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Ova & Parasite (O&P) Exams

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Ova and Parasite (O&P) Examinations

Introduction | Macroscopic | Microscopic |

Microscopic Examination - Ova and Parasite Examination

Introduction | Direct Wet Smear | Concentration | Permanent Stained Smear

Concentration

Introduction | Formulas | Quality Control | Procedures | Results and Reporting | Procedure Notes | Procedure Limitations | Procedure Review | Tips and Pitfalls

Formulas

5 or 10% formalin

• Formaldehyde (USP) 100 ml (for 10%) or 50 ml (for 5%)
• Saline solution

0.85% NaCl 900 ml (for 10%) or 950 ml (for 5%)

Note: Formaldehyde is normally purchased as a 37 to 40% HCHO solution; however, for dilution it should be considered to be 100%.

Dilute 100 ml of formaldehyde with 900 ml of 0.85% NaCl solution. (Distilled water may be used instead of saline solution.)