Microfilaria - Wikipedia
In most tissue-dwelling species the eggs hatch in the uterus of the female, and the unsheathed microfilariae are released. In most blood-dwelling species, embryonated eggs (or, microfilariae which are said to be sheathed in the envelope of the egg) are released; and they will only exsheath ("hatch") after being ingested by the arthropod ...
Diagnostic Identification and Differentiation of Microfilariae
2019年9月24日 · On blood films processed in a proper and timely manner, W. bancrofti, Brugia spp., and L. loa may possess a sheath, while Mansonella spp. are intrinsically unsheathed. If there is a substantial delay in processing, the sheathed species may shed their sheaths, and the sheaths may not be visible via microscopy; therefore, the absence of a sheath ...
CDC - DPDx - Lymphatic Filariasis - Centers for Disease Control …
The microfilariae of Wuchereria bancrofti are sheathed and measure 240—300 µm in stained blood smears and 275—320 µm in 2% formalin. They have a gently curved body, and a tail that is tapered to a point.
Classification of Microfilaria | PDF - SlideShare
2014年9月23日 · The infective larvae enter through the wound and migrate to the peripheral lymphatics where they grow to mature male and female worms. They can live there for several years. After mating, the gravid females release sheathed microfilariae into the peripheral blood where they can be detected 8-12 months after the initial infected bite.
THE NIGHT TRAVELLER– MICROFILARIA IN PERIPHERAL BLOOD …
2018年8月7日 · Microfilariae of B. malayi are sheathed like W. bancrofti, and have a very similar shape. However, the nuclei extend nearly to the tip of the tail, a characteristic not shared with W. bancrofti. The only unequivocal means of ascertaining active filarial infection is by demonstrating parasites in host tissue.
Diagnostic Identification and Differentiation of Microfilariae
2019年9月24日 · We present here a review of the primary filarial nematodes causing human infection, including an illustrated key, which we hope will improve the diagnostic capabilities of hematologists,...
sheath, which could result in the misidentification of a normally sheathed species, such as those of Mansonella. Thick blood films allow for greater sensitivity due to the higher concentration of blood elements, and unlike with Plasmodium species, identification of
Microfilariae - SpringerLink
2016年12月23日 · They have kept their egg shell, which has been stretched to a “sheath” or are unsheathed (Figs. 1, 2, and 3). Dependent on the species, they appear permanently (e.g., Onchocerca ) or only during certain periods (diurnal or nocturnal) in the periphery of their hosts.
Diagnostic Identification and Differentiation of Microfilariae
2019年9月24日 · The morphologic similarities of the microfilariae and their infrequency in clinical specimens in settings of endemicity present challenges to clinical laboratories in maintaining competence for accurate identification and differentiation. We present here a review of the primary filarial nematodes ca …
Sheathed and unsheathed microfilarial surfaces, interactions with …
How diethylcarbamazine enhances cell adherence to mf surfaces directly or as mediated by specific antibody, complement or as yet untested serum components such as eosinophil granule major basic protein (MBP) remains unknown.