Over a billion people are infected with helminths (parasitic worms) globally.  Diagnosis of helminth infections include the detection of larvae (for
 
 Strongyloides
 
 infections) and ova (for hookworm, whipworm, roundworm, tapeworm, and flukes) in fecal samples.  These photographs show helminth ova in preserved fecal samples that were identified using the foldscope.   Below from left to right:
 
 Necator americanus
 
 ovum;
 
 Strongyloides stercoralis
 
 larvae;
 
 Ascaris lumbricoides
 
 ovum; and
 
 Trichuris trichuria
 
 ovum.




 <a alt="Necator-americanus-ovum.jpg" class="gcloudimg" href="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Necator-americanus-ovum.jpg">
 <img alt="Necator americanus ovum" class="alignnone size-thumbnail wp-image-7744 gcloudimg" data-attachment-id="7744" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Necator americanus ovum" data-recalc-dims="1" height="150" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Necator-americanus-ovum.jpg" width="150"/>
 </a>
 <a alt="Strongyloides-stercoralis-larvae.jpg" class="gcloudimg" href="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Strongyloides-stercoralis-larvae.jpg">
 <img alt="Strongyloides stercoralis larvae" class="alignnone size-thumbnail wp-image-7745 gcloudimg" data-attachment-id="7745" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Strongyloides stercoralis larvae" data-recalc-dims="1" height="150" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Strongyloides-stercoralis-larvae.jpg" width="150"/>
 </a>
 <a alt="Ascaris-lumbricoides-ovum.jpg" class="gcloudimg" href="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Ascaris-lumbricoides-ovum.jpg">
 <img alt="Ascaris lumbricoides ovum" class="alignnone size-thumbnail wp-image-7743 gcloudimg" data-attachment-id="7743" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Ascaris lumbricoides ovum" data-recalc-dims="1" height="150" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Ascaris-lumbricoides-ovum.jpg" width="150"/>
 </a>
 <a alt="Trichuris-trichuria-ovum.jpg" class="gcloudimg" href="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Trichuris-trichuria-ovum.jpg">
 <img alt="Trichuris trichuria ovum" class="alignnone size-thumbnail wp-image-7746 gcloudimg" data-attachment-id="7746" data-comments-opened="1" data-image-meta='{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":"","orientation":"0"}' data-image-title="Trichuris trichuria ovum" data-recalc-dims="1" height="150" src="https://storage.googleapis.com/microcosmosdelta.appspot.com/images/transfer_7742/Trichuris-trichuria-ovum.jpg" width="150"/>
 </a>

Public Health: Helminth detection in preserved fecal samples

Eric Wilson

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