Position in cell

Infected larvae

Larvae infected with AFB are only ever found stretched out along the lower wall of the cell (prepupal stage). Infected larvae are never found in the c-shape of younger larvae, since the disease-causing bacteria do not penetrate the gut wall until just before the larvae pupate.

Infected prepupae


Prepupae infected with AFB are always found in the characteristic prepupal position, stretched out along the lower wall of the cell, with the head closest to the cell entrance (Fig. 20).

Diseased prepupae and pupae are always stretched along the lower wall of its cell.

Figure 20: A very early stage AFB infected
prepupae slumped on the lower cell wall

 

 

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