The relationship between the Southern Oscillation Index, rainfall and the occurrence of canine tick paralysis, feline tick paralysis and canine parvovirus in Australia

Rika-Heke, Tamara; Kelman, Mark; Ward, Michael P.

doi:10.1016/j.tvjl.2015.03.012

Cited by 16 publications

(22 citation statements)

References 21 publications

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“…We found an association between areas of lower rainfall (annual, highest daily or highest monthly) and higher occurrence of CPV-reporting hospitals. This strengthens the findings of a previous Australian study (Rika-Heke et al, 2015) that found a significant negative crosscorrelation between parvovirus occurrence and rainfall 4-6 months previously, suggesting that an extended dry period resulted in more cases. Taken together, these results suggest that periods of reduced rainfall might contribute to environmental persistence of CPV, increasing the risk of exposure of an individual.…”

Section: Tablesupporting

confidence: 90%

“…The canine breeding cycle, with more puppies born in spring and summer, might explain one aspect of seasonal disease occurrence. Horner, 1983;Houston et al, 1996;Kalli et al, 2010;Rika-Heke et al, 2015). Epidemiological studies have been limited until recently by a lack of reliable and suitable data, and an absence of national representative data (Brady et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Socioeconomic, geographic and climatic risk factors for canine parvovirus infection and euthanasia in Australia

Kelman

Barrs

Norris

et al. 2020

Preventive Veterinary Medicine

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A B S T R A C TInfection of canids with canine parvovirus (CPV) can result in severe, often fatal disease. This study aimed to examine climatic, socioeconomic and geographic risk factors for CPV infection and CPV-associated euthanasia in Australia. Australian veterinary hospital responses (534; 23.5 %) to a national veterinary survey of CPV case occurrences and euthanasias in 2016 were used. Severe caseloads (> 40 cases per annum) were reported by 26 (11 %) hospitals (median 60 cases; IQR 50-110). Case reporting, case numbers, and without-treatment euthanasia were significantly associated with disadvantage across all Socio-Economic Index for Areas quintiles (p < 0.0001) -the greater the disadvantage, the more reports. Strong negative correlations were found between case numbers and the Index of Relative Socioeconomic Disadvantage (r SP = -0.3357, p < 0.0001) and also between euthanasia and the Index of Education and Occupation (r SP = -0.3762, p < 0.0001). Hospitals in more remote areas were also more likely to report cases and to euthanize without treatment (p < 0.0001). Of the climate variables, temperature of the hottest month was most strongly positively correlated with case numbers (r SP = 0.421, p < 0.0001), and lower annual rainfall was associated with more case-reporting hospitals (p < 0.0001). These results confirm that socioeconomic disadvantage is a significant risk-factor for CPV infection and outcome, and high temperature may also contribute to risk.

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Section: Tablesupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Socioeconomic, geographic and climatic risk factors for canine parvovirus infection and euthanasia in Australia

Kelman

Barrs

Norris

et al. 2020

Preventive Veterinary Medicine

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“…September-October in QLD vs October-November in NSW). The gap of one month that we report here between QLD and NSW could partly be explained by a temporal lag in optimal weather and environmental conditions for the proliferation of ticks between the two states [ 2 , 23 , 24 ].…”

Section: Discussionmentioning

confidence: 98%

Use of big data in the surveillance of veterinary diseases: early detection of tick paralysis in companion animals

et al. 2016

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BackgroundTick paralysis, resultant from envenomation by the scrub-tick Ixodes holocyclus, is a serious threat for small companion animals in the eastern coast of Australia. We hypothesise that surveillance systems that are built on Internet search queries may provide a more timely indication of high-risk periods more effectively than current approaches.MethodsMonthly tick paralysis notifications in dogs and cats across Australia and the states of Queensland (QLD) and New South Wales (NSW) were retrieved from Disease WatchDog surveillance system for the period 2011–2013. Internet search terms related to tick paralysis in small companion animals were identified using Google Correlate, and corresponding search frequency metrics were downloaded from Google Trends. Spearman’s rank correlations and time series cross correlations were performed to assess which Google search terms lead or are synchronous with tick paralysis notifications.ResultsMetrics data were available for 24 relevant search terms at national level, 16 for QLD and 18 for NSW, and they were all significantly correlated with tick paralysis notifications (P < 0.05). Among those terms, 70.8, 56.3 and 50 % showed strong Spearman’s correlations, at national level, for QLD, and for NSW respectively, and cross correlation analyses identified searches which lead notifications at national or state levels.ConclusionThis study demonstrates that Internet search metrics can be used to monitor the occurrence of tick paralysis in companion animals, which would facilitate early detection of high-risk periods for tick paralysis cases. This study constitutes the first application of the rapidly emerging field of Internet-based surveillance to veterinary science.

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“…Previous studies have debated the correlation between climate factors and transmission of infectious diseases around the world (Patz et al, 1996;Altizer et al, 2006;Zhang et al, 2010;McCormick et al, 2013;Lee et al, 2015;Rika-Heke et al, 2015), including in many areas of China (Zhang et al, 2007a;Zhang et al, 2007b;Guan et al, 2008;Huang et al, 2011;Shen et al, 2015). Outbreaks of avian cholera are known to be frequently correlated with intensive poultry production, climate stress and possible predation in free range flocks (Elfaki et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…A given large-scale climate index may represent a better representation of climate effects than any single local weather variable (for example, a single temperature or rainfall figure) (Stenseth et al, 2003). Several human and animal infectious disease outbreaks have been shown to be influenced by the climate changes associated with the ENSO phenomenon including cholera (Pascual et al, 2000;Koelle et al, 2005), dengue (Johansson et al, 2009;Thai et al, 2010;Earnest et al, 2012), canine parvovirus (Rika-Heke et al, 2015) and rift valley fever (Anyamba et al, 2010). Previous studies have found that El Niño climate events can cause P. multocida to flourish (Traill et al, 2009), and the findings of the present study are consistent with the results of these prior studies.…”

Section: Discussionmentioning

confidence: 99%

Climate Variability and Avian Cholera Transmission in Guangxi, China

Qin

et al. 2017

Rev. Bras. Cienc. Avic.

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In recent years, Guangxi has become one of the most severely affected provinces by epidemics of avian cholera in China. To date, the major determinant climatic factors of the disease in the region have remained largely unknown, making it difficult to effectively target countermeasures for avian cholera surveillance and control. This study aimed to quantify the relationship between climatic variables and cases of avian cholera in subtropical areas of China. Data relating to local meteorological variables and notified cases of avian cholera were supplied by the relevant authorities between January 2006 and December 2015. Spearman correlation, co-linearity statistics and crosscorrelation analysis were applied to the data, controlling for co-linearity and lag effects. A time-series Poisson regression analysis was conducted to examine the degree of correlation between the climate variables and avian cholera transmission. The results indicated that monthly mean temperature, relative humidity, rainfall and the multivariate El Niño Southern Oscillation Index, with 2-3 months lag, were correlated with avian cholera incidence. The final model had good predictive ability for the occurrence of avian cholera. Overall, the findings indicate that climate variability plays an important role in avian cholera transmission in Guangxi province. Adoption of the model presented in this study could usefully inform avian cholera surveillance strategies, making them significantly simpler and more effective. The model could also serve as a decision support tool for veterinary professionals and health authorities.

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The relationship between the Southern Oscillation Index, rainfall and the occurrence of canine tick paralysis, feline tick paralysis and canine parvovirus in Australia

Cited by 16 publications

References 21 publications

Socioeconomic, geographic and climatic risk factors for canine parvovirus infection and euthanasia in Australia

Socioeconomic, geographic and climatic risk factors for canine parvovirus infection and euthanasia in Australia

Use of big data in the surveillance of veterinary diseases: early detection of tick paralysis in companion animals

Climate Variability and Avian Cholera Transmission in Guangxi, China

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