Oral and Poster Abstracts

2006 was observed a small decreasing of the incidence till 166 positive
cases, and in 2007 a new increasing till 275 positive cases. The
prevalence compared to the serological exams made each year revealed
in 2003 405 positive samples from the 2019 tested, in 2004 from the
830 samples 193 were positive, in 2005 from the 1545 samples 390
were positive, in 2006 297 positive samples from 1140,and in 2007,
from 1582 serological exams 475 were positive. If in 2003 antibodies
against Maedi Visna virus were detected in sheeps from 25 Sanitar
Veterinary Circumscriptions, their number increased each year, in
2006, 2007 antibodies being detected in all 38 circumscriptions of the
Covasna County.
771 Effect of Intracervical Infusion of Prostaglandin F 2a and
Prostaglandin E2 on Dilation of Cervix in Ewes with
Ringwomb
M. Eslampour 1 , P. Tajik 1 , S. Bokaie 2 , H. Moaddab 1 , A. Moghiseh 1 ,
B. Khoramian 1 , S. Rafia 1 , E. Banihasan 1
1 University of Tehran, Dept. of Clinical Sciences, Tehran, Iran
2 University of Tehran, Department of Food Hygiene, Tehran, Iran
To evaluate the clinical efficacy of administration of prostaglandin E2
(PGE 2) and prostaglandin F 2a (PGF 2a) intracervically by comparing
these with digital manipulation on dilation of cervices in ewes with
ringwomb .Pregnant ewes which cervices failed to dilate during
parturition assigned randomly to three treatment groups: 1) 7 ewes
manipulated their cervices digitally for ten minutes and if this effort
had not responded, after ten minutes another effort initiated, 2) 6 ewes
received 1 mg infusion of PGF 2a (Lutalyse; Pfizer Animal Health)
dissolved in 2 ml of 30% gelatine (Sigma-Aldrich Co.) intracervically
and, 3) 6 ewes received 0.5 mg infusion of PGE 2 (Prepidil; Pfizer
Health) intracervically . For infusion of PG 2a, a speculum introduced
into the vagina so that the external os cervix could be seen in the light
of the speculum lamp. The tip sterile pipette was inserted about 2 cm
into the cervix and the gels deposited in to the lumen of cervices. For
prevention of leakage of PG 2a gels required restraining ewes in to the
lateral recumbency for 15 minutes after infused. The response to the
treatment would be assigned positive if proceeding on parturition and
delivery of live lambs was occurred one hour after administration of
treatment. All of the ewes that did not response to the treatment,
monitoring for two hours later and if there was not any proceeding on
parturition they would be culled consequently. Results showed that
ewes were treated with PGE 2a interacervically had greatest response
compared with treatment with digital manipulation and intracervical
infusion of PGF 2a (5/6s vs. 3/7 and 3/6 respectively). However,
response to treatment did not differ between the groups significantly
(p>0.05). Culling rates from three groups revealed that ewes in digital
manipulation group had greater culling rates compared with PGF 2a and
PGE 2a groups (4/7 vs. 2/7 and 1/7 respectively, p>0.05). It can be
concluded that using PGE 2 in the ewes with undilated cervices after
initiated of abdominal straining can be an effective treatment and
preventive approach for culling of pregnant ewes.
772 Influence of Reduced Dietary Crude Protein Level on
Performance of Dairy Cows under Heat Stress
A. Asadi, G. Ghorbani
Isfahan University of Technology, Department of Animal Science,
Isfahan, Iran
Two groups of high yielding early lactation cows were allocated to
either high (17% DM, 106 cows) or low (15.6% DM, 102 cows) crude
protein diet. Mean DIM, milk yield and parity for cows in high and low
protein treatments were; 59.5±21 and 65.3±26d; 38 and 37.3 kg/d; 3.1
and 2.9, respectively. Mean daily ambient temperature was 37.3 ˚C
throughout the trial. Cows were in the trial for six weeks allowing two
weeks for adaptation and the remaining 28 days for data collection. Dry
matter intake and milk production were recorded daily and diets and
milk were sampled weekly. MIXED procedure was used for statistical
analysis including time of sampling in the repeated statement and
assuming cow as random effect. Reducing dietary protein resulted in
lower dry matter intake (22.4 vs. 24.9 kg/d, P