Zamoření bytu štěnicemi - pozor na histamin
Pokud štěnice napadnou váš byt, čeká vás nelehký úkol jak se jich zbavit.
Štěnice domácí se množí velmi rychle, ve dne je prakticky neaktivní, v noci když lidé a domácí zvířata spí se vydávají na "výpravu" za krví.
Má se za to, že některé druhy štěnic by mohly přenášet např. bakterii Trypanosoma cruzi (původce Chagasovy choroby) případně bakterii Bartonella quintana (původce tzv. Zákopové horečky). Toto tvrzení se ovšem laboratorně nepotvrzuje.
Kousnutí a následné sání krve od štěnice ovšem způobuje různé závažné dermatitidy (kožní onemocnění) v reakci na přítomnost proteinu nitroforin ve slinách štěnic, který zabraňuje krevním destičkám ve srážení krve.
Některé studie tohoto nepříjemného parazita nyní ukazují na další problém, který vzniká po zamoření obydlí štěnicemi.
Vědci zjistili, že trus štěnic, který se běžně, při jejich výskytu, objevuje na místech, kde štěnice sají krev, nebo se zdržují, obsahuje velké množství hormonu (protein) histamin.
Histamin je u citlivých jedinců spouštěč nejrůznějších akutních zánětlivých reakcí jako je např. kopřivka, bušení srdce, průjem, anafylaktický šok, respirační potíže apod.
Vědci učinili pokus a na vzorku bytů z nichž některé byly zamořeny štěnicemi, jiné nezamořeny odebrali vzorky prachu v místnostech. Tyto vzorky potom testovali na zvýšenou přítomnost histaminu.
Výsledkem jejich zkoumání bylo, že byty, v kterých se štěnice nevyskytovaly obsahovaly stopové množství histaminu, pro člověka nepostřehnutelné.
V bytech, kde se štěnice vyskytovaly byly nameřeny hodnoty histaminu v průměru více než 54 μg/100 mg prachu. Toto množství je srovnatelné s uvádením množstvím histaminu v kysaném zelí, které se nedoporučuje při histaminové intoleranci konzumovat.
Vzorky prachu použité jako vzorek byly jemně prosáté a dá se tedy říct, že histamin se vyskytuje v tak jemné podobě, že jde prakticky o poletavý prach, který je velmi snadné vdechovat.
Na závěr vědci upozornili na fakt, že histamin se v této koncentraci v bytech vyskytoval i po dezinsekci prováděné vysokou teplotou - nad 50°C. Ani to nevedlo ke snížení jeho množství. Další poměrně důležitá věc je, že histamin je velmi stálý a ani po měsících nedochází k jeho degradaci.
zdroj:DeVries ZC, Santangelo RG, Barbarin AM, Schal C (2018) Histamin jako emergentní vnitřní kontaminant: Akumulace a perzistence v domácnostech zamořených štěnicemi. PLoS ONE 13(2): e0192462. https://doi.org/10.1371/journal.pone.0192462
Komentáře
Anonym (bez ověření)
26. March 2025 - 19:05
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If you don’t have access to a
If you don’t have access to a cable machine, you can also do face pulls using a barbell.
Utilizing a barbell does put your palms are in a fixed position, so it’s not quite
as joint-friendly as cable face pulls accomplished
with a rope. But if you are in a place to do the train without ache in your wrists or shoulders, it’s definitely a viable choice.
In fact, the snatch grip (a extensive grip on the barbell)
has been shown to extend the exercise of the delts and traps, whereas reducing the activity
of the biceps. If you’re seeking to maximize
the involvement of your delts and traps, then this train could be a solid alternative as a substitute for the upright row.
While performing the upright row, the lifter’s arms journey away from their physique, and their shoulder blades carry upward near the movement's high.
I firmly imagine there are not any "bad" workout routines,
simply carried out poorly.
Nevertheless, due to their affiliation with damage, they’re not suitable for everybody.
The most transferable substitute for upright rows with much less stress on the shoulder joints is the standing rope upright row.
It works precisely the identical muscular tissues and joints whereas
giving the shoulders extra freedom. There are also different
exercises that can individually isolate the
lateral delts (e.g. lateral raises) and upper traps (e.g.
barbell shrugs). Learning the method to do upright rows appropriately is essential for maximizing its
benefits and minimizing the chance of damage. This exercise, usually
ignored, targets your higher again, shoulders, and biceps,
contributing to a well-rounded physique and enhanced power.
They are nice for constructing arm muscles and enhancing grip strength.
The underhand grip usually used on the excessive row machine is parallel with the physique, making the excessive pull motion on par with a bicep curl.
High rows and chin-ups are probably the most underrated bicep workouts in fitness.
Following these factors will help you keep proper form and technique in the course of the barbell upright row, which will guarantee an efficient and safe exercise.
The barbell upright row is probably one of the best workouts to build a stronger and greater shoulder and upper back.
I’m Avi Silverberg and that is the place where my pals and I nerd out about powerlifting technique.
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Due to the dumbbell excessive pull being a bit more complex and probably explosive,
you might have a few options on tips on how to program your reps
and sets. That said, the rhomboids additionally help in retracting the
scapulae (shoulder blades) on the prime of the train as you drive your elbows up
and again. What should you may take your personal coaching profession to the next level?
What you want is a choice of different workout routines that present an analogous level of again, entice and bicep stimulation because the
seated cable row. Like a lateral raise, an upright row could be done with dumbbells,
kettlebells, or comparable weights. Lateral raises and upright rows are
both great workouts for your shoulders. That doesn't suggest that the 2 exercises will
produce similar results, although. There are two situations if you shouldn’t perform upright rows;
when you’re performing them with unhealthy technique, and
when you might have shoulder issues. Performing upright rows underneath these circumstances are going to extend your threat of injuring your shoulder girdle.
The other upright row options are greatest skilled for muscular endurance, hypertrophy, and shoring-up weakness.
Train these actions after your huge energy movement for the
day as a half of your accent train routine. I assume a few of the greatest upright row alternate options are when the mounted barbell is
faraway from the equation. This can allow for extra exterior shoulder rotation for the reason that barbell is
not going to limit your vary of movement. The lateral increase, seated
snatch, or face pull are choices to think about.
Due to the only arm power snatch being an explosive train, you have a couple of options on the means to
program your reps and units. A common mistake within the barbell
excessive pull is when lifters permit the barbell to float too far in entrance of
them. Allowing this to occur would possibly throw you off stability and cause you to stumble.
The barbell excessive pull is a unbelievable substitute for the upright row, as it very
closely resembles the upright row and makes use of all the identical muscle teams.
This is normally what causes discomfort or what can lead to shoulder ache.
It just isn't the case all of the time, but an extreme amount of internal
rotation in a fixed place (caused by a barbell or related piece of equipment) isn’t always perfect.
Upright row alternatives also benefit by focusing on similar
muscle teams while minimizing damage danger. Bent-over lateral raises are another
wonderful alternative to the upright row. This train targets
the upper again and shoulders whereas additionally working
the rear delts, making it an excellent choice for building general higher physique energy.
Focus on proper type, use applicable weights, and progressively problem your self to attain optimum shoulder features.
Face pulls are probably the greatest exercises for concentrating on the rear deltoids and upper again muscular tissues.
This train also improves shoulder mobility, posture, and rotator cuff well being,
making it essential for creating a balanced shoulder routine.
Face pulls are particularly effective at countering the ahead shoulder posture that can end result
from overtraining the anterior delts with out enough work on the rear
delts. Upright row options are helpful for newbies who have to simplify and modify workouts to avoid
accidents.
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