The haematology of the Angora goat with special reference to the habitual aborter. I. The pregnant doe

The differential leucocyte count, total eosinophil count, blood sugar, plasma sodium, potassium, calcium, inorganic phosphorus and haemoglobin concentrations of the blood of 18 normal and 11 habitual aborter Angora does were studied during pregnancy. The results were compared with the existing information on the goat. It was found that the percentage lymphocytes of the normal does increased during gestation with a concomitant decrease in neutrophils, eosinophils and plasma potassium and an increase of plasma sodium and blood glucose values. These variations in the normal constituents of the blood and plasma were attributed to the influence of the hormones of the adrenal cortex, which exhibited maximal function in the parturient female. A decline of adrenal function after 13 weeks gestation appeared to precede parturient elevation. It thus appears that the pre-partum decline of adrenal function occurs earlier in gestation of the goat than the drop of cortisol levels demonstrated 14 days pre-partum in sheep. Significant differences in the haematology between aborter does and the controls were observed. The percentage neutrophils was found to be higher and the lymphocytes and eosinophils lower than the controls at all stages of gestation. Similarly the values for blood glucose and plasma sodium were higher and plasma potassium lower than the corresponding values of the normal doe. These differences support the concept that adrenal hyperfunction may be intimately associated with gestational failure in goats, and these procedures can be useful in detecting animals liable to abort.The journals have been scanned in colour with a HP 5590 scanner; 600 dpi. Adobe Acrobat v.11 was used to OCR the text and also for the merging and conversion to the final presentation PDF-format

Hormone levels in peripheral plasma of the Afrikaner cow II. Progesterone and total unconjugated oestrogen levels during late gestation and parturition

No Abstrac

Hormone levels in peripheral plasma of the Afrikaner cow I. Progesterone and luteinizing hormone levels during the oestrous cycle

No Abstrac

"Grootlamsiekte", a specific syndrome of prolonged gestation in sheep caused by a shrub Salsola tuberculata (Fenzl ex Moq) Schinz var. tomentosa C. A. Smith ex Aellen

A specific syndrome of prolonged gestation in sheep in South West Africa was studied and eventually reproduced by artificial feeding of the shrub, S. tuberculata var. tomentosa. lt was determined that the main period of insult occurred during the last 50 days of pregnancy. The trend of both progesterone and cortisol levels resembled those of normal ewes except for a considerable delay during this 50-day period. Apart from the abnormal length of gestation and concomitant features such as retarded udder development, no signs of toxicosis were manifested by the ewes. The most significant features in the postmature lambs were progressive hypophysial, adrenal and thymic atrophy; hypertrophy of the female genitalia, polyfollicularity of the ovaries and Leydig cell hypoplasia; long haircoat, erupted incisors and pigmentation especially of the kidneys and lymph nodes, but no abnormal a natomical features were found. ln rats, rations containing the shrub prolonged both gestation and the dioestrous phase of the oestrous cycle. The active ingredient of the plant is not an oestrogenic or a nti-oestrogenic substance. It was successfully extracted with alcoholic compounds.The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Veterinary Research Institute, Onderstepoor

Post-partum oestrus synchronization in beef cattle using high dosages of progesterone

No Abstrac

Time of ovulation in the Karakul ewe following synchronization of oestrus

No Abstrac

The peripheral plasma progesterone concentration and luteal progesterone content in the post-partum ewe

No Abstrac

Die progesteroonkonsentrasie in die bloedplasma van S.A. Vleismerino-ooie

No Abstrac

Geslagsrypheid en reproduksievermoë van Karakoelooie in twee voedingsisteme

No Abstrac