheroidal, 17.4 x 16.1 (14-21 x 13-19) microm, with ellipsoidal sporocysts 10.4 x 5.7 (9-12 x 5-8) microm. This species occurred in 3 of 24 (13%) Onychomys arenicola, 2 of 31 (6%) Onychomys leucogaster from New Mexico, and 1 of 4 (25%) Onychomys torridus from Arizona. Isolates recovered from O. leucogaster and O. torridus were inoculated into O. leucogaster (n = 5) and produced infections with a prepatent period of 7 days and a patent period of 7-23 days.

Animals↗
PubMed2001

Species-specific PCR for the identification of ovine, porcine and chicken species in meta and bone meal (MBM).

BSE, first identified in the UK in 1986 is thought to have arisen from feeding scrapie infected Meat and Bone Meal (MBM), produced under sub-optimal conditions, to cattle. For quality and safety reasons there is a requirement for a good analytical test for the surveillance of processed MBM. This study describes species-specific PCR assays for the identification of ovine, porcine and poultry species in MBM. A comparison between two distinct DNA extraction methods, i.e. the silicaguanidiumthiocyanate DNA isolation procedure and a commercial DNA extraction kit, is also presented. Application of this technology to species identification in industrial MBM was investigates as part of this study.

Animal Feed↗
PubMed2005

Copper toxicity to different field-collected cladoceran species: intra- and inter-species sensitivity.

The acute copper sensitivity of 44 European freshwater cladocerans, from four families (Daphniidae, Bosminidae, Macrothricidae, Chydoridae) and 13 genera (Daphnia, Ctenodaphnia, Ceriodaphnia, Simocephalus, Scapholeberis, Bosmina, Acantholeberis, Alona, Acroperus, Chydorus, Eurycercus, Disparalona and Pleuroxus) were assayed. The 48-h EC(50)s of field-collected organisms tested in reconstituted standard laboratory water ranged from 5.3 to 70.6 mug Cu L(-1). Only among Ctenodaphnia were significant intra-species differences observed. Significant inter-species differences were noted among Alonina and Daphnia. Between all genera tested, a maximum of a 12-fold difference in copper sensitivity was noted. Most animals were more sensitive than a laboratory D. magna clone. A weak non-significant increasing trend was noted between mean cladoceran 48-h EC(50) and ambient copper concentration of the different aquatic systems, suggesting acclimation/adaptation in the field. A positive relationship was also observed between the 48-h EC(50) of the field-collected cladoceran species (without the Chydoridae family) and the size of the organisms.

Adaptation, Physiological↗
PubMed2004

Ratios between number of neuroglial cells and number and volume of nerve cells in the spinal ganglia of two species of reptiles and three species of mammals.

We studied the ratios between number of neuroglial (=satellite) cells and number and volume of neurons with which they are associated in the spinal ganglia of two species of reptiles (lizard and gecko) and three species of mammals (mouse, rat, and rabbit). In all five species, we found that the number of satellite cells associated with a nerve cell body increased with increasing volume of the latter. This result shows that there is a quantitative balance between neuroglia and nerve tissue in spinal ganglia. This balance seems to be maintained by a tight regulation of the number of satellite cells. We also found that the mean volume of nerve cell body corresponding to a satellite cell was lower for small neurons than for large ones. Since satellite cells metabolically support spinal ganglion neurons, the metabolic needs of small neurons are better satisfied than those of large ones. For a nerve cell body of a given size, the number of associated satellite cells did not differ between the lizard and gecko, nor between the mouse, rat, and rabbit. However, this number was significantly smaller in the reptiles than in the mammals. This result could be explained by the lower metabolic rate in the nervous system of poikilotherms than mammals, or could have a phylogenetic significance. These two interpretations are not mutually exclusive.

Animals↗
PubMed1999

ITS2 sequences of Dictyocaulus species from cattle, roe deer and moose in Sweden: molecular evidence for a new species.

Total DNA was isolated from adult lungworms of the genus Dictyocaulus, collected from cattle, moose (Alces alces) and roe deer (Capreolus capreolus) in Sweden. The second ribosomal internal transcribed spacer was amplified with PCR, and DNA sequences were determined from nine individual worms that all came from different hosts in order to avoid analysis of siblings. The sequence data obtained were aligned and compared with similar data derived from German lungworm isolates from cattle and fallow deer (Cervus dama). These analyses clearly showed that specimens of the cattle lungworm, Dictyocaulus viviparus, were almost identical irrespective of their geographical origin. However, when the second internal transcribed spacer sequence of D. viviparus was compared with that of lungworms from moose and roe deer, major differences were noticed. Although lungworms collected from these cervids had identical second internal transcribed spacer sequences, they proved to be genetically different from Dictyocaulus eckerti of German fallow deer, displaying a 66.5% similarity. In an evolutionary tree, inferred by maximum likelihood analysis, the Dictyocaulus species from cattle and wild cervids clustered as compared with Dictyocaulus filaria from sheep. The study has thus demonstrated that A. alces and C. capreolus in Sweden are parasitised with a Dictyocaulus species that is different from D. viviparus and D. eckerti, indicating that we are dealing with a new species in moose and roe deer.

Animals↗
PubMed2003

PCR-RFLP using Ssu-rDNA amplification as an easy method for species-specific diagnosis of Trypanosoma species in cattle.

A single polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP) assay was used to characterise all important bovine trypanosome species. This is the first report of a sensitive pan-trypanosome PCR assay amplifying all species including T. vivax to a comparable extent using a single primer pair. A semi-nested PCR approach resulted in the detection of one T. congolense trypanosome genome/40 microl of blood, applied as buffy coat on filter paper. Restriction enzyme analysis using Msp1 and Eco571 gave a clear distinction between T. congolense, T. brucei, T. vivax and T. theileri. Several subgroups within the T. congolense group could be distinguished but no differences between the species belonging to the subgenus Trypanozoon or between T. simiae and T. theileri could be found. The use of MboII restriction enzyme allowed differentiation between T. simiae and T. theileri. The potential of the essay to be used as a suitable diagnostic tool is discussed.

Animals↗
PubMed2003

Pythium glomeratum, a new species isolated from agricultural soil taken in north-eastern France, its ITS region and its comparison with related species.

Pythium glomeratum sp. nov. is described here. It was isolated from soil samples taken in the northern France in 1992, was wrongly identified as Pythium heterothallicum and was kept aside. Recently, the ITS region of the rDNA of this oomycete was amplified and sequenced. The differences between the sequence and a more detailed study of the morphological characters of these two species, revealed that both are related but different species. P. glomeratum is characterized by the presence of branched antheridia that wrap around the oogonia, aplerotic to almost plerotic oospores, and the lack of zoosporangia and zoospores. Taxonomical description of this new species, its comparison with related oomycetes, polymerase chain reaction (PCR) amplification of the internal transcribed region (spacers ITS1, ITS2, and the gene 5.8S) of its ribosomal nuclear DNA and the nucleotide sequence of this region are given here.

Base Sequence↗