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. 2020 Sep;20(3):1090–1108. doi: 10.4314/ahs.v20i3.11

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© 2020 Aruhomukama D.

Licensee African Health Sciences. This is an Open Access article distributed under the terms of the Creative commons Attribution License (https://creativecommons.org/licenses/BY/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4 — The circular three-dimensional inoculation (indicated by the arrow) intersected the inhibition zone margins to produce major distortions (i.e., positive three-dimensional test results) that indicated enzymatic inactivation of piperacillin (A), cefamandole (D), cefoperazone (E), CTX (F), and ceftriaxone (G). Distortions did not occur (i.e., negative three-dimensional test results) in tests with aztreonam (B), imipenem (C), CAZ (H), or cefoxitin (I). The outer circle is the plastic rim on the bottom of the petri dish.