Prevalence of Tick-Vectors of Theileria Annulata Infesting the One-Humped Camels in Giza, Egypt

Hassan, Mostafa; Gabr, Hanan S. M.; Abdel-Shafy, Sobhy; Hammad, Kotb M.; Mokhtar, Mostafa

doi:10.21608/jesp.2017.77797

Cited by 23 publications

(24 citation statements)

References 20 publications

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“…(El Kammah et al ., 2007), Babesia ovis (Mazyad & Khalaf, 2002), Theileria annulata , Theileria ovis , and Theilera spp. (Mazyad & Khalaf, 2002; El Kammah et al ., 2007; Hamed et al ., 2011; Youssef et al ., 2015; Hassan et al ., 2017b) were isolated from this species.…”

Section: Resultsmentioning

confidence: 99%

“…and R. pulchellus were non‐endemic species in Egypt; however, these species were collected during this study from imported dromedary camels in two different ecological zones in camel markets in Giza and Aswan. The latter finding was parallel to the previous studies (Barghash et al ., 2016; Hassan et al ., 2017b) which indicated that these species were not recorded before on the local dromedary camels or other domestic ones in Egypt. This finding may attribute to tick collections from imported dromedary camels arrived at Egyptian camel markets from Sudan, Ethiopia, Nigeria, and Somalia.…”

Section: Discussionmentioning

confidence: 99%

“…The sex ratio (M/F) varied among diverse tick species; H. dromedarii and H. excavatum showed a higher rate of male specimens than female specimens, in contrast R. sanguineus and R. annulatus had a higher rate of females than males. These same findings were in agreement with the previous studies (Bakirci et al ., 2012; Fard et al ., 2012; Shemshad et al ., 2012; Abdullah et al ., 2016; Hassan et al ., 2017b; Perveen et al ., 2020).…”

Section: Discussionmentioning

confidence: 99%

“…These efforts initiated a very good collection archived by NAMRU‐3 for years; however, most of these efforts were limited to health‐related surveillance programs (Liebish et al ., 1989). Numerous studies had been made on the medical and veterinary importance of hard ticks that infest domestic animals in Egypt (El Kady, 1998; El Kammah et al ., 2001; Adham et al ., 2009; Abdel‐Shafy et al ., 2012; Ghoneim et al ., 2017; Hassan et al ., 2017a, 2017b). Few taxonomical and morphological studies of hard ticks in Egyptian fauna were alternatively carried out (Hoogstraal & Kaiser, 1958, 1959; Abdullah et al ., 2016).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hard ticks (Acari: Ixodidae) infesting domestic animals in Egypt: diagnostic characters and a taxonomic key to the collected species

Okely

Anan

GadAllah

et al. 2021

Medical Vet Entomology

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Ticks are important vectors of emerging health problems in humans and animals. We conducted several field surveillances to investigate the fauna of hard ticks on domestic animals in seven governorates of Egypt during 2018–2019. A total of 3265 individual tick specimens were collected and identified to the species level; the specimens belong to 11 species within three genera (Amblyomma, Hyalomma, and Rhipicephalus). Tick infestation was highest in dromedary camels (70%), followed by dogs (52.5%), cattle (50%), buffaloes (38%), and horses (12%). Ten species were collected from dromedary camels, 2 from cattle, and one species from dogs, buffaloes, and horses. Diagnostic characters with high‐quality photographic images of the 11 tick species were provided. New measurements of the body regions such as spiracles and body grooves were also obtained to provide further details on morphological variations among the diverse tick species. This study provided detailed descriptions of the genital apertures of five Hyalomma species. Morphological variations of male Hyalomma impeltatum, and genital apertures of female Hyalomma dromedarii and Hyalomma excavatum were also examined in this study. Finally, we provided additional details on local geographic distributions, hosts, endemicity status, and disease relationships of the eleven tick species.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hard ticks (Acari: Ixodidae) infesting domestic animals in Egypt: diagnostic characters and a taxonomic key to the collected species

Okely

Anan

GadAllah

et al. 2021

Medical Vet Entomology

View full text Add to dashboard Cite

show abstract

“…It is the dominant tick species infesting camels in the Middle East and North Africa (MENA) region ( 7 , 8 ). Hyalomma dromedarii has a vital role in the transmission of tick-borne pathogens such as Theileria, Rickettsia, Francisella , Crimean-Congo hemorrhagic fever virus (CCHFV), and other viruses ( 9 – 15 ), and poses a serious threat to the camel farming industry. Global climate change, and socio-economic and environmental factors allow ticks and tick-borne pathogens to invade and adapt to new ecological niches ( 16 ).…”

Section: Introductionmentioning

confidence: 99%

Assessing Temporal Changes in Microbial Communities in Hyalomma dromedarii Collected From Camels in the UAE Using High-Throughput Sequencing

et al. 2022

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Ticks (Acari) are ectoparasites of animals that harbor communities of microbes of importance to animal and human health. Microbial communities associated with ticks exhibit temporal patterns of variation in their composition, with different genera dominating at different times of the year. In this study, molecular tools were used to assess the composition of the microbial communities associated with Hyalomma dromdarii. Adult ticks were collected every month for 1 year from 25 camels in the UAE. A total of 12 DNA pools were prepared (one pool for each month). We monitored the microbiota of ticks using high-throughput sequencing of the V3–V4 region of the bacterial 16S rRNA gene. A total of 614 operational taxonomic units were produced through de novo clustering and belonged to 17 phyla, 30 classes, 46 orders, 118 families, and 222 genera. Fifteen bacterial families were found to be the most abundant. The dominant bacterial communities associated with H. dromedarii belonged to the genera Staphylococcus, Bacillus, Francisella, and Corynebacterium, which were reported with high relative abundance from all months. No significant correlation occurred between the abundance of microbial families or genera in H. dromedarii ticks and the ambient temperature. Our findings revealed, for the first time in the UAE, temporal fluctuations of microbial communities in H. dromedarii ticks and provided key insights on the interaction between different microbial groups. Moreover, our results contribute to the current understanding of disease development and allow more investigations for potentially pathogenic microbiota.

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Molecular identification and morphological variations of Amblyomma lepidum imported to Egypt, with notes about its potential distribution under climate change

Abouelhassan,

GadAllah,

Kamel

et al. 2024

Parasitol Res

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The tick Amblyomma lepidum is an ectoparasite of veterinary importance due to its role in transmitting livestock diseases in Africa, including heartwater. This study was conducted in 2023 to monitor Amblyomma spp. infestation in dromedary camels imported from Somalia, Ethiopia, and Sudan to Egypt. This study inspected 200 camels at the Giza governorate’s camel market that had been imported from Somalia, 200 from Ethiopia, and 200 from Sudan for tick infestation. Specimens were identified using morphological characteristics and phylogenetic analyses of the 12S and 16S rRNA genes. Clusters were calculated using an unweighted pair-group method with arithmetic averages (UPGMA) dendrogram to group the specimens according to their morphometric characteristics. The morphometric analysis compared the body shape of ticks collected from different countries by analyzing dorsal features. Principal component analysis (PCA) and canonical variate analysis (CVA) were performed to obtain body shape variation among specimens from different countries. Results indicated that camels were infested by 57 males Amblyomma lepidum, and no female specimens were observed; among these specimens, one may have a morphological abnormality. The results suggest that A. lepidum specimens collected from camels imported to Egypt from African countries exhibit locally adapted morphology with variations among specimens, particularly variations in body size. This adaptation suggests minimal potential for genetic divergence. Ecological niche modeling was used to predict the areas in Africa with suitable climates for A. lepidum. The study confirmed that East African countries might have the most favorable climatic conditions for A. lepidum to thrive. Interestingly, the amount of rain during the wettest quarter (Bio16) had the strongest influence on the tick’s potential distribution, with suitability decreasing sharply as rainfall increased. Future predictions indicate that the climatic habitat suitability for A. lepidum will decrease under changing climate conditions. However, historical, current, and future predictions indicate no suitable climatic habitats for A. lepidum in Egypt. These findings demand continuous surveillance of A. lepidum in camel populations and the development of targeted strategies to manage tick infestations and prevent the spread of heartwater disease.

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Prevalence of Tick-Vectors of Theileria Annulata Infesting the One-Humped Camels in Giza, Egypt

Cited by 23 publications

References 20 publications

Hard ticks (Acari: Ixodidae) infesting domestic animals in Egypt: diagnostic characters and a taxonomic key to the collected species

Hard ticks (Acari: Ixodidae) infesting domestic animals in Egypt: diagnostic characters and a taxonomic key to the collected species

Assessing Temporal Changes in Microbial Communities in Hyalomma dromedarii Collected From Camels in the UAE Using High-Throughput Sequencing

Molecular identification and morphological variations of Amblyomma lepidum imported to Egypt, with notes about its potential distribution under climate change

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