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QBC Malaria Parasite Detection System (QBC Paralens)

Paralens assembly

This is a microscope adapter that is a cost-effective click for large imagealternative to fluorescent microscopes.

The paralens UV microscope adapter is a blue-violet light module which provides fibre-optic illumination with an AC outlet that can be attached to any conventional microscope.

The paraviewer microscope tube holder is a specially-designed QBC tube reviewing block that accepts standard microscope oil.

The paralens assembly consists of focusing lens 470 - 490 nm wavelength excitation filter, dichroic beam splitter, 1.0 NA 60 x oil immersion lens, 520 nm wavelength barrier filter and standard royal microscopic society threading.

Focusing lens: Passes white light from illuminator to the excitation filter.

Excitation filter: Passes light in the 470 - 490 nm wavelength while eliminating other wavelengths for optimum fluorescence.

Dichroic beam splitter: Reflects excitation radiation downward with high efficiency. Fluorescence emitted from the specimen is almost entirely transmitted upward.

60x oil immersion lens: For an optimum mix of concentration and clarity.

Barrier filter: Suppresses residual radiation, assures that only safe, visible fluorescence reached the eyes of the microscope operator.

Standard royal microscopic society threading: Assures adaptability to all microscopes.

Paralens illuminator
Cold light source consists of rheostat controlled illumination from a single 21 volt - 150 watt lamp.
Rheostat controlled illumination
Lamp: 21 volt - 150 watt.

Fibre optic cable
Transmits white light from the illuminator.
Length: 18 inches
Diameter: 1/8 inches

Paraviewer
Tube holder for direct examination of capillary tube under the microscope.

QBC centrifuge - model 424740 (a 20-place, portable micro-hematocrit centrifuge with five-minute auto timer)

R E F E R E N C E S

  3rd International Congress on Malaria and Babesiosis
September 7-11,1987

Diagnosis of malaria using quantitative buffy coat (QBC) tubes
Patton CL; Spielman A; Perrone JB; Teklehaimanot A; Philippe E; Zhang Y; Levine RA; Wardlaw SC


  The Journal of Parasitology, April 1990,
Pages 278-281

Rapid diagnosis of brugia malayi and wuchereria bancrofti filariasis by an acridine orange/microhematocrit tube technique
Gary W Long, Leland S Rickman and John H Cross

 Lancet
Vol 1, 1989, Pages 68-71

Rapid diagnosis of malaria by acridine orange staining of centrifuged parasites
Leland S Rickman, Gary W Long, Richard Obrest, Arturo Cabanban, Ruperto Sangalang, Jeffrey D Chulay, Joseph I Smith, Stephen L Hoffman.

 Parasitology Today
Nov 4, 1989

Detection of haematoparasites using quantitive buffy coat analysis tubes
RA Levine, SC Wardlaw and CL Patton

 American Scientist
Nov-Dec, 1988

A new technique for examining blood
Robert A Levine; Stephen C Wardlaw

 The American Journal of Tropical Medicine and Hygiene
October 1988, Pages 337-342

Malaria diagnosis by direct observation of centrifuged samples of blood.

Andrew Spielman, Joseph B Perrone, Awash Teklehaimanot, Fekade Balcha, Stephen C Wardlaw and Robert A Levine.

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