ORGANISMS By sophie jackson

Measles is a highly infectious viral illness that can be very and sometimes lead to serious complications. Its now uncommon in the UK because of the effectiveness of vaccinations.

This is what scientists see under a microscope when they look at measles.

Anyone can get measles if they haven't been vaccinated or they haven't had it before, although it is most common in young children. The infection usually clears in around 7 - 10 days. The initial symptoms of measles develop around 10 days after you are infected. These can include:

  • Cold - like symptoms, such as runny nose, sneezing and a cough.
  • Sore, red eyes that may be sensitive to light.
  • A high temperature (fever), which may reach around 40C.
  • Small grayish - white spots on the inside of the cheeks.

Measles can be unpleasent, but will usually pass without causing any further problems. Once you've had measles, your body builds up resistance to the virus and its highly unlikely that you'll get it again.

Bacterial vaginosis (BV) is a common yet poorly understood condition, in which the balance of bacteria inside the vagina becomes disrupted. BV doesn't usually cause any vaginal soreness or itching, but often causes unusual vaginal discharge. If you have the condition, your discharge may: developĀ a strong fishy smell, particularly after sexual intercourse, become white or grey, become thin and watery.

BV isn't serious for the vast majority of women, although it may be a concern if symptoms of BV develop in pregnancy and you have a history of pregnancy-related complications. Around half of women with bacterial vaginosis have no symptoms.

Black spot is the most serious disease of roses. It is caused by a fungus, Diplocarpon rosae, which infects the leaves and greatly reduces plant vigour. Expect to see leaf markings from spring, which will persist as long as the leaves remain on the plant.

The fungus is genetically very diverse and new strains arise rapidly. Unfortunately, this means that the resistance bred into new varieties usually fails to last because new strains of the fungus arise to overcome it.

These are variable, depending on the rose variety and the strain of the fungus. You may see the following symptoms:

Typically, a rapidly enlarging purplish or black patch appears on the upper leaf surface, with diffuse and radiating strands of the fungus sometimes just visible.

Leaf tissues may turn yellow around the spots and the leaf often drops, even though other parts are as yet unaffected

At other times, the yellow colour does not appear, but infected leaves still drop

Malaria is a serious tropical disease spread by mosquitoes. If it isn't diagnosed and treated promptly, it can be fatal. A single mosquito bite is all it takes for someone to become infected.

It's important to be aware of the symptoms of malaria if you're travelling to areas where there's a high risk of the disease. Symptoms include: fever, headaches, vomiting and muscle pains. The symptoms usually appear between 7 - 18 days of being infected.

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