The controversy, so vigorously carried on for ten years, regarding the relation between the bovine and the human types of the tubercle bacillus has now largely subsided, leaving most bacteriologists of one opinion; namely, that it is possible to distinguish sharply the one type from the other, and to recognize easily by suitable methods the bovine type when it is recovered from the human body. In the course of the world-wide investigation conducted to establish these relationships, several cases have been described in which there was a double infection—the human type of bacillus being responsible for the lesion in one part of the body, the bovine type for the lesion in another. These cases have recently been summarized by Weber1 as follows:
1. German Commission Case H-33, both types in mesenteric lymph-node, human type only in bronchial lymph-node.
2. German Commission Case H-38, bovine type in mesenteric lymph-node, human
LEWIS PA. DOUBLE INFECTION WITH THE HUMAN AND BOVINE TYPES OF BACILLUS TUBERCULOSIS. JAMA. 1913;60(3):202–203. doi:10.1001/jama.1913.04340030032015
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