تلخیص
Street vended fresh fruit juices are generally available under unhygienic conditions and cost-effective nutritional food
source in Karachi. Heavy metal contamination of food products including fresh fruit juices is of high concern
worldwide. Alarming levels of heavy metals in fresh fruit juices is likely to cause deleterious health effects in public
due to extensive consumption among tropical countries. For this purpose, 80 samples (60 street vended juice samples
of Sugarcane, Mango, Banana, Orange, Apple and Watermelon, 10 water samples and 10 milk samples used in the
preparation of theses juices ) were collected from Saddar town, Karachi to determine heavy metals (Arsenic, Cadmium,
Chromium, Iron, Lead, Nickel and Zinc). The mean level of heavy metals in Sugarcane juices were in the order of Pb >
Ni > Fe > Zn >Cr > As > Cd, while in Mango and Banana juices were Ni > Fe > Pb > Zn > Cr > As > Cd and Pb >Ni
>Fe >Zn > Cr > As >Cd. Similarly, the order of mean levels of heavy metals in Orange, apple and watermelon juices
were Ni > Pb > Fe > Zn > Cr > As >Cd, Ni > Fe > Zn > Pb >As > Cr >Cd and Pb > Ni > Cr > As > Fe > Zn > Cd.
Furthermore, mean concentration of heavy metals in water and milk samples were in the order of Ni > Pb > Fe > Zn >
Cr > Cd >As and Pb > Ni > Fe >Zn > Cr > As > Cd. The present study also focused on microbiological investigation
for the detection of Total Coliforms Count (TCC) and Total Fecal Coliforms Count (TFC) by MPN method in street
vended fresh fruit juices. All fruit juices, water and milk samples from all stations have shown contamination with
total coliform count and fecal coliforms. Water and milk along with their not sufficiently clean utensils were the major
sources of heavy metals and pathogenic microorganisms which may cause detrimental health problems in the
consumers..