عنوان المقالة:التغيرات الكيميائية الحيوية المرتبطة بالكيتوزية في الأبقار ذات الغرض المزدوج في التربية (تارينتيز مع الابقار المصرية البلدية) وتأثيرها على الخصوبة لاحقا Ketosis-Related Biochemical Changes in Crossbred (Tarentaise X Egyptian Baladi) Dual-Purpose Cows and its Effect on the Subsequent Fertility
أحمد سعد أحمد حسانين - محمد حسين رمضان - علاء الدين زين العابدين محمود - علاء السيد بليسي زيدان - أحمد عزت أحمد - محمد سعداوي راوي - جو كيتاهارا - تاكيشي أوساوا
المؤلفون بالإنجليزي
Ahmed Hassaneen, Mohammed Ramadan, Alaa-Eldin Zain-Elabedeen, Alaa Zaidan, Ahmed Ezzat, Mohamed Sadawy Rawy, Go Kitahara, Takeshi Osawa
الملخص الانجليزي
[Introduction] Crossbreeding of native cows with high producing foreign pure breeds such as
Tarentaise cows is of an increasing importance in subtropical countries as these crossbreds are
more adaptive to the different climatic conditions. Egyptian Baladi cows had been originally
used for draft agricultural work and meat production, however, nowadays they are mainly kept
for both milk and beef production. Because of higher productivity, the incidence of some
metabolic disorders such as ketosis in crossbred cows is higher than that in native breeds. Up
to our knowledge, no reports are available about biochemical changes due to ketosis in
crossbred (Tarentaise X Egyptian Baladi) cows. The aims of this study were to evaluate such
changes in order to develop better understanding and likely to predict the possible occurrence
of ketosis in dual-purpose crossbred cows. [Materials and Methods] In this study, out of 120
examined (Tarentaise X Egyptian Baladi) crossbred cows a total of 50 were clinically classified
into two groups; ketosis (n=30), and healthy control (n=20) groups based on the ketone bodies
level in urine at one week before the expected calving day using Medi-Test Comb-10
Glucose/Ketone kits, where the level of ketone bodies was distinguished as; none (–), traces
(+/–), positive (+) and strongly positive (++/+++). In addition, ketosis group cows developed
signs of reduced appetite, decrease in milk production, and acetone odor on breath. Automatic
milking was used for the used cows after short-term calf removal after 72 hours. The
concentrations of glucose, cholesterol, triglycerides, NEFA, calcium, phosphorus, sodium,
potassium, albumin, total proteins, and urea were detected in blood at 1-week prepartum,
partum “calving day”, 1-week and 2-weeks postpartum. To evaluate the cows’ fertility, both
the days to first estrus (mean ±SEM) and the number of services per conception (mean ±SEM)
were evaluated in both groups. [Results] The ketosis group showed significantly low glucose,
low cholesterol, high NEFA, and low calcium levels in all time points in comparison to control
group (P<0.05). Plasma glucose, serum triglycerides, and calcium levels significantly
decreased in partum and postpartum time-points compared to those in prepartum time point in
both groups. There were either no or slight changes in the levels of other investigated
parameters throughout the sampling period. However, the mean serum NEFA level (mEq/L)
showed significant increase (P<0.05) among all time points with a value of more than 5 times
in 2-weeks postpartum in comparison to 1-week prepartum only in ketosis cows with values of
3.22 ±0.13 and 0.63 ±0.03, respectively. Moreover, ketosis negatively affected the reproductive
performance where ketosis group showed significant increase (P<0.05) in the days to first
estrus (mean ±SEM) from 37.95± 1.16 to 79.00± 2.20, and significant increase (P<0.05) in the
number of services per conception (mean ±SEM) from 1.2 ±0.09 to 1.8 ±0.09. In conclusion,
ketosis negatively affected the reproductive performance of dual-purpose crossbred cows.
Moreover, both low plasma glucose level and high serum NEFA levels were the most
prominent biochemical changes in crossbred cows with ketosis. It is recommended that
crossbred cows should receive adequate amount of high quality forage during transition period
to avoid ketosis and prevent the subsequent fertility disorders.
تاريخ النشر
14/09/2020
الناشر
163rd Meeting of the Japanese Society of Veterinary Sciences
أحمد سعد أحمد حسانين | Ahmed Saad Ahmed Hassaneen | 5501