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figure 49-76 Ar Schistosoma mattsoni egg. B, Schistosoma japonicum egg.

C, Schistosoma haematobium egg.

D, Paragonimus westermani egg.

E, Fascioia hepatica egg. F, Clonorchis (Opistorchis) sinensis egg.

figure 49-76 Ar Schistosoma mattsoni egg. B, Schistosoma japonicum egg.

C, Schistosoma haematobium egg.

D, Paragonimus westermani egg.

E, Fascioia hepatica egg. F, Clonorchis (Opistorchis) sinensis egg.

50 |j.m serious side effects; therefore, before initiation of therapy, the following factors must be considered: health of the patient, parasite drug resistance, accuracy of the original dose, potential drug toxicity, and need for follow-up examinations to monitor therapy6,17 (Table 49-22). The mechanisms of action for most antiparasitic drugs are not well known, including potential drug toxicity to the patient. Because of the limited resources of developing nations where a majority of parasitic infections occur, commercial incentive is low for deveP oping effective therapeutics or vaccines. For some drugs? such as tridabendazole and tryparsamide used extensively in veterinary practices, information is scant regarding adverse side effects or toxiaty to humans. Spedfic information can be obtained from the Centers for Disease Control and Prevention, CDC Drug Servicer in Atlanta, Georgia (day [404] 639-3670 or evenings weekends, and holidays [404] 639-2888). Drugs that

Figure 49-80 Microfilaria of Wuchereria bancrofti in thick blood film.

Figure 49-77

üiure 49-79 Anterior and posterior ends of microfilariae found in humans. A, Wuchereria bancrpß. B, Brugia malayi. C, Loa loa. D, Onchocerca Volvulus. E, Mansonella perstans. F, Mansonella streptocerca. G, Mansonetta ozzardi.

Humans

Adult worms in blood (veins)1

Penetrate skin of humans (water)

Eggs in feces or urine (passed into water)

Cercariae emerge from snail (water)

Figure 49-77

Larvae liberated and penetrate snail (development of various other larval forms)

Life cycle of human schistosomes.

Humans Adult worms"

Mature in circulatory system, body cavity, or connective tissue (humans)

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Bacterial Vaginosis Facts

Bacterial Vaginosis Facts

This fact sheet is designed to provide you with information on Bacterial Vaginosis. Bacterial vaginosis is an abnormal vaginal condition that is characterized by vaginal discharge and results from an overgrowth of atypical bacteria in the vagina.

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