This lecture is important to a large group of listeners because it is concerned with the potential risks of eating crayfish muscles which contaminated with heavy metals

Title : This lecture is important to a large group of listeners because it is concerned with the potential risks of eating crayfish muscles which contaminated with heavy metals

Abstract:

Potential health risks of heavy metal exposure have been reported in the past few decades. In particular, recent studies have demonstrated that metals have cancer and non- cancer risks to human health beings. Cancer and non-cancer risks after consumption of metals via water and crayfish muscles was reported in few studies.

Heavy metals can be divided into essential metals and non-essential metals. Essential metals, including Fe, Cu, Co, Mn, and Zn, are necessary for biological life, but they become poisonous at higher concentrations. Other metals (non- essential metals), such as Pb, Cd, Hg, and As, are not necessary and can be harmful even in low concentrations

Lead (Pb) is reported to be an accumulative metabolic poison, which affects the nervous, cardiovascular, renal, hematopoietic, and reproductive systems in human. It can also cause mental retardation and hyperactivity in children. Cadmium can cause acute kidney damage, bone damage, spontaneous abortion, and cancer through absorption of the intestine, stomach, lung, and skin.

Arsenic (As), which is more toxic in its inorganic salts than in its organic salts, was associated with carcinogen by the International Agency for Research on Cancer (IARC). Inhalation of inorganic As caused lung cancer in smelter workers. Inorganic form of As might be established as low birth weight, fetal loss, cardiovascular disease, cognitive deficit, and skin impairment.

Elemental mercury (Hg) was harmful for the central nervous system, while inorganic Hg com-pounds primarily affected the kidney. Particularly, methyl-mercury (MeHg) was a potent neurotoxin. Even low dose Hg was reported to decrease performance in motor function and memory not only in children but also in adults.

Therefore, it is very important to evaluate the potential risks to human health caused by food intake contaminated by heavy metals in Procambarus clarkii.

Human health risk assessment of HM exposure through fish muscle consumption was examined in both people who eat a standard amount of fish (normal people) and those who eat it often (habitual people).

Biography:

Mahmoud Mahrous Mohammed Abbas  is Lecturer of Marine Biology at Zoology Depart., Facu. of Science Al-Azhar Uni., Cairo, Egypt.  Teaching various courses in Faculty of Science Al-Azhar University.  He is a member in the Marine biology Lab and in the Animal House at the Faculty of Science of A-Azhar University since 2012. He received a B.S. of marine biology and chemistry from Al-Azhar University in 2009, and an M.S. of environmental pollution from the Al-Azhar University of Cairo at Egypt in 2015. He received his Ph.D. of fish Biotechnology from the University of Al-Azhar in 2020. His research interest includes fish biotechnology, aquatic toxicology, marine environment and nanotechnology. Much of his work has been on improving the fish preservatives,  metal toxicity and human risk health assessment. Abbas also organized workshops on biostatics and aquaculture for academics and professionals. He has given numerous invited talks and tutorials, and is a consultant to some companies involved in fish processing and technology. Abbas website includes Science