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OJVRTM
Online Journal of
Veterinary Research©
Volume 9 (1) : 66-73, 2005. Redacted 2018.
Distribution of Taenia saginata
cysts in carcases and implications for meat inspection
Wanzala Wa, Onyango-Abuje
JAb, Kangethe EKc, Zessin KHd, Kyule
MNd, Ochanda Ha, Harrisone
LJS.
aDivision of Parasitology and Immunology,
Department of Zoology, University of
Nairobi, P.O. Box 30197-00100 GPO, Nairobi, Kenya (Correspondent person:
E-mail: wwanzala@icipe.org or osundwa1@yahoo.com ). bNational Veterinary Research Centre, Muguga, P.O. Box 32, Kikuyu, Kenya. cDepartment
of Public Health, Pharmacology & Toxicology, University of Nairobi, P.O. Box 29053, Nairobi, Kenya. dDepartment of International
Animal Health, Freie University Berlin, FB Veterinärmedizin, Luisenstraße
56, D- 10117 Berlin, Germany. eCentre for Tropical Veterinary Medicine, University of Edinburgh, Easter Bush, Roslin,
Midlothian, EH25 9RG, Scotland, UK.
Wanzala W, Onyango-Abuje JA, Kangethe
KE, Zessin KH, Kyule NM, Ochanda
H, Harrison SJL., Distribution
of Taenia saginata cysts in
carcasses and the implications for meat inspection, Onl J Vet Res., 9 (1) 66-73, 2005. The distribution of T.saginata
cysts in carcasses of naturally (n = 25) and artificially (n = 30) infested
animals was studied using total dissection as a gold standard method. In each
group, both live and dead cysts were widely distributed in predilection and
non-predilection sites with some carcasses without any cysts. In artificial
infestations, 1663 cysticerci
were recovered, of which 864 (51.95%) were alive and 799 (48.05%) were dead,
while in natural infestations, 671 cysticerci were recovered, of which 361(53.80%) were alive
and 310 (46.20%) were dead. Meat inspection revealed 12 carcasses with cysts in
each group, with cysts in heart (2.98%), tongue (1.79%), Triceps brachii (1.04%) and none in masseter and pterygoid in
natural infestations. Artificial infestations had cysts in the heart (5.29%),
Triceps brachii (1.80%), masseter and pterygoid
(0.66%) and tongue (0.54%) during meat inspection. During total dissection,
cysts ranked from liver (22.00%), heart (17.13%), hind limbs (15.02%), fore
limbs (13.35%), chest (6.49%), neck and back (6.01%), pelvis (4.39%), lumbar
(4.09%), lungs (3.91%), tongue (2.52%), head (2.40%), diaphragm (2.10%), rumen
(0.54%) to kidneys (0.00%) in carcasses of artificially infested animals. In
carcasses of naturally infested animals, the order was from fore limbs
(24.74%), hind limbs (23.85%), liver (12.22%), chest (9.24%), heart (8.79%),
lumbar (6.56%), pelvis (3.58%), tongue (3.28%), lungs (2.98%), neck and back
(2.38%), head (1.49%), diaphragm (0.75%), kidneys (0.15%) to rumen (0.00%). The
distribution of cysts in
carcasses and the implications for meat inspection under the present
Kenya Meat Control Act-1977 are discussed.
Key words: Taenia saginata
cysts, bovine cysticercosis,
diagnosis, meat inspection, total dissection