Human Granulocytic<unk> (HGA) is a disease caused by an intraneutrophilic rickettsial parasite of ruminants, Anaplasma phagocytophilum previously known by other names, Ehrlichia'' equi and Ehrlichia phagocytophilum.  It is an emerging cause of tick-borne illness in the USA and Europe. The organism infects granulocytes and is transmitted by a number of hematophagous species of ticks most commonly by black-legged deer tick Ixodes scapularis and Ixodes pacificus. HGA is considered as a zoonotic disease. The disease has a variable presentation in humans, but also often present as a subclinical illness with mild symptoms of fever, myalgia, and malaise. These common symptoms make it difficult to definitively diagnose HGA. Although it present as a mild illness sometimes it leads to hospitalization in 36%, the ICU admission in 7%, and death in 0.6% of cases. This disease can be cured with antimicrobial agent doxycycline, however, minority of  patients can have debilitating illness despite antibiotic therapy.
Anaplasmosis
Tungiasis
Helminthiasis
Trichiasis
Trichinosis
Microsporidiosis
Trichomoniasis
Chancroid