Prevalence, seasonal dynamics and associated variables of ixodid tick cattle infestation in Gondar, northwestern Ethiopia

Mohamed, Abdifetah; Fedlu, Muhammed; Nigussie, Taju; Wali, Mahamed Abdi

doi:10.1016/j.parepi.2023.e00294

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…24 Recently published articles from Gondar, Eastern Hararghe, and Selamago support the current and previous studies finding in Ethiopia, where Amblyomma is the predominant genus. 19,25,26 The overall prevalence of tick populations in the Selamago district was significantly (P < .05) higher compared to non-infected ones.…”

Section: Discussionmentioning

confidence: 89%

Prevalence, Species Identification, and Associated Risk Factor Ixodid Tick Infestation of Cattle in Selamago District Southern Ethiopia

Belete,

Mekuria

2023

Environ�Health�Insights

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Background: Ticks are blood-sucking external parasites of livestock and humans; and can transmit pathogens beyond their direct effect during biting. Ticks are distributed in different agro-ecological zones. The study’s objectives were to determine the species of ixodid ticks, estimate prevalence, and link the presumptive risk variables. Material and methods: A cross-sectional study was conducted from November 2022 to June 2023 in Selamago district, Southern Ethiopia. A total of 384 cattle managed under extensive grazing systems were selected proportionally based on cattle population, from 3 kebeles, which is the lowest administrative structure of government, and individual animals were selected using systematic random sampling techniques at an interval of 5 animals; as the results, 153, 128, and 103 cattle were selected from Hana, Marsiyo, and Geyo kebeles, respectively. Results: 262 animals (68.2%) were found to be infested with one or more tick species. In this study, there was a statistically significant difference in prevalence between sexes and age groups ( P < .05). A higher prevalence was recorded in female and adult cattle than respective group. A total of 579 ticks were collected; 4 genera and 7 tick species were identified. As a result, Ambylomma variegatum, Amblyomma gemma, Amblyomma lepidum, Rhipicephalus (Boophilus) decoloratus, Rhipicephalus pulchellus, Rhipicephalus evertsi evertsi, and Hyalomma truncatum were observed. Among the species identified in the study area, Ambylomma variegatum was the most abundant tick (32.3%) and Hy. truncatum was the least prevalent (4.3%). Ticks on animals’ body were recovered more dominantly around the perineum region, udder, scrotum, and dewlap, followed by the belly, head, and neck. Male ticks were more frequently encountered than females. Conclusion: The finding shows a high tick infestation, and adult age groups were more affected and had a serious problem. Hence, prompt control measures are required to rescue the livelihood of the community and economic loss.

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Section: Discussionmentioning

confidence: 89%

Prevalence, Species Identification, and Associated Risk Factor Ixodid Tick Infestation of Cattle in Selamago District Southern Ethiopia

Belete,

Mekuria

2023

Environ�Health�Insights

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Crimean‐Congo haemorrhagic fever outbreak in Northern Senegal in 2022: Prevalence of the virus in livestock and ticks, associated risk factors and epidemiological implications

Ngom,

Khoulé,

Faye

et al. 2024

Zoonoses and Public Health

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ObjectiveCrimean‐Congo haemorrhagic fever (CCHF) is a severe zoonotic arboviral disease that occurs widely in Eastern and Western Europe, Asia and Africa. The disease is becoming of growing public health importance in Senegal. However, analysis of tick infestation, CCHF virus (CCHFV) circulation extent and risk factors during ongoing outbreak are scarce. A thorough outbreak investigation was carried out during a CCHF outbreak in Podor (Northern Senegal) in August 2022.MethodsTicks and blood samples were collected from animals (cattle, goats and sheep) randomly selected from confirmed CCHF human cases houses, neighbourhoods and surrounding villages. Blood samples were tested for CCHFV antibodies using a commercial enzyme‐linked immunosorbent assay (ELISA) test. Tick samples were screened for CCHFV RNA by RT‐PCR.ResultsOverall, tick infestation rate (TIR) and CCHFV seroprevalence of livestock were 52.12% (95% confidence interval (CI): 45.54%–58.64%) and 43.28% (95% CI: 36.33%–50.44%), respectively. The TIRs were 87.7% in cattle, 57.6% in sheep and 20.0% in goats. These rates were significantly associated with location, host species and tick control (p < 0.001) but not with animal age and sex (p > 0.7). CCHFV seroprevalence was 80.4% (95% CI: 67.57%–89.77%) in cattle, 35.4% (95% CI: 25.00%–47.01%) in sheep and 21.2% (95% CI: 12.11%–33.02%) in goats. Age, sex, location, animal host and presence of ticks were significantly associated to the presence of antibodies. The 950 ticks collected included among other species, Hyalomma impeltatum (48.84%) and H. rufipes (10.21%). Five pools of Hyalomma ssp. were found CCHFV RT‐PCR positive. These infected ticks included 0.86% (4/464) of H. impeltatum collected on cattle and sheep and 1.03% (1/97) of H. rufipes collected on a sheep.ConclusionsTo our knowledge, this is the first report on the extend of tick infestation and CCHFV infection in livestock during an outbreak in Senegal. The results highlight the risk of human infections and the importance of strengthening vector, animal and human surveillance as well as tick control measures in this area to prevent CCHF infections in humans.

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Crimean-Congo Hemorrhagic Fever Outbreak in Northern Senegal in 2022: Prevalence of the Virus in Livestock and Ticks, Associated Risk Factors and Epidemiological Implications

Ngom,

Khoulé,

Faye

et al. 2023

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Prevalence, seasonal dynamics and associated variables of ixodid tick cattle infestation in Gondar, northwestern Ethiopia

Cited by 3 publications

References 12 publications

Prevalence, Species Identification, and Associated Risk Factor Ixodid Tick Infestation of Cattle in Selamago District Southern Ethiopia

Prevalence, Species Identification, and Associated Risk Factor Ixodid Tick Infestation of Cattle in Selamago District Southern Ethiopia

Crimean‐Congo haemorrhagic fever outbreak in Northern Senegal in 2022: Prevalence of the virus in livestock and ticks, associated risk factors and epidemiological implications

Crimean-Congo Hemorrhagic Fever Outbreak in Northern Senegal in 2022: Prevalence of the Virus in Livestock and Ticks, Associated Risk Factors and Epidemiological Implications

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