Babesiosis

18.4.2019, 15 403 přečtení, 3 komentář Disease Babesiosis

Babesiosis is transmitted by ticks. The disease causative agent is a protozoan from the genus Babesia, usually Babesia divergens or Babesia microti. The protozoans infect red blood cells, and feed and procreate inside them. Babesiosis frequently accompanies a borreliosis infection. It usually only affects the elderly. If susceptible patients (elderly, immunologically deficient individuals) are not treated, the death rate can climb up to 50%.

Life cycle of Babesia

The complete life cycle of Babesiosis is depicted in the picture below.

 

         I.            The cycle begins with an infected tick sucking on mice.

       II.            Sporozoites infiltrate red blood cells, where they reproduce asexually and create male and female gametes.

     III.            The gametes are sucked through the blood in another tick, in which they merge and give rise to zygotes (through sexual reproduction).These infiltrate the salivary glands of the tick, where they produce more sporozoites. 

     IV.            The tick sucks on human blood, the sporozoites infiltrate human red blood cells and procreate, causing Babesiosis. In the human host the parasitic life cycle ends. Human-to-human transmission is only possible through blood transfusion.

babesia_lifecycle.gif

Symptoms of the disease

Babesiosis can occur without any serious symptoms, or as a dangerous disease with malaria-like symptoms: fatigue, loss of appetite, joint pain and muscle soreness, depression, cough and dyspnea. Regular symptoms include fever, liver enlargement, muscle soreness, shivers and jaundice. Multiple infections with another disease, most commonly with Lyme disease, are relatively frequent. It that case, the disease progression becomes much more serious. More information about multiinfection in another article.

Treatment

Babesiosis is easily curable. First-choice drugs are clindamycin and quinine, or alternatively azithromycin and atovaquone.

 

Overview of infected tick incidence

Prevalence of pathogens in ticks were assembled based on ticks analyzed in Protean s.r.o. laboratories.

prevalence of pathogens in ticks

 

Links:

Koinfekce boreliózy a babesiózy v USA

P?íznaky koinfekce babesiózy v praxi - Suzy Cohen

Epidemiologie babesiózy - prezentace

Wikiskripta - Babesia (?esky)

SZÚ - Nemoci p?enášené klíš?aty

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