• Gastrointestinal symptoms: ongoing diarrhoea, constipation, bloating or excess gas.
• Altered bowel habits: fluctuating stool consistency or frequency.
• Abdominal discomfort: cramping or unexplained digestive discomfort.
• Irritable bowel syndrome: persistent IBS-type symptoms with unclear triggers.
• Nutrient concerns: malnutrition, unintended weight loss or poor nutrient status.
• Fatigue and low energy: ongoing tiredness without a clear explanation.
• Immune-related symptoms: frequent infections or reduced immune resilience.
• Skin and allergy symptoms: new or worsening allergic reactions or skin lesions.
• Musculoskeletal symptoms: joint or muscle aches without clear cause.
• Exposure history: travel, childcare settings, animal contact or food and water exposure.

Overview

The Parasitology x 2 (Px2) test uses a combination of PCR and microscopy to assess a wide range of protozoa, helminths and other stool markers from a two-day stool collection. In addition to parasitic organisms, the analysis may include observations such as yeast, red and white blood cells, fibres and other microscopic findings relevant to gastrointestinal assessment.

This test may be clinically useful when gastrointestinal symptoms persist or fluctuate and overlap with systemic features such as fatigue, skin changes or nutrient concerns. Using a two-day collection can help capture organisms or findings that may not be consistently present in a single sample, offering a broader snapshot of stool-related findings.

Practitioners typically consider results alongside symptom history, travel and exposure risk, diet, medication use and other laboratory investigations. Interpreting findings within this wider context helps support informed discussions with clients about digestive health patterns.

Practical

Specimen requirements: STOOL

QUANTITY: Each vial must be filled until the indicated fill line, and must not be filled to the top.

STORAGE: 

Black capped vials: REFRIGERATE (DO NOT freeze)

The test kit contains 3 black-capped parasitology vials, and practitioner can instruct patient to collect on 1, 2 or 3 days. The unused vials can be discarded. Yellow vial should be collected on the last day of sample collection.

Age requirements:

Applicable to all ages. For infants, collect from the middle of the stool, not touching the diaper as this will contaminate the sample. The stool needs to be free of urine.