E. coli-derived recombinant porcine interferon gamma (rPoIFN-T ) exerts an antiviral activity against Coronavirus Transmissible Gastroenteritis infection of porcine kidney cells.In addition, rPoIFN T is able to modulate immune responses in the pig.Thus, rPoIFN-T at the dosis of 1 wg/ml increases spontaneous cytotoxic reactivities (or NK activity) of peripheral blood lymphocytes from 2-month old or less than 1-week old piglets.rPoIFN-T is also active on blood monocyte cultures by increasing their Interleukine 1 secretory potential.These preliminary results illustrate the antiviral and immunomodulatory effects of porcine recombinant IFN-T .Sanitary state of pig herds from Brittany. 2.

increased by 60 p. 100 compared to the control value).The noticeable differences between the effects of WB and RB diets on Ca-P metabolism might be attributed to the 16-times higher dietary phytase activity of RB.However, other variables such as trial length or percentage of bran incorporation might explain these differences.Our results clearly demonstrate that high dietary phytase levels or rich phytase by-products lead to a better P utilization.A reduction of requirements for inorganic P might save money since this P is still one of the most expensive feed ingredient in pig feeding.Comparative efficiency of four iron dextran injectable solutions

In the growing-finishing pig trial, feeds including raw rapeseed were eaten more slowly than the control feed.Feed conversion ratio of diets containing 5 and 10 % raw rapeseed was 5.3 and 9.1 % higher than that of the control diet.The 10 % extruded rapeseed diet led to the same results as the control diet.Fat content of carcasses was similar whatever the diet.By contrast, liver weight and consequently dressing percentage were affected by the presence of raw rapeseed in the diet.Feeding value of barley-based fat enriched diets for weaned piglets

Feeding value of grain maize silage with or without cobs in ad lihitum feeding of weaned piglets was studied after two maize harvests (1982 and 1983).Silages used were characterized by dry matter contents ranging from 595 to 670 g/kg.The cellulose Weende contents of silages with cobs (G.M.C.) ranged between 57 and 78 g/kg DM.Silage lots were incorporated in replacement of dry grain maize into maize- soyabean diets on the basis of the dry matter content.A total of 576 and 744 piglets respectively were used in the two trials.They were weaned at the mean age of 27 days.After an adaptation period of 11 days they were fed

Three daily feed restriction levels during gestation were compared : 7.15, 7.95 and 8.75 Meat D.E., i.e. 2.3 kg feed per day (diet I), 2.5 kg feed per day (diet 11) and 2.7 kg feed per day (diet III), the daily crude protein supply being similar.During lactation, all the sows were fed the same 15 p. 100 protein diet.Results recorded until 7 reproductive

mean live weight of 32 kg were kept in individual pens and received only cereal based diets (97 p. 100 oats).They were subjected to a 10-days faeces collection period.Three types of oats were tested : two regular oats (black and white) and one batch of naked oats containing 15.0, 11.8 and 2.9 p. 100 crude fibre respectively, on a dry matter basis.

a normal commercial rapeseed oil-meal : dry matter : 90 ; total crude protein : 39