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The present work was planned to study the prevalence and the pathological lesions of Trichinella spiralis larva of slaughtered pigs in Cairo Governorate by using Trichinoscopic examination in slaughterhouse and confirmatory diagnosis by histopathological examination. For this purpose 184 muscle samples of pigs were collected from Al-Basatin Slaughterhouse, Cairo Governorate. The overall prevalence of Trichinella spiralis infection was 1.08% of examined pig's carcasses.

The Aqueous extracts of red beet, China rose, henna and acid carmine stains were used to stain the adult worms of F. gigantca. The stained flukes showed varying degrees of pigmentation with well-defined external and internal structure. Oral and ventral sucker, muscular pharynx, oesophagus, intestinal ceca and cirrus sac took rose to light cherry color in aqueous extract of china rose, orange to brown color in aqueous extract of sugar beet, beige to pale brown color in aqu eous extract of henna while they took deep red color in carmine stain with best quality achieved by china rose aqueous extract. The ovary, testes and longitudinal excretory canal/pore took rose to cherry color in aqueous extract of China rose, pale brown color in aqueous extracts of both sugar beet and henna while they acquired red to pink color in acid carmine stain. Aqueous extracts of sugar beet exhibited little better quality in revealing characteristics of vitelline ducts and vitelline glands compared to the aqueous extract of China rose, henna and carmine stain. Uterus stained brown in both sugar beet aqueous extracts and carmine stain while it took yellow color when stained with China rose and henna. Eggs inside uterus took light yellow color in all tested aqueous extracts. Ootype/mehli’s gland and yolk reservoir of F. gigantica took brown color in aqueous extracts of red beet, China rose and henna, red to pink color in carmine stain. Spines covering the cuticle appeared rose color in aqueous extract of china rose, pale brown color in aqueous extract of sugar beet extract and henna, and pale red color in carmine stain. Key words: Fasciola gigantica, Natural herbal dye

The Aqueous extracts of red beet, China rose, henna and acid carmine stains were used to stain the adult worms of F. gigantca. The stained flukes showed varying degrees of pigmentation with well-defined external and internal structure. Oral and ventral sucker, muscular pharynx, oesophagus, intestinal ceca and cirrus sac took rose to light cherry color in aqueous extract of china rose, orange to brown color in aqueous extract of sugar beet, beige to pale brown color in aqu eous extract of henna while they took deep red color in carmine stain with best quality achieved by china rose aqueous extract. The ovary, testes and longitudinal excretory canal/pore took rose to cherry color in aqueous extract of China rose, pale brown color in aqueous extracts of both sugar beet and henna while they acquired red to pink color in acid carmine stain. Aqueous extracts of sugar beet exhibited little better quality in revealing characteristics of vitelline ducts and vitelline glands compared to the aqueous extract of China rose, henna and carmine stain. Uterus stained brown in both sugar beet aqueous extracts and carmine stain while it took yellow color when stained with China rose and henna. Eggs inside uterus took light yellow color in all tested aqueous extracts. Ootype/mehli’s gland and yolk reservoir of F. gigantica took brown color in aqueous extracts of red beet, China rose and henna, red to pink color in carmine stain. Spines covering the cuticle appeared rose color in aqueous extract of china rose, pale brown color in aqueous extract of sugar beet extract and henna, and pale red color in carmine stain. Key words: Fasciola gigantica, Natural herbal dye