Antimicrobials in agriculture: a short introduction

Leah in Year 12 explores why the use of antimicrobials in commercial livestock agricultural medicine is such a contested issue.

The World Health Organization (WHO) has declared Antimicrobial Resistance (AMR) as one of the Top 10 public health threats facing humanity[1]. While the use of antimicrobials has proved a huge boost to the livestock industry, in terms of faster growth in animals, the concern is that higher concentration of AMR in the food chain risks diminishing how effective antimicrobials will be in the human population.

Antimicrobials are agents used to kill unwanted microorganisms by targeting the ones that may pose a threat to humans and animals. These include antibiotics and antibacterial medication for bacterial infections, antifungal medication for fungal infections and antiparasitic medication for parasites.   

Resistance, or AMR, develops when antimicrobials are not used for their full course, so the weakest strains of bacteria are killed but the strongest ones survive. This means that the strongest strains then have the chance to adapt to the environment. Over time these variant alleles become more common in the population and the antimicrobials will become ineffective.  

As Shown in the graph below[2]from 2015 to 2019, antimicrobial use in farming has actually decreased by 45% but since then has picked up again despite the issue becoming more widespread.

Antimicrobials are used often in the production of both meat and animal product farming such as dairy cows, with two main objectives: promoting growth and preventing disease.  

The prevention of diseases in livestock are less of a contested issue as it is well understood that livestock share living spaces, food, and water. Generally, if one animal contracts a disease then the whole flock is at risk due to the proximity. Antimicrobials can help break this link.  

However, the WHO has a strong viewpoint with antimicrobials as a growth agent.[3]As stated in their guidelines to reducing antimicrobial resistance, the organization believes that ‘antimicrobials should not be used in the absence of disease in animals.’[4]This happens by helping convert the feed that the farmers are giving to their livestock into muscle to cause more rapid growth. The quicker the animal meets slaughter weight the quicker they can send them off to an abattoir and get the profit. For example, a 44kg lamb produces 25kg of meat which is the heaviest a lamb can be so farmers want their lambs to reach 44kg so that they can get the most money from each lamb.  

Image via Pixabay

Over 400,000 people die each year from foodborne diseases each year. With the rise in antimicrobial resistance, these diseases will start to become untreatable. The most common pathogens transmitted through livestock and food to humans are non-typhoidal Salmonella (NTS), Campylobacter, and toxigenic Escherichia coli.  Livestock contain all of these pathogens and so they can spread easily.

The WHO have been addressing AMR since 2001 and are advocating for it to become a more acknowledged issue. In some countries, the use of antimicrobials is already controlled. The US Food and Drugs Association (FDA) has been acting on this matter since 2014 due to the risk on human health.

Antimicrobial Resistance is a contested issue because, as much as AMR is a problem that has a variety of governing bodies backing it, there will always be the point that farmers rely on their livestock for their livelihoods meaning they are often driven by profit to ensure income. Antimicrobial Resistance has always been hard to collect evidence on, so this makes it harder to prove to these farmers that it is a growing issue.


References


[1] World Health Organization, WHO guidelines on use of medically important antimicrobials in food producing animals, 7 November 2017, https://www.who.int/foodsafety/areas_work/antimicrobial-resistance/cia_guidelines/en/
Accessed:  24th April 2021

[2] World Health Organization, Antimicrobial Resistance in in the food chain, November 2017, https://www.who.int/foodsafety/areas_work/antimicrobial-resistance/amrfoodchain/en/
Accessed:  24th April 2021

[3] World Health Organization, Ten threats to global health in 2019, https://www.who.int/news-room/spotlight/ten-threats-to-global-health-in-2019 Accessed:  24th April 2021

[4] Farm Antibiotics – Presenting the Facts, Progress across UK farming, https://www.farmantibiotics.org/progress-updates/progress-across-farming/
Accessed:  24th April 2021

How did reform to the agricultural industry contribute to the Chinese economy?

Emily, Year 12, investigates how reforms to China’s agricultural industry helped to develop the Chinese economy.

Shortly after Deng Xiaoping became the new leader of the People’s Republic of China in 1978, the first economic reforms took place under the agricultural sector. Prior to this, between the years 1966-1978, the agriculture sector’s output was only growing at roughly 3.1% per annum. 20 years of poor agricultural performance called for changes to be made and the lack of arable land amongst the country of China, shared responsibility for this.

Deng Xiaoping, the ‘architect of modern China’  who led the People’s Republic of China from 1978-1989 (Wikepedia)
Deng Xiaoping, the ‘architect of modern China’
who led the People’s Republic of China from 1978-1989 (Wikepedia)

The biggest feature of Chinese agriculture pre-reform was the collective agricultural production. This system proved to be very inefficient and highly unproductive, as grain yields were distributed based on household sizes and there were few incentives to work hard on the land.

Decollectivisation of agriculture one was the first changes made in the late 70s. The original communal system involved all land being collectively owned, with no private land left. The idea of collectivisation was deserted, and the idea of individual responsibility was favoured over the previous ideas of communal responsibility. Although decollectivisation came with a time lag of approximately 5 years, and slowed down agricultural production after being introduced, it is arguably the single main reason of high growth rates in China’s agricultural sector.

In 1981, the ‘Household responsibility system’- an agricultural production system – was introduced. Under this system, the communes that were once formed under the reign of Mao Zedong were abolished. Collectives were no longer the main system of production and this transitioned to the households. The system allowed households to take out contracts to cultivate plots of land with specific crops. Each household was set a procurement quota, which required them to sell a certain amount of crops to the state at a low price; however, anything that they grew outside of the quota they were able to sell.

Near the end of 1978 a trial of the system began in the Anhui province. A year later a comparison of crop yield was made between the households had tested the system of ‘land contracts ’and households that had not yet. The households under the land contract system had a significantly larger crop yield than the others.

Rice Terraces Fields Paddy - Free photo on Pixabay
Rice Terraces Fields Paddy – Free photo on Pixabay

After the proven success of the system this type of farming had taken over nearly all rural households in China. The abolishment of the communal systems was required in order to solve the issue of insufficiency amongst the citizens. The challenge associated with a communal system is that individuals are often obliged to act in their best interests or what will result in the best outcome for them, meaning that there is often a lack of will to provide labour efficiently on the communal plots of land, leading to a smaller yield.

There was also agricultural price reform. ‘State procurement prices’, the amount the government paid for the quotas, rose significantly. The baseline of the reform was to convert collective processes into independent ones. The increasing individuality of each household meant that the self-sufficiency of each citizen grew as they leased a section of land from the previous collective system which resulted in the substantial growth of food to feed their individual families.

To sum up, three central changes were made to the structure of China’s overall agricultural sector in this period.

The first change to be made was the much-needed removal of the communal systems that was an imminent contributing factor to China’s Great Famine. This was replaced with the much more effective household responsibility system.

Secondly, the market for agricultural goods were also deregulated, allowing for a much more expansive and versatile agricultural market.

Finally, prices underwent change in the form of the ‘state procurement prices’ which allowed for increased agricultural output.

The successful combination of the main agricultural reforms paved the way for similar success in other sectors. After the reforms were made, the agricultural sector output rose dramatically. These were the first reforms established by the new leader, and due to its success, proved itself to be a very useful model  for future economic reforms, especially in China’s industrial sector. A 1.5% increase in the growth rate of grain output per annum was seen in the years following the beginning of the reforms.

In 1984, China’s output of grain had exceeded 400 million tons for the first time. The problem associated with a shortage of food to feed the intensely growing population had now been resolved. As a result of the changes to the agricultural system, now only 10% of the Chinese economy comes from agriculture from what used to be an agrarian economy. From 1978 to 1984 the agricultural sector’s output had risen by over 61%.

The incomes of rural households had also risen simultaneously, with a series of positive knock-on effects on the industrial sector. Due to the rising incomes, an automatic increase in aggregate demand occurred as people with more disposable incomes wanted to spend money on consumer goods/services, which ultimately expanded industrial production at the same time. Not only did reform promote a sizeable rise in agricultural output, it aided reduction of people living in poverty.

With families and households becoming increasingly self-sufficient due to the individual plots of land, the number of people who could not afford sufficient nourishment decreased. An increase in industrial production meant there were more factory jobs available, which encouraged people to switch from rural jobs into the city to work in the factories. More income meant more of the population had savings in which they put into banks. Having more savings meant that this money could be used to finance investments in other sectors.


References

Marden, S., 2015. Agriculture, Development And Structural Change In Reform-Era China. [online] Etheses.lse.ac.uk. Available at: <http://etheses.lse.ac.uk/3264/1/Marden_Agriculture_development_and_structural.pdf> [Accessed 8 September 2020].

Huang, Jikun, and Scott Rozelle. “China’s 40 Years of Agricultural Development and Reform.” China’s 40 Years of Reform and Development: 1978–2018, edited by Ross Garnaut et al., ANU Press, Acton ACT, Australia, 2018, pp. 487–506. JSTOR, www.jstor.org/stable/j.ctv5cgbnk.32. Accessed 1 June 2020.

Coursera. 2020. 1.4 Decollectivization Of Agriculture – Orientation And Module 1: China’S Gradualist Reforms | Coursera. [online] Available at: <https://www.coursera.org/lecture/econtransform1/1-4-decollectivization-of-agriculture-cITfm> [Accessed 14 September 2020].

Lin, Justin Yifu. “The Household Responsibility System in China’s Agricultural Reform: A Theoretical and Empirical Study.” Economic Development and Cultural Change, vol. 36, no. 3, 1988, pp. S199–S224. JSTOR, www.jstor.org/stable/1566543. Accessed 1 June 2020.

Oecd.org. 2020. OECD Review Of Agricultural Policies – China – OECD. [online] Available at: <https://www.oecd.org/china/oecdreviewofagriculturalpolicies-china.htm> [Accessed 20 September 2020].

Roberts, J., 2011. A History Of China. Houndmills, Basingstoke, Hampshire: Palgrave Macmillan, p.292

McMillan, John, et al. “The Impact of China’s Economic Reforms on Agricultural Productivity Growth.” Journal of Political Economy, vol. 97, no. 4, 1989, pp. 781–807. JSTOR, www.jstor.org/stable/1832191. Accessed 20 June 2020.