*3.1.2.1 Dissemination of identified carbapenemases among enterobacteria*

The carbapenemases circulating in the city of Maroua are of several types and in different proportions. The KPC type which represents 36.84% of identified carbapenemases is produced at 5.26% by each of the species *Arizona*, *E. asburiae, P. mirabilis, P. vulgaris, S. ficaria* and at 10.53% by the species *E. gergoviae*. Type OXA-48 or OXA 181 represents 10.53% of all these carbapenemases. The species *P. mirabilis* and *S. odorifera 1* each contributes 5.26% of the production. Eight types of carbapenemases produced by enterobacteria do not fit into the reference algorithm. These are non-determined types (NDPs) 1, 2, 3, 4, 5, 6, 7 and 8. NDE 1 represents 10.53% of all carbapenemases and is produced by *E. gergoviae* and *S. odorifera 1*, which each contributes 5.26%. TND 2, which accounts for 10.53%, is produced by the microorganism *P. mirabilis*. TND 3 produced by a single microorganism, *S. odorifera* 1, is present at 5.26%. TND 4, produced by the microorganism *P. mirabilis* only, occupies


**Table 3.**

*Frequency of Enterobacteriaceae species identified in the biological samples taken.*


#### **Table 4.**

*Dissemination of circulating carbapenemase types between the identified enterobacteria species.*

5.26%. The TND 5, 6, 7, 8 each represents 5.26% produced respectively by the microorganisms *S. odorifera* 1, *C. braakii*, and *E. gergoviae* for the last two types (**Table 4**).
