Proximate Composition and Levels of Essential/Toxic Metals in Chicken Meat Raised around Industrial Area in Ethiopia
No Thumbnail Available
Date
2019-04
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
The ge nera l trend of poul try prod uction and consumpti on has been steadily in creasi ng globally in
rece nt because of its benefi t to consumers' hea lth from chicken meat and eggs The o bjecti ve o f
thi s study was to determine proximate composition and levels of some se lected essenti al meta ls
(Zn, Cu, Mn, Cr, Co, & Ni) and tox ic heavy meta ls (As, Pb, Hg, and Cd,) of chi ckens rai sed
a round Akak i, Bishofitu and Modjo industry areas, Ethiop ia. Purposefu lly 5 hens 11'om loca l
markets of each ind ustry area which were cu lt ivated in a trad itional way were purchased and
used for the study purpose. Parts of chest and thi gh were used for prox imate analys is and pa rts of
li ver, th igh and chest were used for essential and tox ic meta ls analysis pu rposes. Prox imate
analys is was done us ing AOAC (2000) us ing o ffi c ial method s. Wet d igestion technique to
extract heavy metals from sam ple was used and metals analys is was carried out us ing inducti vely
coup led plasma opti ca l emi ssion spectroscopy. Res ults of prox imate composition of chest and
th igh samrles coll ected from indu stry a reas a re summarized as, Prote in 22.49, 2 1.97; Moisture
72.23, 70.50 Fat 1. 14, 1.24, ash 1. 11 , 1.13 res pecti ve ly. These resul ts were found be ing
comparable with li teratures reviewed. The results of mean concen trations of metals from studied
parts of industry areas of li ver, th igh and chest samples (mg/Kg) ranged ; Zn 24.04- 134.53 , Cu
2.90-9.24 Mn 1.40-8.64 , Cr 4.44 - 4.75, Co ND - 0.02, Ni 3.23 - 4.48 As 0. 11 - 0.33, Cd 0.0 I -
0.98, Pb 0.02 - 0. 16, Hg 0.05 - 0.09. The results of the mean concentrations o f those essenti al and
tox ic meta ls were compared aga in st permiss ible limi ts of each trace metal set by intern at ional
stand ard s; Cu from a ll studi ed sample parts; Zn from liver of Akaki , Cd from liver samples of
Akaki and Bisho fitu. Mean va lues of Mn, Cr and Ni from a ll sample parts were found to be
higher than th eir respect ive pe rmi ss ible limits. Whereas all oth er trace metals other than Co,
whose permiss ible limit is not mentioned in World health organi zation standard were found to
have mean concen trat ions below than their permi ss ible limits. Though essenti a l meta ls a re
important for human life in va rious ways excessive and prolonged exposures of those trace
metals may im pose health ri sks to the community. Respiratory problems, increased risk of lung
cance r, ne uro logica l defic itS, developmental defic its in c hild ren and in creased blood pressure are
health ri sks due to Ni expos ures. Neurological di sorde rs similar to Parki nson 's di sease may
result due to excessive Mn exposure. Simil a rly in hib ition lead ing to Wilson's diseases after long
time Cu ex posure arId, skin rashes, stomach ul cer, kid l'i'ey, li ver damages, lung cancer andultim ate death due to pro longed higher Cr ex posures. The result also indi cated th at chi ckens of
li ver samples from Akaki and Bishofitu industry areas were found with much hi gher Cd
concentrations (I.08±O.36mg/kg, and 1.45±O.68mglkg respect ively) re necting th e environment
is polluted with Cd. Higher leve l Cd exposures might cau se hea lth impacts such as hypertension,
eleva ted blood pressure. renal dysfun ction, acute and chronic pu lmonary dysfun ct ions to the
community.
Tak ing the hea lth ri sks due to envi ronmental pollutions around indu stry areas into account.
chicken meat that contai ns good nutrit ional values li ke protein s, fat, and essenti al minerals such
as zinc, can al so be used to alleviate poverty for the country.
Key words: Chicken meal, proximale cOll1posilion and Essenlia/IToxic melal.I·, Environmenlai
pollulion.
Description
Keywords
Chicken meal, proximale cmposilion and Essenlia/IToxic melals, Environmenlai pollulion