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Subject: [redesastres-l] Borrelia burgdorferi, Babesia microti, Anaplasma phagocytophilum - USA: (CT) incr. tick infection
Date: Wed, 24 Feb 2016 13:10:30 -0500
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 BORRELIA BURGDORFERI, BABESIA MICROTI, ANAPLASMA PHAGOCYTOPHILUM -
USA: (CONNECTICUT) INCREASED INFECTION IN TICKS
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A ProMED-mail post
<http://www.promedmail.org>
ProMED-mail is a program of the
International Society for Infectious Diseases
<http://www.isid.org>
Date: Mon 22 Feb 2016
Source: The Day [edited]
<http://www.theday.com/statenortheast/20160222/tests-show-more-ticks-carrying-lyme-disease-bacteria>
Thirty-one percent of blacklegged ticks submitted to the Tick Testing
Laboratory at the Connecticut Agricultural Experiment Station tested
positive for the bacterium that causes Lyme disease, _Borrelia
burgdorferi_.
The experiment station said [Mon 22 Feb 2016] that this is an increase
of nearly 6 percent from an average of 26 percent over the last 5
years of testing from 2010 to 2014. This is the statewide average for
more than 2400 ticks tested from the state's 8 counties.
In New London County, 33 percent of ticks tested carried the Lyme
disease bacteria, the experiment station said in a news release.
Last year [2015], the tick testing program, begun in 1990, was
expanded to test for 2 emerging pathogens carried by ticks: _Babesia
microti_, the agent for babesiosis; and anaplasmosis [_Anaplasma
phagocytophilum_], which causes anaplasmosis. Statewide, 11 percent of
ticks tested carried the babesiosis parasite, while 4.9 percent
carried the anaplasmosis bacteria. About 8.5 percent of the ticks
tested from New London County carried the babesiosis parasite, and 5.1
percent carried anaplasmosis bacteria.
The experiment station said some ticks tested positive for 2 or all 3
pathogens, carrying an increased risk to human health.
"The tick testing results highlight the growing risk of existing and
emerging human infection with tick-associated diseases throughout the
state and the importance of taking precautionary measures to avoid
tick bites," Theodore Andreadis, director of the experiment station,
said.
Overall, more than 40 percent of all the ticks tested are infected
with at least one of the agents capable of causing human infection,
the experiment station said.
> From 2010 to 2014, there were 13 983 human cases of Lyme disease
reported in Connecticut, and 659 cases of babesiosis, and 286 cases of
anaplasmosis were reported in the state, the experiment station said.
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[The news report above does not say whether the ticks examined were
nymph or adult. The risk of human illness after being bitten is
highest for an infected nymph seeking a blood meal, rather than an
adult tick, because adult ticks are much larger and may more likely be
removed before they have had time to transmit the organism. The
prevalence of _Borrelia burgdorferi_ in nymphal _Ixodes scapularis_
ticks commonly ranges between 20 percent and 40 percent in areas of
endemicity in the Northeastern and upper Midwestern United States
(<http://cid.oxfordjournals.org/content/43/9/1089.full>). The
prevalence of coinfection in nymphal _Ixodes scapularis_ ticks with
_Borrelia burgdorferi_, _Babesia microti_, or _Anaplasma
phagocytophilum_ has been discussed in prior ProMED-mail post (Lyme
disease - USA (03): (NY) B. burgdorferi, B. microti coinfection in
ticks http://promedmail.org/post/20140625.2563150, Lyme disease - USA
(03): (NY) B. burgdorferi, B. microti coinfection in ticks
http://promedmail.org/post/20140625.2563150, Lyme disease - Canada
(02): (ON) B. burgdorferi prevalence in ticks
http://promedmail.org/post/20140509.2461398, and Lyme disease - UK:
Borrelia positive ticks http://promedmail.org/post/20120128.1024838).
Connecticut, with an estimated population of almost 3.6 million
inhabitants in 2015, is the southernmost state in the New England
region (<https://en.wikipedia.org/wiki/Connecticut>). It is south of
Massachusetts, east of New York, and north of the Long Island Sound. -
Mod.ML
A HealthMap/ProMED-mail map can be accessed at:
<http://healthmap.org/promed/p/210>.]
[See Also:
2014
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Tick-borne diseases - USA: (MA) Lyme dis., miyamotoi, anaplasmosis,
babesiosis http://promedmail.org/post/20140826.2723555
Lyme disease - USA (03): (NY) B. burgdorferi, B. microti coinfection
in ticks http://promedmail.org/post/20140625.2563150
Lyme disease - Canada (02): (ON) B. burgdorferi prevalence in ticks
http://promedmail.org/post/20140509.2461398
2012
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Lyme disease - UK: Borrelia positive ticks
http://promedmail.org/post/20120128.1024838]
January 18, 2021. Centro Nacional de Sanidad Agropecuaria, webmaster@censa.edu.cu .