Informes o documentos de trabajo
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Browsing Informes o documentos de trabajo by Author "Abaigar, Teresa"
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- PublicationEmbargoEffect of different methods of administration of ivermectin on its efficacy against the shedding of gastrointestinal nematode eggs by gazelles(Wiley, 2001-07-07) Ortiz Sánchez, Juana; Ruiz de Ybáñez Carnero, María del Rocío; Abaigar, Teresa; Goyena, Marina; Espeso, Gerardo; Cano, Mar; Alonso de Vega, Francisco; Sanidad AnimalSeven different methods of administering ivermectin to gazelles were compared: subcutaneous injection, direct oral administration, administration in individual feeds, administration in a herd feed, direct oral administration of a second ivermectin formulation, administration in individual water supplies, and administration in the herd's water supply. The first five treatments were effective, as monitored by faecal egg count reduction tests, and administration in individual feeds or in a herd feed avoided the need to capture the animals, with the attendant risk of mortality. Of the factors associated with the recipients (species, sex, age and inbreeding coefficient) age was the only significant factor for the efficacy of the treatment. Oral or subcutaneous, individual or collective, and direct or indirect administrations were equally satisfactory for the treatment of all the parasite groups studied. Only when parasitic problems were due to Nematodirus species did direct administration to individual animals appear to be preferable.
- PublicationOpen AccessOral administration of mebendazole failed to reduce nematode egg shedding in captive African gazelles(AOSIS Publishing, 2000-11-24) Ortiz Sánchez, Juana; Ruiz de Ybáñez Carnero, María del Rocío; Abaigar, Teresa; Garijo, M. Magdalena; Espeso, Gerardo; Cano, Mar; Sanidad AnimalIdiosyncracies are observed in captive wild animals as regards the pharmacokinetics and efficacy of anthelmintics. This could be attributed to such factors as differences in host's metabolism, irregular distribution of anthelmintics due to the way they are administered and worm resistance to anthelmintics. Previously mebendazole was found to be poorly effective when administered in feed. An experiment was conducted to evaluate the efficacy of mebendazole when administered at the dosage rate of 15-20 mg/kg body weight to gastrointestinal nematodes in captive gazelles. Fifty-eight adult gazelles (Gazella cuvien) were divided into four groups: T1 (animals dosed orally, directly into the mouth), T2 (treated orally, mixed in the water of a herd), T3 (treated orally, mixed in the water of one animal), and T4 (not treated). Individual faecal samples were taken before treatment, and 15 days thereafter. Mean percentages of reduction of egg shedding were calculated for Nematadirus spp., other trichostrongyles, total trichostrongylids, Trichuris spp. and total nematodes. No statistically significant differences were detected between the treatment groups and the control group or among the animals in the three treatment groups
- PublicationEmbargoOutput of gastrointestinal nematode eggs in the feces of captive gazelles (Gazella dama mhorr, Gazella cuvieri and Gazella dorcas neglecta) in a semiarid region of southeastern Spain(American Association of Zoo Veterinarians, 2006-09-01) Ortiz Sánchez, Juana; Ruiz de Ybáñez Carnero, María del Rocío; Abaigar, Teresa; Goyena, Marina; Garijo Toledo, María Magdalena; Espeso, Gerardo; Cano, Mar; Sanidad AnimalFeces from 62 captive African gazelles, including Mhorr gazelles (Gazella dama mhorr), Cuvier’s gazelles (Gazella cuvieri), and Dorcas gazelles (Gazella dorcas neglecta), were examined over the course of a year to quantitate nematode egg excretion patterns. Strongyloides sp. eggs appeared only in G. dama during the rainy season. Trichostrongylidae egg excretion showed a marked seasonal variation, with very low levels during the dry and hot period, a finding that is probably attributable to hypobiosis of the predominant species (Camelostrongylus mentulatus). Eggs of the Nematodirus sp., predominantly Nematodirus spathiger, were excreted throughout the year. No seasonal pattern was observed in Trichuris sp. egg excretion.
- PublicationEmbargoPeriparturient increase in faecal egg counts in a captive population of mohor gazelle (Gazella dama mhorr)(Wiley British Veterinary Association, 2004-01-10) Ruiz de Ybáñez Carnero, María del Rocío; Goyena, Marina; Abaigar, Teresa; Garijo, M. Magdalena; Martínez Carrasco-Pleite, Carlos; Espeso, Gerardo; Cano, Mar; Ortiz, Juana; Sanidad AnimalThe objective of this study was to assess whether there was a periparturient rise in the faecal egg output of a population of North African gazelles (Gazeia dama mhorr) kept in captivity in Almeria, southern Spain. In one experiment faeces were collected from 47 female gazelles on three days in winter, in November and December 1995 and January 1996; in a second experiment faecal samples were collected from nine pregnant gazelles at weekly intervals from July 1996 to June 1997. The mean trichostrongylid faecal egg counts were significantly higher (P<0-05) in the periparturient gazelles than in the pregnant and nonpregnant animals only when the births took place in winter. Other factors, including the gazelle's age, its level of inbreeding, the number of previous births, and its trichostrongylid egg output at the beginning of the study did not affect whether it showed a periparturient rise. The parasites responsible for the rise were different in the two experiments.
- PublicationEmbargoRecords of Eimeria spp. and their patterns of excretion in captive North African Gazelles(Helminthological Society of Washington, 2001) Ruiz de Ybáñez Carnero, María del Rocío; Ortiz, Juana; Garijo Toledo, María Magdalena; Espeso, Gerardo; Abaigar, Teresa; Cano, Mar; Sanidad AnimalThe species of Eimeria occurring in 3 species of captive gazelles (Gazella dama mhorr, Gazella cuvieri, and Gazella dorcas neglecta) were identified. This is the first report of Eimeria pallida, Eimeria elegans, and Eimeria gazella in these hosts and also the first report of E. elegans and E. gazella in Spain. Feces were collected from each of 9 young gazelles for periods of 3-7 mo to determine their oocyst shedding profile. Most oocysts appeared at 20-25 d, peaked, and decreased to undetectable levels between 40 and 115 d. Eimeria gazella delayed its excretion, which continued at low levels throughout the observation stage. No clinical signs of infection were observed in the gazelles during the study.
- PublicationOpen AccessUse of pooled faecal samples in assessing nematode egg shedding in captive gazelles (Gazella species)(Wiley, 2000-08-12) Ruiz de Ybáñez Carnero, María del Rocío; Ortiz, Juana; Abaigar, Teresa; Espeso, Gerardo; Cano, Mar; Sanidad Animal