Figure 16: The mango is a stone fruit, with fibrous mesocarp fruit flesh. The fibrous material coalesces into a grungy background (A). What may be mistaken for infectious organisms are the rounded, thick-walled droplets that resemble fungal spores such as Candida or infectious parasites (B). The orange’s color is lost in preparation, and the vesicles are ruptured, leaving behind thick, fibrous endocarp on MGG stain (C). The staining is more opaque under MGG, and a slightly more see-through under PAP stain (D).
A: Mango, PAP stain, 60x magnification
B: Mango, MGG stain, 60x magnification
C: Orange, MGG stain, 20x magnification
D: Orange, PAP stain, 20x magnification