is Trichomonas fetus which is spread by the bull and results in death of the fetus. The fetus often remains dead in the uterus bathed in pus. Diagnosis is by rectal palpation or rectal ultrasonography. There is no serological test. Treatment is with prostaglandin injections. Prevention is by using artificial insemination (AI).
Udder oedema
This occurs in high-producing dairy cows and, particularly, in heifers immediately before calving. Inducing calving with a prostaglandin injection may be warranted to prevent damage to the udder.
Udder rot
The cause of this condition is not clearly understood, but it is associated with cows with enlarged mammary glands. Inflammation and infection occur between the udder and the hind leg. This irritates the cow which then starts to lick the area regardless of any creams or sprays applied. This licking becomes an obsession and can even result in the licking off of a teat if it becomes involved. Parenteral antibiotics and dexamethazone may be helpful, but the latter should be used with care as these animals are often pregnant.
Diseases of the Locomotory System
Viral diseases
Bovine ephemeral fever (BEF)
This is caused by a rhabdovirus and transmitted by Culicoides spp. and Anopheles spp. It occurs in Africa (where it is called ‘three day sickness’), Asia and Australia. Animals will be pyrexic and recumbent with a serous nasal, lacrimal and salivary discharge. There may be dyspnoea. Mortality is low and animals normally recover with good nursing. There is no treatment. Infection can be confirmed by paired serum samples.
Конец ознакомительного фрагмента.
Текст предоставлен ООО «ЛитРес».
Прочитайте эту книгу целиком, купив полную легальную версию на ЛитРес.
Безопасно оплатить книгу можно банковской картой Visa, MasterCard, Maestro, со счета мобильного телефона, с платежного терминала, в салоне МТС или Связной, через PayPal, WebMoney, Яндекс.Деньги, QIWI Кошелек, бонусными картами или другим удобным Вам способом.
