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Unformatted text preview: Lecture 21 Lecture 21
Insects & Disease Di Insects Insects & Disease
Insect vectored pathogens: Protozoa Protozoa Viruses Viruses Nematode Nematode worms Bacteria Bacteria Protozoal Protozoal Diseases
Malaria Leishmaniasis Chagas’ Disease African Sleeping Sickness Malaria Malaria Malaria parasite among red blood cells Normal and sickled red blood cells Distribution of sickle cell trait Treatment & Prevention Symptoms Cerebral falciparum falciparum Fever & anemia Leishmaniasis Leishmaniasis Phlebotomus Sandfly Cutaneous leishmaniasis Visceral leishmaniasis – causes
a hugely enlarged spleen and organ failure Mucocutaneous leishmaniasis
Occurs in central South America Chagas’ Chagas’ Disease Chagas’ Disease distribution distribution Chagas’ Disease – Vectors are triatomine kissing bugs Chagas’ Disease symptoms Acute myocarditis African Sleeping Sickness African Sleeping Sickness African Sleeping Sickness Lethargy & coma Bite lesion Most Most vectors of viral diseases are mosquitoes it Aedes aegypti – No. 1 vector of viral diseases of viral diseases West Nile Virus West Nile Virus
Humans are accidental hosts Dengue Dengue
Break Bone Fever Hemorrhagic Dengue petichia Yellow Yellow Fever Yellow fever and the Panama canal Filariasis Filariasis
Caused by infection by nematode worm microfiliariae worm microfiliariae Filaria in the blood Elephantiasis Ele
(Lymphatic filiariasis) Do D og Heartworm Bacterial Bacterial Diseases
Louse-borne relapsing fever Plague – Friday’s Lecture Relapsing Fever Relapsing Fever
Caused by spirochaetes Red blood cells spirochaetes Louse-Borne Relapsing Fever Louse-borne Relapsing Fever Fever
1. WWI and II responsible for more death and disability than any other cause except di th flu 2. More than 1 million died during these More than million died during these epidemics Things Things Blamed on Insects that Have Nothing to Do that Have Nothing to Do with Insects Delusional Parasitosis Delusional Parasitosis Delusional Parasitosis
The Patient: Patient: • May or may not have a rash • Has been seen by numerous specialists • Reject negative findings • Exhibit “matchbox sign • May engage in self mutilation • Use home remedies • Distrust of prescription drugs, • Exposed themselves to dangerous chemicals Bites: Real or Not?
Bacterial infection Chigger mite bites bit Methamphetamine Morgellon’s? Who’s Involved Who Involved
50% 50% Postmenopausal women 45% 45% Drug abusers, all ages 4% 4% Elderly men 1% People with neurological 1% issues All racial/cultural groups All All suffer from stress, loneliness ...
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- Fall '08