scholarly journals Effect of gastrointestinal nematodes on ovulation rate of merino Booroola heterozygote ewes (FecBFec+)

2006 ◽  
Vol 55 (6) ◽  
pp. 545-550
Author(s):  
Daniel Fernández-Abella ◽  
Zully Hernández ◽  
Nelson Villegas
Keyword(s):  
Gastrointestinal Nematodes ◽  
Ovulation Rate

Silage for flushing ewes

1983 ◽  
pp. 196-202
Author(s):  
J.M. Hayman ◽  
J.M. Munro
Keyword(s):  
Ovulation Rate

Keyword: wilted silage, flushing, ovulation rate

Effect of Jatropha curcas Latex on L3 Haemonchus contortus Larval Motility

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
Noorzaid Muhamad ◽  
Syahirah Sazeli ◽  
Resni Mona ◽  
Jannathul Firdous
Keyword(s):  
Larvicidal Activity ◽  
Jatropha Curcas ◽  
Haemonchus Contortus ◽  
Anthelmintic Resistance ◽  
Small Ruminants ◽  
Gastrointestinal Nematodes ◽  
Dose Dependent ◽  
Plants Extract

The anthelmintic resistance has limited the control of gastrointestinal nematodes of small ruminants and thus has awakened interest in the study of plants extract as a source of anthelmintics. These experiments were carried out to evaluate the in vitro efficacy of Jatrophacurcas latex extract against Haemonchuscontortus larval motility. To evaluate the larvicidal activity, H.contortus L3 were incubated with the extracts with varying concentration of 5 mg/mL, 10 mg/mL, 15 mg/mL and 20 mg/mL at 27°C for 48, 72 and 96 hrs. The results were subjected to the Kruskal-Wallis test (P less than 0.05). The extracts showed dose-dependent larvicidal effects. These results suggest that J.curcas can be used to control gastrointestinal nematodes of small ruminants.

Relationship between ovulation rate and embryonic characteristics in gilts at 35 d of pregnancy

2017 ◽  
Vol 95 (7) ◽  
pp. 3160
Author(s):  
C. L. A. Da Silva ◽  
M. L. W. J. Broekhuijse ◽  
B. F. A. Laurenssen ◽  
H. A. Mulder ◽  
E.F. Knol ◽  
...  
Keyword(s):  
Ovulation Rate

Efficacy of anthelmintic Eprimek against gastrointestinal nematodes in sheep

2020 ◽  
Vol 14 (4) ◽  
pp. 99-103
Author(s):  
V. I. Kolesnikov
Keyword(s):  
Live Weight ◽  
Gastrointestinal Nematodes ◽  
Production Environment ◽  
Control Groups ◽  
The North ◽  
Helminth Eggs ◽  
Nematode Eggs ◽  
Flotation Technique ◽  
And Control ◽  
Experimental Group

The purpose of the research is studying the efficacy of Eprimek (Eprinomectin) against gastrointestinal nematodes in sheep.Materials and methods. A commercial experiment to study the antiparasitic efficacy of Eprimek was carried out in June 2020 on 300 lambs of the North Caucasian breed in a private flock of Filimonovskaya Village, Izobilnensky District, the Stavropol Territory, which were divided into two groups. The experimental group of lambs (290 animals) was injected Eprimek subcutaneously at the earset at a dose of 1 ml/50 kg of live weight (10 mg of Eprinomectin in 1 ml), and 10 lambs were not treated; they were used as control. We collected feces from the lambs of the experimental and control groups before administration of the drugs and after 15 and 30 days. Fecal samples were examined by the flotation technique with a saturated solution of ammonium nitrate with counting nematode eggs in 1 g of feces. The results were processed statistically.Results and discussion. Eprimek showed a decrease in the number of excreted helminth eggs from 225.1±28.2 to 4.1±2.3 in production environment at a dose of 1 ml/50 kg of live weight, according to coprological studies on the 15th day after treatment in the experimental group of lambs. The efficacy was 98.2%, and 70% of the animals were free from the infection. The intensity of infection of the control lambs by gastrointestinal nematodes was 131–151 eggs per 1 g of feces at 100% prevalence.

EFFECT OF AROMATASE INIBITOR IN OVULATION INDUCTION IN FETILE WOMEN WITH POLYCYSTIC OVARY SYNDROME

2014 ◽  
pp. 86-93
Author(s):  
Minh Tam Le
Keyword(s):  
Polycystic Ovary Syndrome ◽  
Ovulation Induction ◽  
Polycystic Ovary ◽  
Endometrial Thickness ◽  
Statistical Significance ◽  
Ovulation Rate ◽  
Normal Body Mass Index ◽  
Ovary Syndrome ◽  
Group I ◽  
First Choice

Backgrounds: Polycystic Ovary Syndrome (PCOS) is one of the most common causes of female infertility due to ovulation disorders. Clomiphene citrate (CC) is a first choice to restore ovulation but it has some side effects by estrogen receptor down-regulation. Aromatase inhibitor (AI) is a newer class of drugs which increases the production of endogenous FSH to stimulate ovulation. Subjects and methods: randomized control trial to compare 64 cases of infertile women with PCOS examined at the Hue University Hospital, alternately used AI (group I) or CC (group II) for ovulation induction from day 2 cycle. Follow-up follicle growth, endometrium and ovulation via ultrasound. Evaluation were done on 10th day cycle, day of hCG trigger and after administration of hCG. Results: Total of 64 PCOS cases distributed into 2 groups using alternatively AI and CC had similar characteristics with average age of 28.8 ± 4.6, the majority were primary infertility (84.4%), infertility duration was 2.6 ± 2.4 years, 85.9% had oligomenorrhrea or amenorrhea, normal body mass index accounts for 60.9% and 21.9% was lean. Evaluation of both groups on day 10 revealed no differences in the dominant follicle and endometrial thickness. Number of days until the follicle mature appears to be shorter in AI group (15.1 ± 2.9) compared to the CC group (16.5 ± 2.8) with statistical significance. The number of mature follicles in 2 groups were not different at a rate of 81.3% (AI) and 84.4% (CC) but a higher proportion of single mature follicle in the AI ​​group (71.9%) compared with the CC group (65.7%) and There is no case with 3-4 mature follicles in the AI group. The rate of thin endometrium (<8 mm) in the AI group (25%) was lower than the CC group (53.1%) with statistically significance and higher ovulation rate (68.8%) compared with the CC group (56.3%) but have not found statistically significant. Conclusion: Two drugs AI and CC potentially induce follicle development and ovulation similarly, but AI has the potential to be more effective than CC on factors such as the shorter stimulation duration, increasing rate of single follicle, limiting multiple pregnancies, improve endometrial thickness and higher ovulation rate. More researches are needed with a larger sample size to clarify the statistical significance of differences.

A genome-wide survey reveals a deletion polymorphism associated with resistance to gastrointestinal nematodes in Angus cattle

2014 ◽  
Vol 14 (2) ◽  
pp. 333-339 ◽  
Author(s):  
Lingyang Xu ◽  
Yali Hou ◽  
Derek M. Bickhart ◽  
Jiuzhou Song ◽  
Curtis P. Van Tassell ◽  
...  
Keyword(s):  
Gastrointestinal Nematodes ◽  
Deletion Polymorphism ◽  
Angus Cattle ◽  
Genome Wide ◽  
A Genome ◽  
Genome Wide Survey

scholarly journals 140 Effect of hCG on the last day of the 5-d CIDR-Synch and/or on day 5 of the estrous cycle on luteal dynamics in recipient Holstein heifers

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 112-113
Author(s):  
Marcelo Siqueira El Azzi ◽  
Everardo Anta Galvan ◽  
Teresita Valdes Arciniega ◽  
Iago Leão ◽  
Rodrigo Sala ◽  
...  
Keyword(s):  
Estrous Cycle ◽  
Ovulation Rate

Abstract The objective was to determine the effect of hCG (3,300 IU) administered on days 0 and/or 5 of the estrous cycle on total luteal area (TLA) and circulating concentrations of progesterone (P4) in recipient heifers. All heifers (n = 232; BCS = 3.3 ± 0.2) were synchronized with a 5d CIDR-Synch protocol (d-8: used CIDR inserted; d-3: CIDR removed and PGF2α treatment; d0: 100µg GnRH or hCG). Heifers were randomly assigned to four treatments: control, hCGd0, hCGd5, and hCGd0&5. Controls were treated with GnRH on d0, while hCGd0 received hCG on d0. hCGd5 heifers were treated with GnRH on d0 and hCG on d5, while hCGd0&5 received hCG on d0 and 5. Ovaries were scanned by ultrasound on d0, 5, and 12. Blood was collected on d0, 5, 7, and 12. Synchronization rate (94%) did not differ (P = 0.94) by treatment. Treatment differences were only tested in synchronized heifers (n = 218). Proportion of heifers with 1 or 2+ CL on d5 did not differ (P = 0.10) for hCG d0 treatments (hCGd0 + hCGd0&5) vs. GnRH d0 treatments (controls + hCGd5). However, heifers treated with hCG on d0 had greater (P &lt; 0.01) TLA and P4 on d5 vs. treatments with GnRH on d0 (311 ± 13 vs. 257 ± 9 mm2; and 2.39 ± 0.15 vs. 1.90 ± 0.09 ng/mL). Ovulation rate for d5 hCG did not differ (P = 0.63) for hCGd5 vs. hCGd0&5 (93 vs. 84%). Controls had the lowest serum P4 on d7 and 12. In contrast, hCGd0&5 had the highest serum P4 on d7 (Table 1). Serum P4 on d7 did not differ for hCGd0 vs. hCGd5. On d12, serum P4 and TLA were not different for hCGd5 vs. hCGd0&5. These data indicate that hCG can be used on d0 to induce an increase in serum P4 on d5 compared to GnRH. However, only heifers treated with hCG on d5 achieved mean serum P4 &gt; 8ng/mL.

In vitro anthelmintic activity of Pimienta dioica and Origanum vulgare essential oils on gastrointestinal nematodes from sheep and cattle

2021 ◽  
Author(s):  
Gerardo Jiménez-Penago ◽  
Roberto González-Garduño ◽  
Luciano Martínez-Bolaños ◽  
Ema Maldonado-Siman ◽  
Alvar A. Cruz-Tamayo ◽  
...  
Keyword(s):  
Essential Oils ◽  
Anthelmintic Activity ◽  
Gastrointestinal Nematodes ◽  
Origanum Vulgare

A note on attainment of puberty of september-born early-maturing ewe lambs in relation to level of nutrition

1991 ◽  
Vol 53 (3) ◽  
pp. 407-409 ◽  
Author(s):  
F. Forcada ◽  
J. A. Abecia ◽  
L. Zarazaga
Keyword(s):  
Sexual Activity ◽  
Breeding Season ◽  
Ovulation Rate ◽  
Corpora Lutea ◽  
Plasma Progesterone ◽  
Ewe Lambs ◽  
Early Maturing ◽  
Age At Puberty

The attainment of puberty in September-born early-maturing ewe lambs was studied at Zaragoza (latitude 41° 40' N). Thirty twin Salz females were allocated to two groups receiving two nutrition levels after 3 months of age: high (500 g/day lucerne hay and 500 g/day concentrate) (H) and low (500 g/ day lucerne hay) (L). Oestrus was detected daily by aproned rams. Corpora lutea were counted after oestrus and plasma progesterone levels monitored each week.In the first breeding season (January to February) the percentage of females showing sexual activity (silent emulation or oestrus and ovulation) was higher in the H compared with the L group (67 and 20%; P < 0/05). Nonpubertal oestrus before the main breeding season was detected in 67% of animals. In the main breeding season and for H and L groups respectively, percentage of females showing silent ovulation before puberty was 67 and 33% and mean age at puberty extended to 319 (s.e. 4-8) and 314 (s.e. 3·7) days. Ovulation rate at puberty was 1·73 (s.e. 0·13) and 1·33 (s.e. 0·15) respectively (P < 0·05).

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