Which disease among the given options spreads via pigs?
Swine flu
Understanding Diseases Spread by Animals
The question asks about which specific disease among the provided options is known to spread via pigs. Identifying the transmission routes of different diseases is important in understanding public health.
Analyzing the Disease Options
Let's look at each option and its primary mode of transmission:
- Nipah: Nipah virus is a zoonotic virus, meaning it can be transmitted from animals to humans. Fruit bats (flying foxes) are the natural hosts of the Nipah virus. Human infections can occur through direct contact with infected bats, infected pigs, or other infected animals. It can also spread through consuming food products contaminated by secretions from infected bats (like raw date palm sap) or through close contact with infected people. While pigs can be involved in Nipah outbreaks, it's not solely spread via pigs and bats are the primary reservoir.
- Swine flu: Swine influenza (swine flu) is a respiratory disease of pigs caused by type A influenza viruses. These viruses can circulate among pigs. Sometimes, these viruses can infect people. Human cases of swine flu can occur when people are in close proximity to infected pigs. Human-to-human transmission can also happen, but it is less common than animal-to-human transmission related to direct or indirect exposure to pigs. This option is strongly linked to pigs.
- Zika: Zika virus is primarily transmitted to people through the bite of an infected Aedes species mosquito (specifically Aedes aegypti). It can also be transmitted from a pregnant woman to her fetus, through sex, and through blood transfusion, but the main mode of spread is via mosquitoes. Pigs are not known to be involved in the transmission of Zika virus.
- Plague: Plague is an infectious disease caused by the bacterium Yersinia pestis. It is most commonly transmitted to humans by the bite of infected fleas that have fed on infected rodents like rats, squirrels, or prairie dogs. It can also spread through contact with infected animal tissue or inhaling infectious droplets from people or animals with pneumonic plague. Pigs are not primary vectors or reservoirs for the transmission of plague to humans.
Identifying the Disease Spread via Pigs
Based on the analysis of the transmission routes of each disease:
- Nipah virus can involve pigs in its spread to humans, but bats are the main reservoir.
- Swine flu is specifically an influenza that originates in pigs and can spread to humans from them.
- Zika virus is primarily spread by mosquitoes.
- Plague is primarily spread by fleas from rodents.
Therefore, Swine flu is the disease among the given options that is most directly and commonly associated with spreading via pigs.
Conclusion
Considering the modes of transmission, Swine flu is the disease that spreads via pigs.
| Disease | Primary Mode of Transmission | Involvement of Pigs |
|---|---|---|
| Nipah | Bats, contaminated food, infected animals (including pigs), person-to-person | Can be involved in transmission to humans |
| Swine flu | Infected pigs to humans, human-to-human | Originates in pigs and spreads from them to humans |
| Zika | Mosquito bites, sexual contact, mother to fetus, blood transfusion | Not involved |
| Plague | Flea bites (from infected rodents), contact with infected tissue, respiratory droplets | Not involved |
Revision Table: Disease Transmission Pathways
| Disease | Associated Animal/Vector |
|---|---|
| Nipah | Fruit bats, pigs, other animals |
| Swine flu | Pigs |
| Zika | Mosquitoes |
| Plague | Fleas (from rodents) |
Additional Information: Zoonotic Diseases and Swine Flu
Diseases that can be transmitted between animals and humans are called zoonotic diseases. Many infectious diseases are zoonotic. Swine flu is a classic example of a zoonotic disease involving pigs. Influenza viruses that infect pigs can be different from human influenza viruses. However, these viruses can sometimes change and gain the ability to infect humans, leading to outbreaks or even pandemics, as seen with the 2009 H1N1 influenza pandemic, which originated from a swine influenza virus.
Preventing the spread of zoonotic diseases like Swine flu often involves measures related to animal health, biosecurity on farms, and public health surveillance.
Important Questions from Zoology
Lymph is a tissue fluid present in intercellular spaces. It resembles to
- Which one of the following belongs to 'Pisces'?
Which one of the following statements is NOT correct?
Which of the following kingdoms has/have only unicellular organisms?
Consider the following statements:
1. All Echinoderms are not marine
2. Sponges are exclusively marine
3. Insects are found in all kinds of habitats
4. Many primates are arboreal
Which of the statements given above is/are correct?
