Muy buenas! No parece que haya reacción obvia alrededor de los huevos, puede que sea contaminación y tengas algún trematodo escondido en uno de los bloques de los casos que procesaron con ese.

It looks like Paragonimus (westermani?) eggs. Can you measure the precise size of the eggs? Left upper side there is a granuloma, indicating a strong reaction.

I can't agree less with Christian G Meyer. Those eggs looks like that of Paragonimus.

Paragonimus eggs

The microscopic morphology of haematoxylin and eosin stained section of rat lung gives a resemblance to the eggs of Paragonimus, a helminth of public health significance.

Thank you very much for your help!