Showing papers in "Veterinary Parasitology in 1996"

TL;DR: Neospora caninum is a recently recognized protozoan parasite of animals, which until 1988 was misidentified as Toxoplasma gondii, and its life cycle is unknown.

TL;DR: Immediate, drastic action needs to be implemented, otherwise the sheep industry in this region will soon face a lack of any effective anthelmintics with the inevitable consequences of major restructuring or abandonment.

TL;DR: A nested polymerase chain reaction for detecting Ehrlichia equi in horses and ticks (Ixodes pacificus) was developed and E. equi DNA was detected in blood buffy-coat cells of an experimentally-infected horse on days three through 14 post-inoculation.

TL;DR: Toxoplasma gondii is an important cause of abortion and mortality in sheep and goats throughout the world and it causes mental retardation and loss of vision in congenitally infected children and death in immunosuppressed patients.

TL;DR: It is suggested that chronically infected animals may be tolerant to a moderate superinfection and that the prevailing immune mechanism in operation may be a non-protective response generated by the Th2 lymphocyte subset.

TL;DR: Surveys conducted in the humid topics/sub-tropics of southern Latin America are outlined to assess the significance of resistance to the broad-spectrum anthelmintic groups in nematode parasites of sheep flocks.

TL;DR: Investigation of the infection status and immune responses in 8- to 9-month-old progeny of selected rams from low and high FEC breeding lines confirmed that significantly fewer worms of most of the important abomasal and small intestinal nematode species which infest lambs in New Zealand had established in the LFEC genotypes than in their HFEC counterparts.

TL;DR: Faecal samples from 554 bovines randomly selected at 30 farms in Aragón were examined to investigate the prevalence of Cryptosporidium and Giardia infections, finding infection rates were higher in non-diarrhoeic than in diarrhoeic calves and asymptomatic infection was always correlated with few oocysts in faeces.

TL;DR: The results are consistent with the view that sheep given a choice between two appropriate foods will modify their diet selection in order to moderate the adverse effects of subclinical nematode infection.

TL;DR: Industry may become more interested in biological control considering the increasing problems with parasite resistance to drugs in combination with the increasing cost of developing new chemical products, and because of increasing public concern about chemical residues in animal products and in the environment.

TL;DR: Conventional and coproscopical methods were compared with the polymerase chain reaction (PCR) for the detection of Cryptosporidium oocysts in bovine faeces, with an increase in sensitivity of several orders of magnitude over the conventional corpodiagnostic methods.

TL;DR: Most of the tick species showed a strong preference for some particular sites on the vertebrate body, which could vary according to the host species, and the infestations were generally weak or moderate.

TL;DR: Seven of eight dogs that had been previously infested with Sarcoptes scabiei var.

TL;DR: The results of one experiment indicate that dual resistance of parasites to PP and OBZ also exists, and reduced efficacies were noted for seven species.

TL;DR: The lower concentrations of the gammaglobulins coupled with the pancytopenia suggest that the immune state of thePancytopenic E. canis infected dogs is more compromised, and therefore secondary infections should be expected more frequently in these dogs.

TL;DR: Serum samples from 2000 cows, 3311 sheep and 638 goats from Iran were examined for antibodies to Toxoplasma gondii by use of the latex agglutination (LAT) and indirect hemagglutination tests (IHAT).

TL;DR: The results provide evidence of the toxic effects of excreted ivermectin on key dung-colonising families of insects, and show that fenbendazole lacks such toxic effects.

TL;DR: The method yielded a high worm recovery; all stages were recovered and the recovery percentage was not significantly affected by either the dose of parasites or the time interval from slaughtering to start of incubation.

TL;DR: The level of ovine nematode infections in weaned lambs increased with increasing stocking rate even though pasture production was enhanced by increased rates of fertilizer application, and pasture larval counts and results of tracer lambs indicated a positive relationship between stocking rate and pasture infectivity.

TL;DR: There were disagreements in the declaration of resistance between methods of calculating faecal egg count reduction percentage (FECR%) based on the arithmetic mean and those where geometric mean EPG is used, and inclusion of pre-treatment EPG or control group EPG in the calculation of FECR% influenced declaration of Resistance.

TL;DR: It is demonstrated that suckling Native lambs developed resistance to H. contortus infection during their first exposure to infection at an age when they are considered immune incompetent and colostrally transferred anti-H.contortus immunoglobulin level.

TL;DR: The dot-ELISA may be a useful test to be executed in the field for the diagnosis of canine leishmaniosis because of its easy performance and high sensitivity, even if the test showed a specificity lower than IFA.

TL;DR: The use of computer models to simulate vaccine efficacy in worm control and challenges to the concept of 'hypo-responsiveness' of young lambs will encourage cautious optimism and lively debate as to the prospects for integrated worm control using parasite vaccines.

TL;DR: Moxidectin demonstrated a trend towards greater efficacy against encysted cyathostome larvae than a therapeutic dosage of ivermectin, but this difference was not statistically significant.

TL;DR: Ehrlichia canis, the etiologic agent of canine ehrlichiosis, was isolated in Israel from a naturally infected dog with acute signs of the disease, and was passaged experimentally to a beagle, from which it was propagated in primary canine monocytes.

TL;DR: The antibody reactivity detected against the B. microplus antigen showed that functional antibodies are present in the hemolymph of fully engorged ticks for at least 48 h after completing the parasitic life cycle.

TL;DR: Faecal samples from 620 pigs randomly selected from 27 farms throughout Aragón were examined and Cryptosporidium parvum oocysts were identified, finding infection rates were higher in non-diarrhoeic than in diarrhoeic pigs, in both weaned and fattening pigs.

TL;DR: The results show that pigs inoculated at 49 and 60 days of age became infected to different degrees and reacted differently to the presence of parasites, suggesting that older animals are more resistant to the infection.

TL;DR: E/S antigen gave the best differentiation between sera from tapew Worm-positive and tapeworm-negative horses, and was optimised and validated against seras from horses of known tapew worm status.

TL;DR: The results show high seropposivity in sheep (89%) and lower seropositivity in cattle (58% in 1988, and 57% in 1989) and the seroprevalence in cattle in 1988 was essentially identical to that detected in 1989.