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by
L. Sawadogo |
Total Records (
3 ) for
L. Sawadogo |
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O.C. Hien
,
B. Diarra
,
R. Dabire
,
J. Wangrawa
and
L. Sawadogo
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This study was designed to identify the external parasites
and to evaluate their effects on mortality, growth and reproduction of poultry
in the traditional rearing system in the sub-humid zone of Burkina Faso. Identification
of external parasites was done on 500 of each species of chicken, guinea fowls
and turkeys. For the evaluation of the effects of external parasites on the
productivity of poultry, 324 chicks that were 6 weeks of age were randomly divided
into 12 groups of 27 chicks each. Four of the groups was assigned at random
to receive a treatment against external parasites (ET), 4 other groups were
similarly assigned to receive a treatment against external parasites and another
treatment against internal parasites (EIT). The 4 remaining groups were not
treated against parasites (NT). Two mice species Liperus gallinae and
Monopon gallinae have been found on both chicken and turkeys while Goniodes
gigas was the only mice species parasiting chicken. The lice Echidnophaga
gallinacea and the tick Argas persicus have been found to parasite
chicken. Results of productivity trial showed that mortality due to effects
of external parasites amounted to 13.9% of non treated poultry. Live weight
of male birds increased from the base line of 850 g of the non-treated birds
by 9.8% (950±164.3 g) due to treatment against external parasites and
by 44.5% (1250±133.1g) due to treatments against both external and internal
parasites. Live weight of female birds increased similarly from 952.5±238.7
g by only 3.8% (980.5±36.2 g) due to treatment against external parasites
and then by 13.5% (1081.6±160.2 g) due to treatment against both external
and internal parasites. Likewise, age at first egg decreased from 28 weeks to
25 weeks with treatment against external parasites and further to 24 weeks with
both treatments. Egg weight also increased from 47 to 48.0g due to treatment
against external parasites and further to 48.5g due to both treatments. External
parasites increase mortality rate and reduce growth rate of chicken. |
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B. Bayala
,
P.B. Telefo
,
I.H.N. Bassole
,
H.H. Tamboura
,
R.G. Belemtougri
,
L. Sawadogo
,
B. Malpaux
and
J.L. Dacheux
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Testis histology and sperm parameters were used to evaluate the antispermatogenic effect of Leptadenia hastata aqueous extract in male Wistar rats. 100, 200, 400 and 800 mg kg-1 of Leptadenia hastata aqueous extracts were orally administered during 60 consecutive days. L. hastata aqueous extract did not have significant (p>0.05) effect on body, testis and epididymis weights. Testes histology of rats treated with the plant extract showed the decrease of Leydig cells number and the spermatogenesis was been influenced with high doses of L. hastata aqueous extracts. Some sperm parameters as path velocity, progressive velocity, straightness, linearity and motility of spermatozoa were been significantly (p<0.05) decreased. The treated rats with the different amount of L. hastata aqueous extracts showed a significant (p<0.01) reduction in the number of sperm in the testis and the cauda epididymis. Even if its not significant, the extract showed a decrease of testes, epididymis weights and a rarity of Leydig cells. These results confirm the antiandrogenic effect of L. hastata and the claims of breeders that the consumption of the leaves of L. Hastata reduced the fertility of their animals. |
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M. Boungou
,
G.B. Kabre
,
A. Marques
and
L. Sawadogo
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The study of the gill fishes of 176 Oreochromis niloticus
(L.) was undertaken in the dam of Loumbila (Burkina Faso), in order to
obtain the first information on the dynamics of population of the Monogeneans
parasites in a population of wild hosts. These data are essential in the
search for means to avoid the enormous losses that often occur in intensive
pisciculture. This analysis revealed the presence of five species of Monogeneans
(Cichlidogyrus tilapiae, Cichlidogyrus halli, Cichlidogyrus
thurstonae, Cichlidogyrus rognoni and Scutogyrus longicornis).
On the levels of the recorded infestations, these species taken individually
probably do not control the population of Oreochromis niloticus.
In the dam of Loumbila, the fluctuations of parasitic abundances are neither
seasonal nor cyclic. The size either does not have an influence on parasitism.
However, the sex effect was noted with C. halli, the females thus
were more infested than the males. O. niloticus is parasitized
all the year, because the recruitment of these organisms, although relatively
weak, is continuous; this logically results in their accumulation in this
fish. |
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