Na, (from catarrhus, because this fever is accompanied with, or proceeds from, a catarrh). The catarrhal fever, or continual quotidian of the ancients. It begins in the evening, with a shivering and a coldness of the skin and extreme parts, costiveness, frequent desire of making water, but the urine is small in quantity; weakness of the head, universal languor, a capricious and irregular appetite, thirst, difficulty of swallowing, stimulus on the larynx, a heat in the nostrils and fauces, attended with sneezing, and a weight in the breast. Towards night, heat, and a quicker, fuller pulse; cough, with a defluxion of rheum, a heat in the fauces, unquiet sleep, sweating in the morning, and at length a total loss of appetite. In the forenoon there is generally a remission, and it thus appears of the quotidian type.

The cause is a fever, with inflammation on the membrane of the nostrils, throat, and bronchiae, occasioning the secretion of a sharp, acrid serum, which irritates every part of this membrane, and sometimes the oesophagus, stomach, and intestines; a cough, hoarseness, spitting of a viscid matter, sneezing, a defluxion on the lungs, nausea, and colic followed by a salutary flux, are often the consequences.

Women, children, and weakly men, are its chief subjects. It is most frequent in spring and autumn, or in very variable seasons. After a few days, a catarrh comes on; and as soon as its discharge appears at the nose, the symptoms of the fever go off': sometimes, indeed, a copious perspiration relieves, and at others a large discharge, thrown up from the lungs; or, perhaps, a diarrhoea proves the natural means of cure.

If we do not wait for these, we must relieve the fever by the more common means of emetics and cathartics, and thus supersede the deposition on the lungs. In fact, from the neglect only of these more general remedies it becomes a catarrhal fever. If these are neglected, the remedies are the same as in catarrh. See Catarrhus.