[The name of a Dutch island at the mouth of the Schelde.] Used in comb., as Walcheren ague, fever.
1810. Dawson (title), The Walcheren Fever.
1848. Thackeray, Van. Fair, xxvii. The hottest suns of India never heated his temper; and the Walcheren ague never shook it.
1889. Mayne’s Med. Voc. (ed. 6), 473. Walcheren Fever.… An endemic remittent fever.
