The Ischilín department reported 14 new cases of trichinellosis in 2025.

Trichinella infections are frequently reported in Argentina. Homemade sausage foods do not usually go through regulatory sanitary controls and may be sold privately on the roads of the country.

Trichinellosis is caused by the larvae of an intestinal worm when eating insufficiently cooked meat (mainly pork, but also game and other animals such as bear). Symptoms vary widely: muscle pain, inflammation of the eyelids and eye pain, diarrhea, and fever. Cardiac and neurological complications are possible, and the disease is sometimes fatal.

The first cases of rabies in capybaras (a mammal in the guinea pig family) on the coast of São Paulo raise concerns about virus monitoring. The variant detected in Ilha Anchieta was the same one carried by common vampire bats, which probably fed on the rodents' blood at a time of habitat alteration.

Three capybaras were found dead on Ilha Anchieta, in the municipality of Ubatuba (São Paulo state), between December 2019 and January 2020. The cases occurred shortly after the works carried out on the ruins on that island in 2019, when the roof of a building was renovated and the bats temporarily lost their shelters.

Capybaras:

The risk of mosquito borne infection is increased during the current Australian summer season. Various mosquito borne diseases occur in Australia such as:

• Ross River fever (RRF) is the most commonly reported mosquito-borne disease in Australia, averaging around 5’000 infections each year, although this is likely to be an underestimate of the true number. It is widespread in Australia but more commonly found in Queensland, the Northern Territory and the Kimberley region of Western Australia. Ross-River-virus is an arthritogenic alphavirus.
  
• Murray Valley encephalitis (MVE) - MVE virus is enzootic (endemic in animals) in freshwater habitats of the Kimberley region of Western Australia and the northern area of the Northern Territory. Occasional outbreaks occur as far south as NSW following the migration of infected birds and with local mosquito populations boosted by rainfall/flooding. While most people with MVE virus are asymptomatic, apparent clinical infection is often severe due to neurological involvement, causing death in approximately 15-30% of cases and residual mental or functional disability in up to half of those who survive. The causative virus belongs to the family of flaviviruses.
  
• Dengue - the dengue virus is no longer endemic in Australia but is introduced each year by infected travellers arriving from overseas. Risk of infection is elevated in Queensland or on the Cocoseilande (Throat Islands). 
  
• Japanese Encephalitis occurs in Australia. First outbreaks were reported in 2022 in the states of Queenland, New South Wales (NSW) and Victoria - mainly in the Murray valley with over 70 pig farms affected throughout temperate regions of the country. Human cases and deaths had been reported. In the current season 2024/25, only sporadic human cases have been reported so far. The situation in Torres Strait and Cape York Pennisula in north eastern Australia is unclear since surveillance has been stopped since many years.

For more details to the diseases and other mosquito borne disease in Australia such as Barma Forest and Kunjin virus (a subtype of West Nile virus) infection, see LINK.

On 10 January 2025, WHO received reliable reports from in-country sources regarding suspected cases of Marburg virus disease in the Biharamulo and Muleba  Kagera region of the United Republic of Tanzania. As of 11 January 2025, nine suspected cases were reported including eight deaths (case fatality ratio (CFR) of 89%) across two districts. The cases presented with similar symptoms of headache, high fever, back pain, diarrhoea, haematemesis (vomiting with blood), malaise (body weakness) and, at a later stage of disease, external haemorrhage (bleeding from orifices).

Samples from two patients have been collected and tested by the National Public Health Laboratory. Results are pending official confirmation. Contacts, including healthcare workers, are reported to have been identified and under follow-up in both districts.

The Bukoba district in Kagera region experienced its first MVD outbreak in March 2023, and zoonotic reservoirs, such as fruit bats, remain endemic to the area. The outbreak in March 2023 lasted for nearly two months with nine cases including six deaths. 

Kagera region in Tanzania with possible Marburg virus disease outbreak: