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Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses

Tick resistance and the effects of dexamethasone and anti-histamine were investigated in four Kedah-Kelantan (KKKK), four FI Kedah-Kelantan X Friesian (KKFF), and four 25% Kedah-Kelantan X 75% Frieisian (KFFF) using experimental tick infestations. Experimental animals were infested (20,000 larvae) o...

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Main Author: Abdulla, Mahmood Ameen
Format: Thesis
Language:English
English
Published: 1997
Online Access:http://psasir.upm.edu.my/id/eprint/12199/1/FPV_1997_9_A.pdf
http://psasir.upm.edu.my/id/eprint/12199/
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spelling my.upm.eprints.121992014-08-28T08:53:48Z http://psasir.upm.edu.my/id/eprint/12199/ Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses Abdulla, Mahmood Ameen Tick resistance and the effects of dexamethasone and anti-histamine were investigated in four Kedah-Kelantan (KKKK), four FI Kedah-Kelantan X Friesian (KKFF), and four 25% Kedah-Kelantan X 75% Frieisian (KFFF) using experimental tick infestations. Experimental animals were infested (20,000 larvae) on four occasions with an interval of two months between infestations to determine tick responses and haematological and cellular responses of the host. Subsequently, the effects of dexamethasone and anti-histamine were investigated. Number of ticks, their weight, weight of egg masses and number of hatched larvae were significantly (P<0.05) lower in KKKK than in their crosses. At tick attachment sites, infiltration and degranulation of eosinophils and basophils were the striking changes. KKKK expressed intense eosinophil and basophil response than their crosses. Mast cells were completely ablated at 24 h post infestation indicative of their degranulation. Animals treated with dexamethasone were susceptible to B. microplus larvae as shown by the production of a high number of engorged female ticks, high mean weight of replete ticks, mean weight of egg masses and number of larvae. There was a reduction or complete ablation of cellular infiltration particularly of eosinophils at tick feeding sites in all genotypes. There was little or no effect of anti-histamine treatment on the acquisition of resistance. On the contrary, animals treated with anti-histamine and dexamethasone became more susceptible to B. micro plus larvae. Eosinophil number was higher in anti-histamine treated than those receiving both anti-histamine and dexamethasone in all genotypes. The high tick resistance of Kedah-Kelantan (KKKK) may be attributed to reduction of ticks numbers, presence of degranulated eosinophils and basophils, the absence of immunosuppression, and release of histamine at tick attachment sites from degranulated eosinophils and basophils. Histamine initiates an immediate hypersensitivity reaction leading to self-grooming. As a result, the number of engorged ticks were reduced or absent in Kedah-Kelantan than in their crosses. 1997-04 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/12199/1/FPV_1997_9_A.pdf Abdulla, Mahmood Ameen (1997) Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses. PhD thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description Tick resistance and the effects of dexamethasone and anti-histamine were investigated in four Kedah-Kelantan (KKKK), four FI Kedah-Kelantan X Friesian (KKFF), and four 25% Kedah-Kelantan X 75% Frieisian (KFFF) using experimental tick infestations. Experimental animals were infested (20,000 larvae) on four occasions with an interval of two months between infestations to determine tick responses and haematological and cellular responses of the host. Subsequently, the effects of dexamethasone and anti-histamine were investigated. Number of ticks, their weight, weight of egg masses and number of hatched larvae were significantly (P<0.05) lower in KKKK than in their crosses. At tick attachment sites, infiltration and degranulation of eosinophils and basophils were the striking changes. KKKK expressed intense eosinophil and basophil response than their crosses. Mast cells were completely ablated at 24 h post infestation indicative of their degranulation. Animals treated with dexamethasone were susceptible to B. microplus larvae as shown by the production of a high number of engorged female ticks, high mean weight of replete ticks, mean weight of egg masses and number of larvae. There was a reduction or complete ablation of cellular infiltration particularly of eosinophils at tick feeding sites in all genotypes. There was little or no effect of anti-histamine treatment on the acquisition of resistance. On the contrary, animals treated with anti-histamine and dexamethasone became more susceptible to B. micro plus larvae. Eosinophil number was higher in anti-histamine treated than those receiving both anti-histamine and dexamethasone in all genotypes. The high tick resistance of Kedah-Kelantan (KKKK) may be attributed to reduction of ticks numbers, presence of degranulated eosinophils and basophils, the absence of immunosuppression, and release of histamine at tick attachment sites from degranulated eosinophils and basophils. Histamine initiates an immediate hypersensitivity reaction leading to self-grooming. As a result, the number of engorged ticks were reduced or absent in Kedah-Kelantan than in their crosses.
format Thesis
author Abdulla, Mahmood Ameen
spellingShingle Abdulla, Mahmood Ameen
Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
author_facet Abdulla, Mahmood Ameen
author_sort Abdulla, Mahmood Ameen
title Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
title_short Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
title_full Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
title_fullStr Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
title_full_unstemmed Effects of Boophilus Microplus Larval Infestation on Kedah - Kelantan Cattle and Their Bos Taurus Crosses
title_sort effects of boophilus microplus larval infestation on kedah - kelantan cattle and their bos taurus crosses
publishDate 1997
url http://psasir.upm.edu.my/id/eprint/12199/1/FPV_1997_9_A.pdf
http://psasir.upm.edu.my/id/eprint/12199/
_version_ 1643824972510003200
score 13.211869

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