Ova can be found in sputum or faeces. Humans can be infected with several species (P. westermani, P. heterotremus, P. kellicotti, P. uterobilateralis and others). WARNING: acid-fast staining for tuberculosis destroys the eggs and precludes diagnosis!
| - It is difficult for an inexperienced microscopist to distinguish eggs among different Paragonimus species and Diphyllobothrium latum
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