Browsing by Subject "Gazelles"

Now showing 1 - 4 of 4
  • Thumbnail Image
    Publication
    Open Access
    Are Anthelminthic Treatments of Captive Ruminants Necessary?
    (MDPI, 2021-10-18) Lahat, Liron; Ortiz Sánchez, Juana; Tizzani, Paolo; Ibáñez, Belén; Valera, Francisco; Moreno, Eulalia; Espeso, Gerardo; Ruiz de Ybáñez Carnero, María del Rocío; Sanidad Animal
    Anthelmintics are frequently administered to animals to limit fecal egg elimination, so that wild animals in captive breeding programs are treated to maintain a proper health condition. This is effective from a health management perspective, but on the other hand, it could prevent captive animals from developing an effective immunity against parasites that they might encounter when reintroduced into their original geographic areas. The aim of this study was to describe the dynamics of parasite infections in captive Cuvier’s gazelles (Gazella cuvieri) not treated with anthelmintics for two years and to evaluate the factors related to their fecal egg shedding. Fifteen one-year-old males were enclosed together and captured monthly to collect feces directly from the rectum. Fecal egg counts were performed, and eggs were classified as strongylid-like, Nematodirus sp., or Trichuris sp. Fecal egg shedding for the three groups of parasites did not vary significantly over the duration of the study. Only precipitation affected the egg-shedding pattern of all parasites, while inbreeding was positively associated with the number of strongylid-like parasites. These findings suggest an equilibrium between hosts and parasites in absence of treatment during the study. The anthelmintic treatment as a systematic prophylaxis method in captive animals should be avoided and replaced by systematic coprological and clinical vigilance, as well as targeted treatment in the case of a significant rise of fecal egg counts
  • Thumbnail Image
    Publication
    Restricted
    Effect of mebendazole and ivermectin on the shedding of nematode eggs by three species of gazelles (Gazella dama mhorr, G. cuvieri, and G. dorcas)
    ( American Association of Zoo Veterinarians, 1995-07-07) Abaigar, Teresa; Ortiz, Juana; Cano, Mar; Martínez-Carrasco Pleite, Carlos; Albaladejo, Antonio; Alonso de Vega, Francisco-Domingo; Sanidad Animal; Facultades de la UMU::Facultad de Veterinaria
    Mebendazole and ivermectin were studied for the control of gastrointestinal helminthiasis in three species of captive gazelles: Gazella dama mhorr, G. cuvieri, and G. dorcas. Ivermectin was given s.c. in a single 0.2-mg/kg live-weight dose and mebendazole was given in three dosages based on species: G. dorcas, 14 mg/kg; G. cuvieri, 6 mg/kg; and G. dama, 3 mg/kg orally twice daily for 3 consecutive days. Each drug was tested in 13 individuals of each species; 13 additional individuals served as untreated controls. Helminths detected by fecal examination and culture were species of Trichuris, Ostertagia, Cooperia, Trichostrongylus, Nematodirus, and Strongyloides. The prevalence among the total gazelle population was: Trichuris, 55%; Nematodirus, 26%; and other nematodes, 84%. After treatment with mebendazole, the nematode egg counts and the number of animals shedding eggs decreased moderately. After ivermectin treatments, there were marked decreases in the amount of eggs being shed and the number of animals shedding eggs of these nematodes.
  • Thumbnail Image
    Publication
    Open Access
    Oral 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 Animal
    Idiosyncracies 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
  • Thumbnail Image
    Publication
    Restricted
    Output 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 Animal
    Feces 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.