Table 1 Glossary of different important terms

Latent period (τ):

The period from the point of infection to the beginning of the state of infectiousness is known as Latent period during which the infected individuals stay in the exposed (E) class.

Incubation period:

The period from the point of infection to the appearance of symptoms of disease is known as the Incubation period.

Asymptomatic:

In some infections, symptoms do not appear in the individual in spite of being a carrier for a disease and this is called Asymptomatic Infection. The appearance of symptoms is important for case diagnosis and treatment. Sometimes asymptomatic infections are also called subclinical infections.

Vectorial capacity:

All the information (vector density relative to host, biting rate, life expectancy etc.) about the vector populations is incorporated through vectorial capacity, which is defined as the number of potentially infective contacts an individual person makes, through the vector population, per unit time.

Entomological Inoculation Rate (EIR):

Rate of infectious bites per person is termed as Entomological inoculation rate.

Force of infection:

Per capita rate of acquisition of infection by infectious bites is called force of infection.

Clinical immunity:

The immunity, which reduces the probability of clinical disease, is called Clinical immunity.

Anti-parasite immunity:

The immunity, which is responsible for clearance of parasite is called Anti-parasite immunity.

Effectiveness of treatment (∈):

The ratio of the duration of infection for the untreated and treated sensitive parasites.

Cost of resistance (Γ):

The reduction of a resistant parasite's fitness relative to that of a sensitive parasite, when neither parasite is exposed to the drug.