Fungus, PAS, Candida sp., Artificial

Controls Slides Histopathology Fungus, PAS, Candida

Validation Stain: PAS/Light Green


Organisms artificially introduced into a rat organ (e.g., lung) through a non-infective process.  (Not in human tissue)

(+) Rat Lung / (-) Lung
Adhesive or Charged Slides: 
Superfrost +

Product Options:

Part # 4233A10/Set $49.00
Part # 4233B98/Set $346.00


Tissue:  Positive staining rat lung and negative staining human lung.

Fixation: Formalin 10%, Phosphate Buffered (Part 1090).

Section/Glass: Paraffin sections cut at 4 microns on Superfrost™ Plus slides.

Quality Control Stain:  PAS/Light Green quality control stained slide(s) included.

Reactivity: Guaranteed product specific reactivity for one year from date of receipt. Revalidate after one year to verify continued reactivity. 

Storage: 15-30°C in a light deprived and humidity controlled environment.

Before using unstained control slides, review the enclosed stained slide(s) to ensure that this tissue source is acceptable for testing needs.



The enclosed positive control slides are intended to verify histological techniques and reagent reactivity. The intended use is for the qualitative purpose of determining positive or negative results, and not intended for any quantitative purpose. Candida albicans purchased from Remel Microbiology Products is used to produce the positive rat lung control tissue and the negative control sections are produced from human surgical or autopsy tissues under carefully controlled conditions. Quality control measures are used to deliver control slides that are as consistent as possible.  



With Fungus, PAS/Light Green Stain Kit:    Part 9122A Individual Stain Solution
Solution A: Periodic Acid 0.5%, Aqueous 250 ml Part 13308
Solution B: Schiff Reagent, McManus 250 ml Part 1371
Solution C: Light Green SF Yellowish Stain 0.1%, Aqueous 250 ml Part 12203



Newcomer Supply Fungus, PAS, Candida sp., Artificial Control Slides are for the positive histochemical staining of Candida sp. in tissue sections.



  1. Heat dry sections in oven according to your laboratory protocol.
  2. Deparaffinize sections thoroughly in three changes of xylene, 3 minutes each.  Hydrate through two changes each of 100% and 95% ethyl alcohols, 10 dips each.  Wash well with distilled water.
    1. See Procedure Notes #1 and #2.
  3. Place in Solution A: Periodic Acid 0.5%, Aqueous for 5 minutes.
  4. Wash in three changes of tap water; rinse in distilled water.
  5. Drain slides of excess water and stain in Solution B: Schiff Reagent, McManus for 20 minutes. 
  6. Wash gently in lukewarm tap water for 10 minutes to allow pink color to develop.
  7. Counterstain in Solution C:  Light Green SF Yellowish Stain 0.1%, Aqueous for 5 seconds.
    1. See Procedure Note #3.
  8. Dehydrate in two changes each of 95% and 100% ethyl alcohol. Clear in three changes of xylene, 10 dips each; coverslip with compatible mounting medium.



Candida sp. Red to magenta
Background Pale green
Negative lung Negative for fungus



  1. Drain staining rack/slides after each step to prevent solution carry over.
  2. Do not allow sections to dry out at any point during staining procedure.
  3. Increase or decrease staining time in Light Green SF Yellowish Stain 0.1%, Aqueous for preference of counterstain intensity.
  4. If using a xylene substitute, closely follow the manufacturer’s recommendations for deparaffinization and clearing steps.



  1. Bancroft, John D., and Marilyn Gamble. Theory and Practice of Histological Techniques. 6th ed. Oxford: Churchill Livingstone Elsevier, 2008. 321-323.
  2. Sheehan, Dezna C., and Barbara B. Hrapchak. Theory and Practice of Histotechnology. 2nd ed. St. Louis: Mosby, 1980. 245.
  3. Modifications developed by Newcomer Supply Laboratory.