Tick survey on goats and sheep in Kenya

1985 ◽  
Vol 17 (2) ◽  
pp. 102-106 ◽  
Author(s):  
E. N. Mwangi ◽  
P. D. Sayer ◽  
J. C. Njanja ◽  
J. F. Bell
Keyword(s):  
Tick Survey

scholarly journals Validating a common tick survey method: cloth-dragging and line transects

2020 ◽  
Vol 83 (1) ◽  
pp. 131-146
Author(s):  
Pia L. Kjellander ◽  
Malin Aronsson ◽  
Ulrika A. Bergvall ◽  
Josep L. Carrasco ◽  
Madeleine Christensson ◽  
...  
Keyword(s):  
Developmental Stage ◽  
Correlation Coefficient ◽  
Coefficient Of Variation ◽  
Intraclass Correlation ◽  
Survey Method ◽  
Nymphal Stage ◽  
Tick Abundance ◽  
Line Transects ◽  
Tick Survey ◽  
Tick Counts

AbstractCloth-dragging is the most widely-used method for collecting and counting ticks, but there are few studies of its reliability. By using cloth-dragging, we applied a replicated line transects survey method, in two areas in Sweden with different Ixodes ricinus tick-densities (low at Grimsö and high at Bogesund) to evaluate developmental stage specific repeatability, agreement and precision in estimates of tick abundance. ‘Repeatability’ was expressed as the Intraclass Correlation Coefficient (ICC), ‘agreement’ with the Total Deviation Index (TDI) and ‘precision’ by the coefficient of variation (CV) for a given dragging distance. Repeatability (ICC) and agreement (TDI) were higher for the most abundant instar (nymphs) and in the area of higher abundance. At Bogesund tick counts were higher than at Grimsö and so also repeatability, with fair to substantial ICC estimates between 0.22 and 0.75, and TDI ranged between 1 and 44.5 counts of difference (thus high to moderate agreement). At Grimsö, ICC was poor to moderate and ranged between 0 and 0.59, whereas TDI remained low with estimates lower or equal to 1 count (thus high agreement). Despite a 100-fold lower abundance at Grimsö, the same level of precision for nymphs could be achieved with a 70% increase of dragging effort. We conclude that the cloth-dragging technique is useful for surveying ticks’ and primarily to estimate abundance of the nymphal stage, whereas it rarely will be recommended for larvae and adults.

Disease Agents Recovered Incidental to a Tick Survey of the Mississippi Gulf Coast1

1955 ◽  
Vol 48 (4) ◽  
pp. 396-400 ◽  
Author(s):  
Cornelius B. Philip ◽  
Jesse S. White
Keyword(s):  
Tick Survey

scholarly journals Ngari virus (Orthobunyavirus, Peribunyaviridae) in ixodid ticks collected from cattle in Guinea

2020 ◽  
Author(s):  
MT Makenov ◽  
AH Toure ◽  
RB Bayandin ◽  
AV Gladysheva ◽  
AV Shipovalov ◽  
...  
Keyword(s):  
Amblyomma Variegatum ◽  
Ixodid Ticks ◽  
Viral Rna ◽  
Severe Illness ◽  
Specific Primer ◽  
African Countries ◽  
Second Stage ◽  
Initial Stage ◽  
Vector Borne ◽  
Tick Survey

AbstractNgari virus is a mosquito-borne virus belonging to the genus Orthobunyavirus (Peribunyaviridae family). This virus is pathogenic to humans and causes severe illness. Ngari virus is present in several African countries, including Madagascar. Here, we report the detection of Ngari virus in ixodid ticks collected from cows in Guinea.A tick survey was conducted in March-November of 2018 in six regions of Guinea. The sample comprised 710 pools, with a total of 2067 ticks belonging to five species collected from 197 cows. At the initial stage, we screened a subsample of tick pools of vector-borne viruses with a multiplex genus-specific primer panel. In the second stage of the study, we narrowed the search and screened all the samples by qPCR for the detection of Ngari virus. All positive samples were sequenced with primers flanking Ngari virus-specific fragments on the S and M segments.We found Ngari virus in 12 pools that were formed from engorged ticks collected from livestock in three villages of the Kindia and Kankan regions. Sequencing of the S and M segments confirmed that the detected viruses belong to Ngari virus, and the viruses were most similar to the strain Adrar, which was isolated in Mauritania. We detected viral RNA in ticks of the following species: Amblyomma variegatum, Rhipicephalus geigyi, and Rh. (Boophilus) spp. There is no evidence that ixodid ticks are competent vectors of the Ngari virus. Most likely, the ticks obtained the virus through blood from an infected host.

scholarly journals Standardized Ixodid Tick Survey in Mainland Florida

Insects ◽  
2019 ◽  
Vol 10 (8) ◽  
pp. 235 ◽  
Author(s):  
Glass ◽  
Ganser ◽  
Wisely ◽  
Kessler
Keyword(s):  
Tick Species ◽  
Ixodes Scapularis ◽  
Survey Methods ◽  
Ixodid Tick ◽  
Dermacentor Variabilis ◽  
Amblyomma Americanum ◽  
The State ◽  
Environmental Data ◽  
Ixodid Ticks ◽  
Tick Survey

A statewide survey of questing ixodid ticks in mainland Florida was developed consistent with U.S. CDC standards to maximize the amount of epidemiologic and environmental data gathered. Survey sites were stratified by climatic zones and proportional to recognized land cover categories. A total of 560 transects on 41 sites within the state were sampled repeatedly by flagging between 2015 and 2018. Four tick species were collected; Amblyomma americanum, Amblyomma maculatum, Ixodes scapularis and Dermacentor variabilis. All species were more commonly found in northern and central regions of the state than in southern and western regions. Adult I. scapularis were active from autumn through spring and complementary to adult A. americanum and D. variabilis. Standardized survey methods help reduce sampling biases and better characterize risk from the species surveyed. However, differences in the attractiveness of collection methods for different tick species makes cross-species comparisons a continuing challenge.

scholarly journals Crimean-Congo haemorrhagic fever: a seroepidemiological and tick survey in the Sultanate of Oman

2000 ◽  
Vol 5 (2) ◽  
pp. 99-106 ◽  
Author(s):  
R. J. Williams ◽  
S. Al-Busaidy ◽  
F. R. Mehta ◽  
G. O. Maupin ◽  
K. D. Wagoner ◽  
...  
Keyword(s):  
Haemorrhagic Fever ◽  
Sultanate Of Oman ◽  
Crimean Congo Haemorrhagic Fever ◽  
Tick Survey
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