Studies show high microfilaria
occurrence rates in wild animals, particularly those from the Northern region of Brazil.
Mature adult heartworms then begin producing microfilaria
that, in the dog, are commonly found circulating in the bloodstream, where they can be ingested by a mosquito during a blood meal, thereby making that mosquito a vector for transmission of heartworms to other animals.
During the follow-up appointment in NUH in June 2013, the patient was asymptomatic and a thick blood film was prepared and found negative for malaria but unexpectedly showed the presence of several microfilaria
. Intrigued and surprised by this finding and also uncertain about the morphological features to identify this parasite, the hospital laboratory staffs sent the thick film and residual of whole EDTA blood to the MRC-NPHL.
. As pneumonia healed and pleural effusion resorbed after albendazole treatment, the pulmonary localization of M.
Depending on whether microfilaria
can be detected in the peripheral blood, patients are described as microfilaraemic or amicrofilareamic.
loa larvae due to their shorter durations of stay in endemic regions compared to natives; manifest a lower parasite burden than natives; and mount a heightened immune response to migrating adult worms that may limit female microfilaria
One case report previously showed microfilaria
in the bone marrow aspirate of a young boy who presented with pancytopenia. The presentation in this boy was gum bleeding, much alike our case.
One unidentified species of microfilaria
was reported from the blood of Ardeola grayii (Indian Pond Heron).
A study was carried out in Imo River Basin, Imo State, Southeastern Nigeria, to assess the prevalence and intensity of microfilaria
of Onchocerca volvulus in the area .
All 5 cases of filariasis showed microfilaria
along with mild to severe mixed inflammatory response (Figure 6) while one case also showed gravid adult filarial worm in cytology (Figure 7).
In 2000, WHO called for the elimination of LF by 2020, based on a strategy of annual MDA with drugs that clear microfilaria
, the circulating stage of the parasite in humans (3).
The first dog checked had frightening (under the microscope) undulating microfilaria
concentrated in the buffy coat region.