In the case of the common drone-fly, Eristalis tenax, the individual, from a sedentary maggot living in filth, without any relations of sex, and with only unimportant organs for the ingestion of its foul nutriment, changes to a creature of extreme alertness, with magnificent powers of flight, living on the products of the flowers it frequents, and endowed with highly complex sexual structures.
General atrophy or emaciation is brought about by the tissues being entirely or partially deprived of nutriment, as in starvation, or in malignant, tubercular, and other diseases of the alimentary system which interfere with the proper ingestion, digestion or absorption of food material.
V.) are undoubtedly the result of excessive ingestion of food material containing more neutral fats than the normal tissues can oxidize, or these, as a result of defective removal owing to enfeebled oxidative capacities on the part of the tissues, become stored up in the tissues.
Prolonged ingestion of arsenic may cause pigmentary changes in the skin.
In other cases the infection of the first host is brought about by the ingestion FIG.
In the Taenia solium it takes 3 to 3z months from the time of ingestion of the embryo to the passage of the matured segments, but in the Taenia saginata the time is only about 60 days.
The blood-sucking habit is common to both sexes, and the abdomen, being capable of great expansion, is adapted for the periodical ingestion of an abundant food-supply.
- (a) On the ground that animals are affected by diseases which are communicable, and are actually communicated, to man by the ingestion of their flesh, e.g.
Ingestion and dissolution of the Trypanosomes by phagocytes has frequently been observed; and it is probable also that the haematopoietic organs secrete some substance which exerts a harmful action on the parasites, and causes them to undergo involution and assume weird-looking " amoeboid " and " plasmodial " forms.
A disease of cattle in Nova Scotia, known as the Pictou cattle disease, long treated as contagious, has now been demonstrated by the veterinary officers of the department to be due to the ingestion of a weed, the ragwort, Senecio Jacobea.
The symptoms of strychnine poisoning usually appear within twenty minutes of the ingestion of a poisonous dose, starting with an uneasy sensation, stiffness at the back of the neck, twitching of the muscles and a feeling of impending suffocation.
Heusinger has shown that white sheep and pigs are injured by the ingestion (A) N b X N ?--,r N(A)+N of certain plants, while the pigmented individuals may eat them without harm.
In these animals, in certain inflammatory skin eruptions, caused by the ingestion of harmful plants, the albinotic areas are alone affected.
The other plan is to use an exclusively meat diet, combined with the ingestion of a large quantity of hot water, so as to cause free elimination.
In three of them at least - the whey cure, the grape cure and the meat cure-a diminution in one or other of the solid constituents of food is associated with the ingestion of an unusually large quantity of water.
The increased ingestion of bacteria in active immunity would seem to depend upon the presence of immune opsonins in the serum.
The ingestion of bacteria by the cells, and the subsequent intracellular digestion.