Effects of three nematode anthelmintic treatment regimes on flock performance of sheep and goats under extensive management in semi-arid Kenya

Analysis of survival curves in seasonally mated pastoral goat herds in northern Kenya using logistic regression techniques

“…This is in contrast with the findings of other studies conducted under comparable environmental conditions, which identified parity of dam to be a significant source of variation in kid mortality (Sacker & Trail, 1966;Wilson et al, 1985;Traoré & Wilson, 1988). Gatongi et al (1997) tested the effectiveness of two anthelmintic treatments applied either prior to or just after the onset of the rainy seasons on reducing kid survival until 9 months of age. Based on the mortality rates reported by these authors, one can calculate that the anthelmintic treatments reduced the relative risk of death of first vs. later parity kids from as much as 12?0 in the control group, to 2?3 and 5?2 in the two treatment groups.…”

“…Based on the mortality rates reported by these authors, one can calculate that the anthelmintic treatments reduced the relative risk of death of first vs. later parity kids from as much as 12?0 in the control group, to 2?3 and 5?2 in the two treatment groups. In the present study, a deworming treatment was regularly applied to all animals prior to the rains, and, in light of the evidence provided by Gatongi et al (1997), this may have contributed to the observed lack of association between parity of dam and kid survival.…”

“…High postnatal mortality incidence rates have been associated with, among other factors, sex of kid, multiple births, low birth weights and suboptimal feeding levels during gestation, parity and age of dam, low milk production, and season of birth (Adu et al, 1979;Wilson et al, 1985;Osuagwuh, 1991;Gebrelul et al, 1994;Rattner et al, 1994;Gatongi et al, 1997). Unfortunately, all of these factors tend to be confounded to some extent, and they can therefore not be assessed simultaneously by entering them into the same statistical model.…”

Anthelmintic Treatment of Goats on an Arid Range and its Effect on Milk Production in Late Lactation

“…who d o c u m e n t e d a n e g a t i v e i m p a c t of gastrointestinal parasite burdens on liveweight gains of indigenous goats of Botswana. Also, Gantongi et al (1997) in a semi-arid region of Kenya found t h a t anthelmintic t r e a t m e n t regimes of goats under extensive management improved body weight. In the above mentioned studies goats were not milked, thus, the higher nutrient demands for milk synthesis in goats of the present study and the scarcity of forage on the range seems to explain the lack of effect of anthelmintic treatment on body weight.…”

Influence of gastrointestinal trichostrongylidosis on ram fertility

“…These reductions are seemingly easily observed by the breeder but are very difficult to demonstrate in the field with a scientific approach (Ambrosi 1995). However, these interferences for female sheep or for lambs were validated (Ambrosi 1995, Gatongi et al 1997, Thompson et al 2000, Fthenakis et al 2001, information on rams was lacking; in fact in males the pathogenic effects are mainly referred to a direct action on the reproductive system. Studies focused on the effects of antiparasitic drugs that cause a transitory depression of fertility Correspondence to: G. Gaglio, e-mail: ggaglio@unime.it (Kayum et al 1992, Kumar et al 1992, Raisinghani 1992 suggest avoiding the treatment of camels during the mating season (Al-Quarawi et al 2004).…”