What Makes Ticks Tick? Climate Change, Ticks, and Tick‐Borne Diseases

Süß, Jochen; Klaus, Christine; Gerstengarbe, Friedrich‐Wilhelm; Werner, P.

doi:10.1111/j.1708-8305.2007.00176.x

Cited by 124 publications

(82 citation statements)

References 23 publications

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“…The progression of tickborne diseases and their increased morbidity is associated with outdoor activities and travels (Parola, 2004). Several climate models predict a global warming, more in the northern and altitude range, such as in Germany, with the emergence of Lyme diseases and tickborne encephalitis in the last years (Suss et al, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…There are several factors in the emergence of tickborne diseases, and among these may be climate change (Parola & Raoult, 2001a). It has been suggested that global warming has led to a northward expansion of several tick species, including Ixodes ricinus, the vector of Lyme disease in Europe, and Rhipicephalus sanguineus, the vector of Mediterranean spotted fever (MSF) (Suss et al, 2008;Estrada-Pena & Venzal, 2007). However, the impact of climate change on tick-borne diseases remains a topic of much debate in the scientific literature (Suss et al, 2008;Randolph, 2004).…”

Section: Résumé : Actualité Sur Les Maladies Bactériennes Transmises mentioning

confidence: 99%

“…It has been suggested that global warming has led to a northward expansion of several tick species, including Ixodes ricinus, the vector of Lyme disease in Europe, and Rhipicephalus sanguineus, the vector of Mediterranean spotted fever (MSF) (Suss et al, 2008;Estrada-Pena & Venzal, 2007). However, the impact of climate change on tick-borne diseases remains a topic of much debate in the scientific literature (Suss et al, 2008;Randolph, 2004). In this review, we describe the bacterial tick-borne diseases in European countries, focusing on the epidemiological and clinical aspects of tick-borne rickettsioses, with overviews of other tick-borne diseases.…”

Section: Résumé : Actualité Sur Les Maladies Bactériennes Transmises mentioning

confidence: 99%

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Update on tick-borne bacterial diseases in Europe

et al. 2009

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Summary :In recent years, the prevalence of tick-borne bacterial diseases has significantly increased in European countries. The emergence and reemergence of these illnesses are attributed to changes in the environment and human behavior. Several diseases are caused by bacteria initially isolated from ticks and subsequently considered pathogenic. It is necessary to consider the bacteria found in arthropods capable of biting humans as potential human pathogens. Here we review the clinical and epidemiological data on bacterial tick-borne diseases in European countries. We focus on the epidemiological and clinical aspects of tick-borne rickettsioses and give an overview of other tick-borne illnesses as well as the emergence and re-emergence of these diseases. Résumé : ACTUALITÉ SUR LES MALADIES BACTÉRIENNES TRANSMISES PAR

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Section: Resultsmentioning

confidence: 99%

Section: Résumé : Actualité Sur Les Maladies Bactériennes Transmises mentioning

confidence: 99%

Section: Résumé : Actualité Sur Les Maladies Bactériennes Transmises mentioning

confidence: 99%

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Update on tick-borne bacterial diseases in Europe

et al. 2009

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“…The most common birds were blackcaps, S. atricapilla, and common whitethroats, Sylvia communis, which accounted for 18% and 17%, respectively. The mean number of ticks per bird was 0.4, which is significantly less than findings from a lower-altitude (Certak) location and corresponds to the altitude-dependent tick density (9).…”

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confidence: 83%

Synanthropic Birds Influence the Distribution of Borrelia Species: Analysis of Ixodes ricinus Ticks Feeding on Passerine Birds

Dubská

Literák

Kocianová

et al. 2011

Appl Environ Microbiol

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Ixodes ricinus ticks collected from 835 birds and from vegetation in the Czech Republic were analyzed. Host-seeking ticks (n ‫؍‬ 427) were infected predominantly by Borrelia afzelii (25%). Ticks (n ‫؍‬ 1,012) from songbirds (Passeriformes) were infected commonly by Borrelia garinii (12.1%) and Borrelia valaisiana (13.4%). Juveniles of synanthropic birds, Eurasian blackbirds (Turdus merula) and song thrushes (Turdus philomelos), were major reservoir hosts of B. garinii.In central Europe, including the Czech Republic, the main vector of Lyme disease spirochetes is the Ixodes ricinus tick, feeding on a wide range of vertebrate hosts (7). The role of birds as reservoir hosts of Borrelia spirochetes, mainly B. garinii, has been elucidated in recent years (1, 10). In 2009, based on data acquired during the postbreeding period, we presented a study suggesting a differential role of passerine birds in distribution of Borrelia spirochetes (2). Here we show data acquired from I. ricinus ticks feeding on birds during the spring migration and/or breeding period at the same location. We compare and synthesize our data from both spring and postbreeding periods, together with 2-year data from host-seeking ticks from the same area and with data from 2 years' collection of ticks from birds in a higher-altitude area of the Czech Republic.Bird infestation by ticks was lower in the spring period than in the postbreeding period. Spring collection at location Certak (370 to 400 m above sea level [ASL], 49°34ЈN, 17°59ЈE) (5) was conducted from 31 March to 28 April 2007. Birds were collected with mist nets and then identified, examined, and released after the ticks were removed with tweezers. Hostseeking ticks were collected by blanket dragging. Ticks were placed in 70% ethanol and later in the laboratory were classified according to the species, stage, sex of adults, and blood meal volume as "unfed," "half fed," or "fully fed." All procedures were performed identically to those described in our previous study (2). During spring, the total number of birds captured, including retrapped events, was 835 ( Fig. 1; see also Table S1 in the supplemental material). Passerine birds (Passeriformes) represented 99.3% (0.7% belonged to Piciformes). The most common birds were European robins, Erithacus rubecula (39%), and blackcaps, Sylvia atricapilla (15%). The overall infestation of birds with ticks was lower in the spring than in the postbreeding period (2), the average number of ticks per bird was 2.1 in the postbreeding period and 1.2 in the spring, and the mean number of ticks per infested bird was 5.1 in the postbreeding period (2) ). Generally, ground-foraging species have higher numbers of ticks overall, and the association between foraging behavior and tick infestation was more pronounced in the postbreeding period. There were 1,012 ticks identified as I. ricinus, 1 fed larva of Haemaphysalis concinna, and 3 nymphs of Ixodes arboricola. The proportions of I. ricinus larvae and nymphs were 38% and 61%, respectively, with 2 adult females ...

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“…Otro factor importante es la capacidad de drenaje del suelo, la tendencia del terreno a una inundación puede ser un limitante para el crecimiento de las poblaciones parasitarias (18). En el estudio de Adejinmi (21), se concluyó que las garrapatas hembras expuestas a largos periodos de inmersión en agua reducen su capacidad reproductiva y cuando las precipitaciones están acompañadas de temperaturas menores a 14ºC, se altera la capacidad de ovoposición de las garrapatas (22). No obstante, la lluvia es importante para la taurus breeds, which show greater granulocytic reaction to tick infestations (15), making the Lucerna animals susceptible to this ectoparasite.…”

Section: Relación Entre Algunos Factores Abióticos Y La Carga Parasitunclassified

Tick loads in Bos taurus cattle grazing in two contrasting production systems

Rosales

P³

2016

Rev MVZ Córdoba

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Objectives. To relate the effect of biotic and abiotic factors on Rhipicephalus (Boophilus) microplus tick loads on cows grazing either in intensive silvopastoral systems (ISS) (Lucerna) or in grass pastures associated with sugarcane plantations (La Isabela). Materials and methods. Tick counts were performed on 27 Lucerne breed animals that were in different physiological states, six of which were grazing on forage grass paddocks associated with commercial sugarcane plantations and the remaining animals grazed in an ISS based on Leucaena leucocephala and Cynodon plectostachyus. The tick counts were made every 15 days. The data of temperature, humidity, and radiation were taken from a weather station that was inside the ISS. Results. There was a weak relationship between saturation deficit and tick load (R 2 =0.34) and another between UV radiation and tick load (R 2 =0.205) for animals grazing in ISS. There were differences in tick counts when comparing animals of similar productivity from both systems evaluated: in La Isabela (sugarcane grass paddocks) average counts were 311 ticks perceptible to the touch (TPT) and in Lucerna (ISS farm) average counts were 206 TPT (p= 0.02). Additionally, there were greater tick counts in high productivity cows compared to low productivity cows. Conclusions. The abiotic and biotic factors of the ecosystem and animal productivity can affect the TPT counts. In ISS systems, tick counts can be lower than those observed in monoculture grazing systems.Key words: Ectoparasites, microclimate, radiation, saturation deficit (Source: CAB). RESUMENObjetivos. Relacionar el efecto de algunos factores bioticos y abioticos sobre las cargas de la garrapata Rhipicephalus (Boophilus) microplus en hembras bovinas que pastorean en sistemas silvopastoriles intensivos (SSPi)(Lucerna) y en monocultivos asociados a cañaduzales (La Isabela). Materiales y métodos. Se realizaron conteos en 27 animales de raza Lucerna en diferentes estados fisiológicos, seis de los cuales se encontraban pastoreando en lotes de gramíneas forrajeras asociados con plantaciones de caña comerciales y los animales restantes pastoreaban en SSPi basados en Leucaena leucocephala y Cynodon plectostachyus. El conteo de garrapatas se efectuó cada 15 días. Los datos de temperatura, humedad y radiación se tomaron de una estación meteorológica que se encontraba en el interior del SSPi. Resultados. Se encontró una relación débil entre el déficit de saturación y los conteos de garrapatas (R 2 =0.34) y entre la radiación UV y los conteos de garrapatas (R 2 =0.205) Rev.MVZ Córdoba 21(2):5404-5415, 2016. ISSN: 0122-0268 ORIGINAL 5405 para los bovinos pastoreando en SSPi. Hubo diferencia entre los conteos en animales con similar productividad en ambos sistemas evaluados; siendo el promedio total de garrapatas perceptibles al tacto (GPT) de 311 para La Isabela y de 206 GPT para Lucerna (p=0.02). Hubo mayor número de GPT en hembras con mayor productividad en comparación con las de baja productividad (p<0.05). Conclusiones. Los factores b...

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What Makes Ticks Tick? Climate Change, Ticks, and Tick‐Borne Diseases

Cited by 124 publications

References 23 publications

Update on tick-borne bacterial diseases in Europe

Update on tick-borne bacterial diseases in Europe

Synanthropic Birds Influence the Distribution of Borrelia Species: Analysis of Ixodes ricinus Ticks Feeding on Passerine Birds

Tick loads in Bos taurus cattle grazing in two contrasting production systems

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