Category Archives: Canada (news)

Wildlife and environmental news from Canada

An Increase in Tick Bites and Lyme Disease in the UK

Walkers in Britain are being urged to take extra precautions against tick bites this summer because an epidemic of blood-sucking ticks is likely, following a mild, wet winter that gave them perfect breeding conditions.

The warning was delivered by Richard Wall, Professor of Zoology at Bristol University, who says there’s no definitive data on how many ticks are in the country. Some areas have none. Others – usually woodland and heath areas – may have more than 100 per square metre. However, the general consensus among rural communities is they are on the increase, largely as a result of the warmer and wetter weather (good breeding conditions) and the growing number of wild deer (ticks like living on their skin).

Dog walkers are also being advised to check their pets thoroughly as well, because ticks spread other diseases too, not just Lyme Disease.

The number of confirmed cases of Lyme disease — the most serious bacterial infection spread to humans by infected ticks — has also increased, according to Dr Tim Brooks, head of the Rare and Imported Pathogens Laboratory. He says laboratory proven cases have risen from about 200 in the late 1990s, to 1,200 last year, although the actual number of cases is probably three times that. Awareness and testing of the disease has also gone up, so the figures have to be seen in that context, he adds.

Lyme disease is treatable with antibiotics if it’s diagnosed early. But neurological problems and joint pain can develop months or years later if it’s left untreated. In the worst cases, it can be fatal.

Typical bulls-eye style of rash around a bite from a Lyme-disease carrying tick.  Source: Wikimedia Commons
Typical bull’s-eye style of rash around a bite from a Lyme-disease carrying tick. Source: Wikimedia Commons

The most common symptom is a pink or red circular “bull’s-eye” rash that develops around the area of the bite, but it doesn’t appear in everyone. Flu-like symptoms and fatigue are other noticeable signs of infection.

Eddie adds:

Before feeding on the blood of their victim, the ticks are extremely small and difficult to see.  What is grimly worse is the fact that they actually burrow into their host’s flesh and become very difficult to remove.  The best way to do so is with forceps, pulling gently, directly upwards but it is extremely imortant not to squeeze too hard and burst the tick as that may leave its mouthparts embedded and can add to the subsequent infection.

Ticks are tiny when they first bite but dig themselves into the host's flesh (which is painless) and swell as  and they suck the blood.  You will NOT feel them doing it and MUST check your body. Source: CDC and Wikimedia Commons
Ticks are tiny when they first bite but dig themselves into the host’s flesh (which is painless) and swell as and they suck the blood. You will NOT feel them doing it and MUST check your body. Source: CDC and Wikimedia Commons

The longer the tick is on its victim the larger it gets as it fills with the blood it is feeding on.  The illustration on the left shows the different life-stages.  (The American ‘dime’ coin that is used for scale is smaller than a British ‘penny’ and significantly smaller than a British ‘one pound’ coin.)

However, the good news — as established over many decades of this problem here in the USA — is that if the tick is removed within 36 hours of first attaching itself, the chance of a person getting Lyme Disease is somewhere between very low and zero, so the crucial task is checking oneself very carefully each day after being outdoors in relevant areas.

Get your partner or a family member to check your back, too, because even though some say the ticks only bite up to an adult person’s waist height, this is actually goverened by the height of the vegetation in the area.  Tall grass or brush raises the waiting insects higher and any resultant bites can therefore be higher on one’s body.  The back of one’s neck and shoulders should certainly be included if you’ve been through tall vegetation, and if you are wearing a short-sleeved top, check your armpits as well.

Ticks climb onto tall or overhanging vegetation in wait for a suitable host. They sense a suitable mammal's presence by the increase in carbod dioxide and get agitated, ready to climb onto their unwitting victim.  At this stage, the ticks are minute.  Source: Wikimedia Commons
Ticks climb onto tall or overhanging vegetation in wait for a suitable host. They sense a suitable mammal’s presence by the increase in carbon dioxide and get agitated, ready to climb onto their unwitting victim. At this stage, the ticks are minute. Source: Wikimedia Commons

Some people in the USA advocate wearing light-coloured clothing so you can see any ticks that are on the outside of such (where they are harmless) before they potentially find an opening and get inside.  Similarly, if you are in a bad area for ticks it is a good idea to tuck your trouser legs into your socks — another way to stop them getting in, even if it won’t win you any points in a fashion competition.

This is certainly a problem I take very seriously and the fact that I always wear insect-repellent shirts and trousers, from early spring until winter sets in properly, undoubtedly helps.

Are such garments available in Britain?  I don’t recall ever seeing them there.  If you are planning an outdoorsy vacation anywhere warm, I would certainly recommend you search for such clothing online as it also stops mosquitoes and other biting insects from spearing you through your shirt!

One good source is Ex Officio and the relevant page is:  http://www.exofficio.com/search/bug-repellent%20clothing but there are several other sources that I know of so just do searches for ‘bug-repellent clothing’ and ‘insect-repellent clothing’.

 Eddie Wren

 


Sources:

  • http://www.thetimes.co.uk/tto/environment/article4078667.ece
  • http://www.bbc.com/news/blogs-magazine-monitor-27255853
  • http://www.mirror.co.uk/news/uk-news/epidemic-ticks-hit-britain-summer-3484449
  • http://www.examiner.com/article/mass-health-officials-warn-residents-about-dangers-of-lyme-disease
  • http://commons.wikimedia.org/wiki/File:Bullseye_Lyme_Disease_Rash.jpg

 

 

When Catching a World-Record Fish Ends in Heartbreak

On 8th February this year, retired navy captain Rob Scott, from Minnesota caught a 4-pound Lake Trout (actually a species of char, not a trout — Salvelinus namaycush) while hand-lining through ice on Lac la Croix, on the Minnesota/Ontario border.  Shortly afterwards, he was checked by an Ontario Ministry of Natural Resources officer who recorded the fact that Rob had kept his one permitted lake trout — the Ontario provincial limit.  Ironically, if the retired captain had been just a short distance away, on the same lake, he would have still been in Minnesota and would have been allowed to keep two lake trout, and — as you will see below — on this occasion this matters.

Retired navy captain Rob Scott and his 52-pound, world-record Lake Trout. February 2014
Retired navy captain Rob Scott and his 52-pound, world-record Lake Trout. February 2014

The problem came later that day when Rob hooked a second fish, which — at 52 pounds 3 ounces — was not only a new world record for lake trout but was a mind-boggling 77 percent larger than the previous, 18-year-old record of 29 pounds 6 ounces!

According to the book ‘Freshwater Gamefish of North America’, by Peter Thompson, the average weight of a lake trout is just 4-10 pounds, so at 52 pounds he probably thought he’d hooked a stray submarine!  In lake trout terms, it was a behemoth.

All went well until the same  Ontario Ministry of Natural Resources officer who had checked the 4-pound fish saw a subsequent newspaper report about the enormous laker, and regrettably this started an official ball rolling.  As a result, a Minnesota Department of Natural Resources officer confiscated the record-breaking fish from a Duluth taxidermist, and it was then destined to be handed over to Ontario officials.

As a retired police officer myself, I am very aware that rules are rules, and all that sort of stuff, but I really would like to ask Ontario officials just what they think they have actually achieved on this occasion, other than perhaps leaving a bad taste in the mouths of a lot of people.  Of course conservation is crucial, and the majority of fishehrmen I know and fish with would be the first to agree with that belief but in my own opinion, this time around, the Ontario people have scored a PR ‘own goal’ and have little, if anything, to actually be proud of.

Eddie Wren