الفهرس 
Effect of Offspring Sex on Colostrogenesis during the Late Pregnant Period of Buffalo in North Africa
AbstractOnly 14 pages are availabe for public view
 |  | from | 166 |  |  |
| | | from | 166 | | |
Abstract
ABSTRACT
The experimental work was carried out at Mehlet Moussa Experimental Station,
Animal Production Research Institute, Agriculture Research Center, Ministry of
Agriculture to investigate the effect of offspring sex and vaccination of pregnant buffalo
dams using (ScourGuard-4K) on colostrum yield, some colostrum components and
some blood parameters for dams and their calves. Sixteen pregnant buffalo dams were
divided into four groups (four animals in each group). The first group was unvaccinated
dams pregnant with a male fetus. The second group was unvaccinated dams pregnant
with a female fetus. The third group was vaccinated dams pregnant with a male fetus.
The fourth group was vaccinated dams pregnant with a female fetus. The dam blood
samples were collected before calving, at birth, and after 24 hours of birth. Blood
samples from newborn calves were collected just at birth and then at 6, 12, 24 hours
after birth. colostrum samples were collected at 6 different times, including just after
calving, and after 6, 12, 24, 48, and 72 hours of birth. Calves were weighed directly
after birth and then at 15-day intervals until weaning. Calves were diagnosed with
diarrhea, as well as the duration of the injury. Results of the current study showed that
colostrum of dams that gave birth to male fetus had a richer content of IgG and IGF-1
levels and a higher percentage of total solids, solids-not-fat, total protein, fat, and
lactose. Additionally, vaccination improved the same colostrum components except for
IGF-1, which was not positively influenced by the vaccination. The results of the
analysis of the dam’s blood serum proved that the dam who gave birth to a male calf
had higher concentrations of IGF-1, IgG, and T3 hormone than in the case of dams who
gave birth to females, while the sex of the newborn had no significant effect on T4
hormone in the dam’s blood. The vaccination of dams showed a positive significant
effect on the concentration of IgG but decrease the concentration of T3 and had
nonsignificant positive effect on the concentration of T4 in the dam’s blood, and there
was no significant effect of vaccination the dams on the concentration of IGF-1. The
results of blood analysis of newborn calves showed that the concentration of IgG, IGF-1
and T4 in calf blood serum increased significantly in the case of the male calves than
the female calves, while the T3 hormone was not affected by the sex of the newborn
calves. Vaccination has a positive significant effect on IGF1 and IgG concentration in
calf blood serum, and a negative effect on T3 and T4. Vaccinated male calves achieved
the highest growth rate, followed by unvaccinated males, then vaccinated females. The
growth rate of unvaccinated females was the lowest. No cases of diarrhea were recorded
for vaccinated males, and the highest percentage of diarrhea was in unvaccinated female
calves.