Vectors - Mites, Ticks, Lice And Fleas

Soap and water can treat, but sulphide creams may be required.

Transovarial = from adult to egg.
Trans-stadial = between each lifecycle stage.

Yes mainly in forest clearnings, at river banks and grassy regions. Tend to form 'mite islands'.

Both males and females are blood feeders, but the females require more.

The statement is true because even with treatment using doxycycline, the mortality rate of Louse-borne epidemic typhus still ranges from 1 to 20%. This means that even with medical intervention, there is still a significant risk of death associated with this disease.

This is a scabies mite.

All lice have three nymphal stages. Nymphs are the immature form of lice that hatch from eggs. After hatching, they go through three molts, or stages, before reaching adulthood. During each molt, the nymph sheds its exoskeleton and grows a new one. Once the lice reach adulthood, they are capable of reproducing. Therefore, the correct answer is 3.

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They are dorso-ventrally flat.

Ornithodourous is a soft tick. It transmits tick-borne relapsing fever (caused by some Borrelia species of bacteria including duttonii and crocidurae (mostly a zoonosis in west Africa).

It has both a rod and two combs. If it has no combs and just a meral rod, it is Xenopsylla cheopsis.

Dermatophagoides is commonly known as the house dust mite. It is a microscopic arthropod that lives in house dust and feeds on dead skin cells. House dust mites are a common cause of allergies and can trigger symptoms such as sneezing, itching, and asthma attacks in sensitive individuals.

Hard ticks can be controlled by treating livestock with acaricide. Acaricides are chemicals specifically designed to kill ticks and other mites. They are commonly applied to livestock to prevent tick infestations and reduce the risk of tick-borne diseases. Treating livestock with acaricide helps to eliminate hard ticks, which are known for attaching firmly to their host's skin and causing various health issues. By targeting hard ticks with acaricide treatment, livestock owners can effectively manage tick populations and protect their animals from tick-related problems.

The only louse vector is the body louse; pediculus humanis corporis.

Fleas go through 3 larval instars to reach a pupal stage before adulthood.

It occurs in hard ticks. Symptoms include ascending paralysis, speech, swallowing and breathing difficulties followed by death if not treated. Removing the tick quicker results in a quicker recovery.

It is not a vector, but does burrow into the skin of feet causing pain, itching and secondary infection. Prevention is by wearing shoes and treatment by careful removal of the flea.

Scrub typhus is caused by the bacterium Orientia tsutsugamushi. It is a mite-borne infectious disease that is commonly found in Asia-Pacific regions. The symptoms of scrub typhus include fever, headache, muscle aches, and rash. If left untreated, it can lead to severe complications such as organ failure. Therefore, it is important to diagnose and treat scrub typhus promptly to prevent complications and ensure a full recovery.

Leptotrombidium mites are known to be vectors of scrub typhus. Scrub typhus is a disease caused by the bacterium Orientia tsutsugamushi and is transmitted to humans through the bite of infected mites. The mites acquire the bacteria by feeding on infected rodents or other animals. Scrub typhus is characterized by symptoms such as fever, headache, rash, and muscle pain. It is primarily found in rural areas of Asia, including countries like Japan, China, and India. Prompt diagnosis and appropriate treatment with antibiotics are crucial in managing scrub typhus infections.

The correct answer is Cimex aka bed bug. The given options are different types of insects or mites. The question asks to identify "this," referring to one of the options. Among the options, the bed bug is commonly known as Cimex. Therefore, the correct answer is Cimex aka bed bug.

An allergic reaction to the faeces and exoskeletons occurs with Dermatopgaoides aka House Dust mite.

Hard ticks have a scutum and 1 nymphal instar.

Bartonella quintana is the causative organism of trench fever. These lice also transmit Louse-borne epidemic fever (Rickettsia prowazeki).

Pulex irritans, Xenopsylla cheopsis, and Nosopsylla are all species of fleas that can act as vectors for Yersinia pestis, the bacteria that causes the bubonic plague. These fleas can become infected with the bacteria after feeding on infected rodents, such as rats, and then transmit the bacteria to humans through their bites. The bubonic plague is a highly contagious and deadly disease, and these fleas play a crucial role in its transmission.