Medical Microbiology

592 10 Helminths

MicrofilariaeofVariousFilarialSpecies

1a

1

2

2a

3

3a

4a

4

5

5a

Loa loa

Wuchereria bancrofti

Brugia malayi

Mansonella perstans Mansonella ozzardi

Fig. 1 0. 17 Differentialdiagnosisofmicrofilariaeinhumanblood:sheathed,large:

1 Loaloa:tipoftail(1a)withseveralnuclei; 2 Wuchereriabancrofti:tipoftail(2a)

withoutnuclei; 3 Brugiamalayi:tipoftail(3a)withsinglenucleus.Unsheathed,

smaller: 4 Mansonellaperstans:tipoftail(4a)roundedwithdenselypackednuclei,

ofteninseveralrowsreachingnearlytothetipofthetail; 5 Mansonellaozzardi: tip

oftail(5a)pointed,tipfreeofnuclei.

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Kayser, Medical Microbiology © 2005 Thieme