Breeding for Resistance to Boophilus Microplus in Australian Illawarra Shorthorn and Brahman X Australian Illawarra Shorthorn Cattle

Utech, K. B. W.; Wharton, R. H.

doi:10.1111/j.1751-0813.1982.tb02684.x

Cited by 50 publications

(23 citation statements)

References 14 publications

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“…Antibodies to sporozoites, schizonts and piroplasms have been recorded in the colostrum of immune cows and the serum of their calves which protects the calves against theileriosis could be the reason for low prevalence in calves less than a year in our study (Morzaria et al 1988). The resistance of young animals to T. annulata as compared to adults reported in the present study was also in accordance with findings of Utech and Wharton (1982) who reported that young cows were more resistant than older cows. The age-related resistance in young cattle to most tick-borne protozoan and rickettsial diseases has been reported by Bailey (1955) and Dumanli et al (2005).…”

Section: Discussionsupporting

confidence: 93%

Detection of theileriosis in cattle and buffaloes by polymerase chain reaction

Kundave

Patel

et al. 2013

J Parasit Dis

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Bovine tropical theileriosis caused by Theileria annulata is a tick-borne disease of great economic importance in tropical and subtropical regions of the world. The present study was undertaken to detect theilerosis in cattle and buffaloes by polymerase chain reaction (PCR). The diagnosis of theileriosis is usually carried out by blood smear staining technique, which is not sufficiently sensitive to detect the piroplasms in the carrier animals. In this study, a total of 116 samples were collected from infected as well as apparently healthy cattle and buffaloes. Screening of blood smears by Giemsa staining detected 15 samples (12.93 %) positive for Theileria piroplasms out of 116 samples. However, the PCR based screening using the specific primers from the major merozoite-piroplasm surface antigen sequence of T. annulata (Tams1) gene detected 74 samples (63.79 %) positive for T. annulata which included 59 samples found negative by Giemsa staining. Our study suggests that the PCR based screening is more sensitive and accurate method for diagnosis of tropical theileriosis in cattle and buffaloes.

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Section: Discussionsupporting

confidence: 93%

Detection of theileriosis in cattle and buffaloes by polymerase chain reaction

Kundave

Patel

et al. 2013

J Parasit Dis

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“…Over years of selection, resistance has been increased from 89.2 to 99 % in an Australian, Illawarra Shorthorn herd. Concurrently, in this herd the resistance of the progeny increased from 93.7 to 97.7 %, demonstrating that the selection and breeding of cows and bulls resulted in genetic improvement in the resistance of the progeny (Utech and Wharton 1982). Tick resistant breeds of cattle have now been developed in an effort to find animals that are productive (particularly for milk) under tick challenge and in a tropical environment.…”

Section: Breeding and Selection For Host Resistancementioning

confidence: 88%

Breeding strategies for tick resistance in tropical cattle: a sustainable approach for tick control

2013

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About 80 % of world cattle population is under the risk of ticks and tick borne diseases (TTBDs). Losses caused by bovine tick burdens in tropical countries have a tremendous economic impact on production systems. Chemical control of disease has been found to be ineffective and also involving large cost. To reduce our reliance on these chemical products, it is necessary to embark on programs that include habitat management, genetic selection of hosts, and development of a strain capable of inducing host resistance to ticks. Selection for disease resistance provide alternate method for sustainable control of TTBDs. Domestic livestock manifests tick-resistance by skin thickness, coat type, coat color, hair density and skin secretions etc. Zebu cattle have, on average, greater tick resistance than either European cattle or African cattle. Heritability for tick burden in cattle has been shown to range about 0.30, which is sufficient to result in the success of some programs of selection for tick resistance in cattle. To select animals at younger age, to reduce generation interval and to increase genetic gain, marker assisted selection is an important tool. There are also various MHC molecules which are associated with resistance to TTBDs.

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“…Studies show that, in general, the number of ticks on zebu (B. indicus) cattle and their crossbreds (zebu x European) is significantly less than the number found on European breeds (Johnston and Haydock, 1969;O' Kelly and Spiers, 1976;Utech and Wharton, 1982). In Brazil, several workers have also reported different degrees of tick-resistance in cattle, both among and within breeds (Lemos et al, 1985;Oliveira et al, 1989;Oliveira and Alencar, 1990;Fraga et al, 2003).…”

Section: Introductionmentioning

confidence: 98%

Artificial infestation of Boophilus microplus in beef cattle heifers of four genetic groups

et al. 2007

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Resistance of beef cattle heifers to the cattle tick Boophilus microplus was evaluated by artificial infestation of 66 beef cattle heifers of the following genetic groups: 16 Nelore (NE), 18 Canchim x Nelore (CN), 16 Angus x Nelore (AN) and 16 Simmental x Nelore (SN). The animals, with a mean age of 16.5 months, were maintained with no chemical tick control in a Brachiaria decumbens pasture. Four artificial infestations with 20,000 B. microplus larvae were carried out 14 days apart and from day 18 to day 22 of each infestation the number of engorged female ticks (≥ 4.5 mm) was counted on the left side of each heifer. Data were analyzed as the percentage of return (PR = percentage of ticks counted relative to the number infested), transformed to (PR) 1/4 , and as log 10 (C ij + 1), in which C ij is the number of ticks in each infestation, using the least squares method with a model that included the effects of genetic group (GG), animal within GG (error a), infestation number (I), GG x I and the residual (error b). Results indicated a significant GG x I interaction, because AN and SN heifers had a higher percentage of return than CN and NE heifers, while CN heifers showed a higher percentage of return than the NE heifers only in infestations 3 and 4. Transformed percentages of return were NE = 0.35 ± 0.06, AN = 0.89 ± 0.06, CN = 0.54 ± 0.05 and SN = 0.85 ± 0.06.

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Breeding for Resistance to Boophilus Microplus in Australian Illawarra Shorthorn and Brahman X Australian Illawarra Shorthorn Cattle

Cited by 50 publications

References 14 publications

Detection of theileriosis in cattle and buffaloes by polymerase chain reaction

Detection of theileriosis in cattle and buffaloes by polymerase chain reaction

Breeding strategies for tick resistance in tropical cattle: a sustainable approach for tick control

Artificial infestation of Boophilus microplus in beef cattle heifers of four genetic groups

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