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OJVRTM
Online Journal of Veterinary Research©
Volume 18(3): 247-252, 2014. Redacted 2017.
Effect of dietary Zataria
Multiflora on histology of cecal tonsils in broilers
Shomali T DVM, PhDa ,
Hamedi S DVM,
PhDb,[1], Mohseni M MSc
a Division of Pharmacology
and Toxicology, Department of Basic Sciences, School of Veterinary Medicine,
Shiraz University bDepartment of Basic
Sciences, Faculty of Veterinary Medicine, Karaj Branch, Islamic Azad
University, Karaj, an.
cDepartment of
Basic Sciences, Faculty of Specialized Veterinary Sciences, Science &
Research Branch, Islamic Azad University, Tehran, Iran.
ABSTRACT
Shomali T, Hamedi
S, Mohseni M., Effect of dietary Zataria
Multiflora on histology of cecal tonsils in broilers,
Onl J Vet Res., 18(3): 247-252, 2014. Effects
of dietary Zataria
multiflora on the histology of cecal
tonsil tissue in broiler chickens is
described. Five groups of ten 1d
old chicks each were fed diets with 0.5, 1, 1.5 and 2% Z. multiflora days
or a basal control diet for 45 days. On day 46, birds were slaughtered and cecal tonsils
were dissected: 6μm-thick transverse sections were stained with H&E. Villus height
and basal width at the crypt-villus junction, nodular unit width and height, follicular
width and muscular layer width were measured with a linear graticule.
Number of follicles per nodular unit was determined under light microscope. Results showed a dose dependent change in all histomorphometric parameters due to Z. multiflora
administration. Compared with
controls Z. multiflora fed birds had shorter and more flattened villi,
decreased nodular unit width with increased height, wider follicles in the 1.5
& 2% groups, marked increase in number of follicles per nodular unit
especially at the 2% level and decreased muscular layer width again mostly in
the 2% group. The results suggest that dietary supplementation with Z. multiflora during the rearing period of broilers
may have altered cecal tonsil tissue histology.
Key
words: Cecal tonsil; histology; Zataria multiflora; broilers
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