What is a spore syringe? A beginner's guide for microscopy
Open a MycoWorld parcel and you will find a capped 10 ml syringe with a strain name and a LOT number on it. This is what is inside, why it is made that way, and how you get from the syringe to a slide worth looking at.
01What is actually in the syringe
Sterile water and spores. A spore print of the strain is taken in a flow hood, a measured amount is suspended in sterile water, and the suspension is drawn into a luer-lock syringe and capped. A good syringe looks faintly cloudy when you hold it to the light and shows a fine haze of particles when tilted. Those particles are the spores, usually purple-brown in mass for cubensis, near-black for Panaeolus, and much paler for albino lines.
Nothing else should be in there. Nutrient, colour or a strong smell all mean contamination, which is why the water and the hood matter more than the label.
02From syringe to slide
- Shake the syringe gently for ten seconds so the spores are evenly suspended.
- Remove the cap and, without touching the tip to anything, place one small drop on the centre of a clean slide.
- Lower a coverslip at an angle so it settles without bubbles.
- Start at 100x to find the field, then move to 400x. At 1000x with oil you will resolve the wall and the germ pore.
- Recap the syringe straight away and return it to the fridge.
One drop is plenty. A 10 ml syringe holds enough for dozens of slides, which is why a single specimen can anchor a whole reference series.
One drop is plenty. A 10 ml syringe holds enough for dozens of slides.
03What you will see
Psilocybe cubensis spores are subellipsoid, roughly 11 to 17 micrometres long, thick-walled, with a visible germ pore at one end. In a dense drop they cluster; in a thin one they spread and you can measure them against an eyepiece graticule. Albino and leucistic lines produce spores that are translucent under the same light, which is a striking comparison on adjacent slides. Panaeolus cyanescens spores are darker and lemon-shaped. Our spore morphology guide goes deeper.
04Syringe, print or swab?
A syringe is the easiest to use and the most consistent. A spore print is the raw deposit on foil or paper and is the better format for colour work. A swab is a print taken onto a sterile cotton tip, convenient for species that print poorly. MycoWorld supplies all three; the comparison explains when each makes sense.
05How long it keeps
Refrigerated at 2 to 8 degrees, capped and away from light, a syringe keeps its spores intact for many months and often longer. Warmth and light are what degrade a specimen. Do not freeze it. Full storage notes are in How to store spore syringes.
Specimens for this story: DreadMaw (Gamma Decay iso), Lucid Gates, Iceberg Clam 456 and MFH Ape, all prepared under sterile protocol and LOT-logged in the UK.
Questions people ask
How many slides can I make from one spore syringe?
Dozens. One small drop per slide is enough, so a 10 ml syringe will support a long reference series.
Why does my syringe look almost clear?
Albino and leucistic lines produce pale, translucent spores that barely tint the water. Under the microscope they are there, and the contrast with a dark-spored line on the next slide is exactly what makes them interesting.
Does a spore syringe need to be kept cold?
Keep it in the fridge, capped and out of light. That is all it needs.