Effect of Hibiscus sabdraffira and tea extract on cellular immunity in lab animals

In this study , the effect of aqueous extract of Hibiscus sabdariffa calyces ,black and green tea leaves were studied in lab animals . Cellular immunity which represented by the phagocytes as in the reduction of NBT dye and skin DHT test. Hibiscus extract was showed higher significant NBT reduction in P ≥.05 compare with tea extract and control where s there three plants were stimulated cellular immunity in skin DTH test demonstrated by signs of reaction such as redness ,thickness ,necrotic ,indurations and erythma after 24-72 hr.