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Original Article | Open Access | Int. J. Agric. Vet. Sci., 2022; 4(2), 39-45 | doi: 10.34104/ijavs.022.039045

Identification and Affliction of Ixodid Tick Species in Domestic Animals

Hassen Yusuf Bekere* Mail Img Orcid Img ,
Nasrin Tamanna Mail Img ,
Md. Badiruzzaman Mail Img ,
Md. Mosharraf Hossen Mail Img ,
Daniel Abebe Mail Img ,
Mohammed Sham Hussen Harun Mail Img ,
Mohammed Hassen Abdi ,
Yasin Osman Yusuf Mail Img

Abstract

Research on local breeds of cattle was conducted from November 2018 to April 2019 to identify major Ixodid ticks species and their prevalence. Sampled livestock from farmer associations was contingent selected by multistage sampling technique and then tested for tick infestation. Out of a total of 425 cattle examined, 120(28.57%) were infected with one or more tick strains. About 947 mature ticks were assembled and identified at the level of genes and species from animal organs. Three tick strains of three (3) genera (Amblyomma, Boophilus, and Rhipicephalus) were recognized. The one flesh prevalence of each strain was A. variegatum (61.08%), B. decoloratus (34.69%), and R. evertsi evertsi (4.11%). A. variegatum shows a higher preference for udder, scrotum, and axial; B. decoloratus were dewlap and mainly available Neck, abdomen, and groin; R. evertsi evertsi prefers perianal and valva, and below the tail area of the body. Tested between different age and sex categories of animals, the transmission was constructed to be statistically insignificant (P >0.05) whereas, transmission between body state values was constructed to be statistically significant (P <0.05). It has come to an end that conventional tick species may also be overseen for the infection Tick-borne abnormalities in addition to the physical loss to the skin. Therefore, further studies should be carried out on tick burden and tick-borne diseases thereby mitigating prevention and control strategies. 

INTRODUCTION

Africa has the largest livestock and draft animal population in the continent which has reached the count of approx 56,706,379 cattles, 29,332,372 sheep, 29,112,953 goats, 2,033,105 horses, 400,319 mules, 7,418 donkeys, 1,164,116 camels, and 56,866,709 chickens in the country (CSA, 2014). In spite of the diverse population of animals, productivity in Ethio-pia is low, and often below average for most East and Sub-Saharan African countries, due to prevailing animal diseases (bacterial, viral, protozoan agents of infection), poor nutritional status, ectoparasitic. Effec- tive management of activity, reproductive insuffi-ciency and existing limitations (Bekele et al., 2010).

Vectors and vector-borne diseases constitute major obstacles to the development of viable livestock in-dustries (Mekuria, 1987). Among them, ticks and tick- borne disease outbreaks (TBDs) are prevalent through- out the world, especially in humid and subtropical countries, which are of great productive importance in livestock production (Kettle, 1995). It is estimated that 80% of the worlds livestock population is ex-posed to tick infestation (FAO, 1984). The annual productive losses caused due to ticks and tick-borne diseases in cattle alone, are estimated at 13.9 to 18.7 billion USD worldwide (de Castro, 1997). The pro-blem is persistent and severe in developing countries where the available resources for the control and eradication of ticks and TBD are restricted. In most parts of Africa, including Ethiopia, tick and TBD such as babesiosis, cowdriosis and anaplasmosis has economic significance. In Ethiopia, ticks are external parasites or ectoparasites that are considered respon-sible for maximum economic loss due to livestock infestations, particularly affecting cattle (Solomon et al., 2001). Several species of ticks belonging to the genus Amblyomma, Boophilus, Rhipicephalus, Hyalo- mma, and Haemaphysalis have been reported. Exis-ting records are suggestive of considerable losses to the livestock and the economy of Ethiopia, ranking it third among the major parasitic diseases prevalent in the country. The environmental condition and vege-tation of Ethiopia was considered as highly con-ducive for the vectors, and the associated diseases they cause (Pegram et al., 1981). Besides disease transmission, ticks inflict heavy economic losses. Tick infestations are severe in different parts of Ethiopia and at a conservative estimate; one mil-lion USD is lost annually to the rejection of down-graded hides and skin, on account of the damage caused by ticks. It is estimated that an annual loss of 5,000,000 USD is incurred due to the downgrading of hide and skin having been affected by ticks, and approxi-mately 65.5% of the major defects associated with hides in eastern Ethiopia were due to ticks (Hayle et al., 2020; Bekele, 2002; Gashaw, 2005).

Investigations aimed at determining the extent of infection and the type of species involved will play a great role in designing strategic control of these parasites. Moreover, identification to a species level will help in the diagnosis of various tick-borne dis-eases and their respective control programs. Even though Ethiopia confronts considerable losses due to tick contagions, and present research has reported the distribution and plentifulness of tick species across various parts of the country, there are no evi-dences supporting the species identification and dis-tribution of hard ticks. Therefore, the main objec-tives of this research were: to analyse the prevalence of ixodid ticks and identify them in the analysis area; to provide baseline data on the relative dissemination of tick species.

MATERIALS AND METHODS

Study Area Description

The research study was convoyed in Mesela Shanan Dhugo (SD) district and partial collaborated work was conducted in Bangladesh and South Korea. Mesela is located in Western Hararghe zone of Oromia region, Ethiopia. It is situated 395 km East of Finfine and 74 km from Chirozonal town. The district has daily mean temperature ranging from 140C-340C and mean annually rain fall ranging from 460mm-930 mm. The agro ecological zone of the district high-land 20%, amid highland 60% and desert 20% and its altitude is between 1200-2700m, and the soil type is silt, sand and clay. The livestock population of the district are 82,137 cattle, 31,507 goats, 15,746 sheeps, 68,683 poultry, 8315 donkeys, and 198 horses & 188 mules. The total area coverage of the district is 65,440.95 hectares, of which 21,584 hectare is culti-vated land, 5769.55 hectare is forest land, and 17153.522 hectare is bush land, 11,523.05 hectare is miscellaneous land and others. The district has 25 peasant associations and one town with total human population of 151,698 of which male 76,864 and female 74,834 (ARDO, 2014).

Area and Study Population 

The research animal is local breed of cattle belon-ging to six selected farmer associations of Mesela (SD) district. Farmer associations were selected on the basis of their accessibility to transport.

Planning and Study Design

A cross-sectional survey was conducted on local breed cattle found in and around Mesela (SD) dis-trict, from November 2018 to April 2019 to identify the main Ixodid ticks, their predilection sites and tick burden, body condition score among different age groups, and gender of animals.

Determination of Sample Size and Sampling 

Animals sampled from six farmer associations in Mesela (SD) district were selected by multi-stage sampling technique. The names of the sampled atten-dants and their respective animals were recorded in the prepared format to avoid the risk of repeat sampling. The sample size required for the study was analysed by the formula given by Truesfield, (1995) 50% expected prevalence, 5% desired precision and 95% confidence interval. Although, the necessary sample size was calculated as 384, a total of 425 animals were tested to increase the accuracy of the investigation.

n= 1.962 Pexp(1-Pexp)

d2

Where, n = needed sample size 

Pexp= expected prevalence 

d= desired precision 

Identification and Tick Sample Collection 

The entire body surface of animals was thoroughly examined and adult ticks were collected from one side of the animals body and placed in a universal bottle containing (10%) formalin. The bottles were labeled according to the location of predetermination and animal samples were taken and then sent to Hirna Regional Veterinary Laboratory. All assem-bled ticks were analysed under a stereomicroscope and identified to strains level using the taxonomic key described by Kaiser, (1987) and Walker et al. (2003). 

The number of ticks from each animals half-body zone was doubled to capture an equal number of ticks on both sides of an animal. Ticks are generally characterized by base of capituli, ornamentation of scutum, festoon, Coxae I, xenothosoma length, site preference and host location.

Data Analysis and Entry 

Assembled data were pushed and managed in Micro-soft Excel and then descriptive statistics were perfor-med using SPSS software version 19. Tick preva-lence was analysed by dividing the number of posi-tive samples by the total number of samples size, and is expressed as a percentage. Descriptive statistics were used to show the favoured predilection sites of tick species. χ2 test with a calculated P-value less than 0.05 was used to evaluate the statistical signi-ficance of tick infection rates with sex, age group as well as animal body state scores.

RESULTS

Out of a total of 425 animals examined, 120(28.57%) were found to be invade with one or more ticks. Baha Biftu and Aba Kabsi were found to have the highest and lowest ubiquity of tick infestation at 41.42% and 22.85%, respectively, among the farmer associations (Table 1).

From the total of 947 ticks collected, 3 genera and 3 strains were explored, of which A. variegatum ac-counts 579 (61.08%), B. decoloratus 327 (34.69%) and R. evertsi evertsi 39 (4.11%). From the total count, A. variegatum was the dominant tick species (61.08%) and R. evertsi evertsi (4.11%) was the least. The higher proportion of ticks was collected on ani-mals from Baha Biftu (19.62%) while the lower on animals from Aba Cabsi (11.81%) (Table 2).

Table 3: Association among tick affliction, sex, duration, and age of animals by x2.

Out of 425(206 male and 219 female) cattle tested for tick affliction, 51(23.75%) male and 69(31. 24%) female cattle were found positive for the presence of ticks on their skin. The highest number of tick affli-ctions (75 out of 120) was found in cattle over 3 years of age and the least (6 out of 120) in calves. In different age and sex groups of animals tested, trans-mission was found to be statistically insignificant (P >0.05) (Table 3).

Table 4: The association between tick affliction and body condition of the animals by x2.

Out of the total animals examined, 26 and 399 cattle respectively were in good physical condition. 11 out of 26 poor condition animals (60. 90%) and 106 out of 399 good condition animals (25.81%) were positive for ticks on their skin whereas infection was not statistically significant in body state scores (P <0.05) (Table 4).

Table 5: Distribution of the ticks in different parts of body of animals.

Ticks were assembled from seven body areas such as dewlap and neck, abdomen and groin, axilla, tes-ticles, vulva and perianal, tail and sole. Various species of ticks are found to prefer different pre-dilection sites where A. variegatum is mainly found in the soles, testicles and axils, whereas B. deco-loratus is found in abundance on the dewlap and neck and abdomen and groin and R. evertsi evertsi predominates in the perianal area. The vulva and the underside of the tail of the animals tested (Table 5). 

DISCUSSION

The dissemination and multitude of cattle, the most common tick stains in Ethiopia, varies widely from one region to another. In this research, a total of 948 ticks were assembled from a total of 425 local breeds with an overall ubiquity of 28.57%. This finding agrees with the results of Belew & Mekonnen, (2011) and Asrate & Yalew, (2012). However, this is numerous from the findings of Nigatu & Teshome, (2012) and Alemu et al. (2014) who reported an overall ubiquity of 88.4% and 80.25%, respectively. This difference may be due to differences in agro-climatic conditions of the study area. Tick activity was influenced by rainfall, altitude and at-mospheric relative humidity (Pegram et al., 1981). The three genera of the hard ticks were explored; A. varie-gatum, R. evertsi evertsi, and B. decolouratus were the species of ticks explored in the study area. A. variegatum was the most abundant of all tick spe-cies comprising 61.08% of the ticks collected at the study site and this result is in agreement with various reports made by other authors in different parts of Ethiopia viz Naser (1985) and Michael, (1993) in Wolaita zone, Tessema & Gashaw, (2010) in Assela et al. (2011) in Holeta et al. (2012) in Haramaya. This may be due to the fact that A. variegatum is the most polpular and widely allocated cattle tick in Ethiopia (Morel, 1980; Pegram et al., 1981; Assefa, 2004). It has a great productive importance, because it is an efficient vector of Cowderiaruminatum, The-leriamutan, Theleriavelifera, and viral diseases, Nai-robi sheep disease and also aggravates the situation of bovine dermatophilosis (Sileshi et al., 2007). Among the tick stains A. variegatum causes the greatest loss to hides and skin because of its long mouth part which extends the commodity valueless on world market if the ticks are in high number (Taylor et al., 2007). B. decolouratus was identified as the second tick species at the study site cons-tituting 34.69% of the total tick collection. This spe-cies is known to be widely distributed in the central Rift Valley region of Ethiopia (Pegram et al., 1981; Solomon et al., 2001) and this result is agreed with the reports of Asrate & Yalew, (2012) in Haramaya. But this finding is disagreed with the reports of Teshome et al. (1995); Shiferaw, (2005) in Wolaita zone, Tamiru, (2008) in Assela et al. (2013) in Sou-thern Nations, Nationalities, and Peoples Region, who reported highest prevalence in their study area, and Sileshi et al. (2007) who described that B. de-colaratusis the commonest and The most widespread tick in Ethiopia, collected in all administrative re-gions except Afar region. This may be due to geo-graphical location and altitude factors. One-host ticks of the genus Buphilus that parasitize livestocks are a hindrance to livestock farming in humid and subtropical countries. They convey the causative agents of anaplasmosis and babesiosis in cattle (Wal-ker et al., 2003). R. evertsi evertsi was the third most abundant tick species constituting 4.11% of the adult ticks collected is comparable to the results of Solomon et al. (2007). Hogstral, (1956) described its wide distribution throughout the Ethiopian faunal region. Pegram et al. (1981) It has been reported that this species does not show a specific preference for a particular altitude, rainfall zone or seasons; R. evertsi evertsi has small mouthparts with which it feeds on soft surfaces. Consequently, it is a potential vector of Babesia, Theleria and Rickettsia (Kettle, 1995) and it is also known to cause tick paralysis in Harar, Ethio-pia (Morrell, 1980). The proportion of tick infes-tation was higher in animals with poor body con-dition (60.90%) than in animals with good body condition (25.81%). It was known that animals are less resistant to tick infection due to poor physical condition and lack sufficient physical potential to develop resistance with increasing age. Several aut-hors have reported high infestations of ticks results in poor body state due to losses of high amounts of blood and fluid by ticks (Bianchi et al., 2003) re-ported that the British cattle breeds having the lowest body state score under tropical conditions had the highest affliction of ticks (Kettle, 1995; Bianchi et al., 2003; Gazali, 2010) reported that tick load ani-mal is affected by breed and nutritional stress. Ulti-mately, this factor affects general body state, which affects blood component, respiration rate, appetite, and ultimately leads to a poor body state score. This current research is in agreement with the previous studies mentioned above. In terms of predilection sites for attachment, different ticks stains show different site preferences. A. variegatum is found in udder, scrotum and axial whereas the B. decoloratus species were found on the dewlap and neck and belly and groin. R. evertsi evertsi shows high preference for perianal and vulva followed by lower tail region. In the current study tick affliction rate was 24.21% on dewlap and neck, sole (25%), scrotum (22.31%), axilla (12.29%) and groin and abdomen (7.96%). Factors such as host density, interactions between tick species, time and season, and accessibility to grooming determine tick attachment sites (Solomon & Kassa, 2001). The predilection sites found in this study were in line with those reported by Siyoum, (2001) and Behailu, (2004) in their study conducted in North Wollo zone and Asella, respectively. The main choice for tick control in the Mesela (SD) district is the use of acaricides. Currently Ivermectin and organophosphate acaricides are the most com-monly used chemicals. Tick control can also be achieved by attacking one or more larval stages along the life cycle chain (FAO, 1984). In addition to acaricide application, appropriate livestock man-agement, zero-grazing, breeding of tick-resistant cattle and implementation of traditional practices are quite important. 

CONCLUSION AND RECOMMENDATIONS

Important and abundant tick species to investigate in this study area were A. variegatum, R. evertsi evertsi and B. decoloratus. Acaricide application is the main method of tick control in the district. However, the attention given to infection control was not enough. One should manage the tick at an economically ac-ceptable level It requires a combination of tech-niques and tick knowledge species identification, prevalence and an understanding of their epidemio-logy. This includes selection Tick resistant cattle, acaricide treatment, appropriate livestock manage-ment, evaluation and incorporation of traditional practices or remedies that appear to be of value. 
In light of the above conclusion the following recom- mendations are forwarded -
1) More surveillance should be given to integrated tick control options through the use of one or more methods like appropriate pasture manage-ment in communal grazing area and increase of good nutrition plane to get good performance of productive breeds in the area.
2) Tick control activities (application of acaricides) should be planned and applied on regular basis depending on the seasonal variations.

ACKNOWLEDGEMENTS

We have no word to express our gratitude and thanks to my beloved and generous parents next to Allah!  Next we would like to extend our appreciation and gratitude to our kindly advisors Dr. Daniel Abebe that helped us throughout the thesis work. We also grateful especially to our beloved and excellency brothers Mohammed Yusuf, Abrahim Yusuf, Hussen Yusuf and Mohammed Hassen for their endless assistance by moral, financial and technical support in completion of this research study.

CONFLICTS OF INTEREST

The authors declare that the manuscript has no competing interests to the publication.

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Article Info:

Academic Editor 

Dr. Phelipe Magalhães Duarte, Professor, Department of Veterinary, Faculty of Biological and Health Sciences, University of Cuiabá, Mato Grosso, Brazil.

Received

March 21, 2022

Accepted

April 19, 2022

Published

April 29, 2022

Article DOI: 10.34104/ijavs.022.039045

Corresponding author

Hassen Yusuf Bekere*
DVM, Haramaya University, Ethiopia.

Cite this article

Bekere HY, Tamanna N, Badiruzzaman M, Hossen MM, Abebe D, Harun MSH, Abdi MH, and  Yusuf YO. (2022). Identification and affliction of ixodid tick species in domestic animals. Int. J. Agric. Vet. Sci., 4(2), 39-45. https://doi.org/10.34104/ijavs.022.039045 

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